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Infectious Disease Private Practices in Connecticut (53 Verified Groups) | Daniel Aragón

There are 53 physician-owned infectious disease practices in Connecticut, vetted against the NPPES NPI Registry. Hospital-employed, government, and academic positions are excluded.

Without the recruiter filter.

Physician-Owned Infectious Disease Practices in Connecticut

A vetted list of 94 infectious disease practices in Connecticut that are still owned by the physicians who built them. Useful when the recruiter says you have no other options.

Pre-med. Med school. Match. Step 1. Step 2. Boards. Every year there was a next page, and someone always handed it to you.

Once you can name three independent infectious disease groups in your target city, every clause in your hospital contract becomes negotiable in a way it was not five minutes ago. The same non-compete, the same productivity formula, the same partnership track suddenly have something to be measured against. The Real Contract course walks you through every clause that matters.

NOT INCLUDED IN THIS DIRECTORY

Hospital-employed, government-operated, and academic positions are excluded. These are not independent private practices:

Hospital systems

  • Yale New Haven Health
  • ProHealth Physicians
  • Hartford HealthCare
  • Hartford HealthCare Cancer Institute HHCCI comprehensive
  • Trinity Health Of New England
  • Nuvance Health
  • Stamford Health independent
  • ProHealth Physicians Optum-owned

Academic programs

  • UConn Health

Federal facilities

  • VA Connecticut Healthcare System

Tribal health programs

  • Mashantucket Pequot Tribal Nation
  • Mohegan Tribe

All 53 physician-owned infectious disease practices in Connecticut, by city

53practices listed
15cities in CT
0PE or corporate flagged
44with a website
53 practices listed

Grace P Kim MD

Bridgeport, CT

NPPES Verified
Infectious Disease Physician

Grace P Kim MD brings infectious disease expertise to patients in Bridgeport, Connecticut through a physician-owned practice. Contact by phone to discuss potential employment or buy-in opportunities.

4699 Main St #201, Bridgeport, CT 06606

Dr. Zweig & Shanmugam

Bristol, CT

NPPES Verified
InternistInfectious Disease Physician

Dr. Zweig & Shanmugam is a private infectious disease practice located in Bristol, Connecticut. Additional capabilities include internal medicine. Physicians exploring opportunities can reach out through the practice website or by phone.

25 Collins Rd, Bristol, CT 06010

Charles Ray Jones, MD

Brooklyn, CT

NPPES Verified
Infectious Disease Physician

Based in Brooklyn, Connecticut, Charles Ray Jones, MD runs an independently owned infectious disease practice focused on direct physician-patient relationships. Reach out by phone for information about joining this practice.

495 Hartford Rd, Brooklyn, CT 06234

Howard L Quentzel MD

Derby, CT

NPPES Verified
Infectious Disease PhysicianHealth Consultant

Offering infectious disease services in Derby, Connecticut, Howard L Quentzel MD operates outside of hospital employment. Reach the office through their website or direct phone line for career-related questions.

130 Division St, Derby, CT 06418

Dr Jo-Anne Passalacqua

Fairfield, CT

NPPES Verified
Infectious Disease PhysicianInternistTravel Clinic

In Fairfield, Connecticut, Dr Jo-Anne Passalacqua offers infectious disease care as part of the region's private practice scene. Services extend to internal medicine. Reach the office through their website or direct phone line for career-related questions.

1300 Post Rd #208, Fairfield, CT 06824

ID Specialists of Fairfield

Fairfield, CT

NPPES Verified
Infectious Disease Physician

ID Specialists of Fairfield serves the Fairfield, Connecticut community with infectious disease care as a privately run practice. The practice also provides outpatient medical care. Visit the practice website or call to discuss potential openings.

1300 Post Rd #208, Fairfield, CT 06824

Jurate Ivanaviciene, MD

Fairfield, CT

NPPES Verified
Infectious Disease Physician

Jurate Ivanaviciene, MD specializes in Infectious Disease and is part of the multi-specialty Hartford HealthCare Medical Group.

525 Tunxis Hill Cut Off, Fairfield, CT 06825

Dr. Alina R. Alfirii, MD

Hamden, CT

NPPES Verified
Infectious Disease Physician

Based in Hamden, Connecticut, Dr. Alina R. Alfirii, MD runs an independently owned infectious disease practice focused on direct physician-patient relationships. Reach out by phone for information about joining this practice.

2440 Whitney Ave STE 105, Hamden, CT 06518

Ann Palmer, MD

Hartford, CT

NPPES Verified
Infectious Disease Physician

Ann Palmer, MD provides infectious disease services from a privately held practice in Hartford, Connecticut. Physicians exploring opportunities can reach out through the practice website or by phone.

132 Jefferson St, Hartford, CT 06106

Ashley C. Howard, DO

Hartford, CT

NPPES Verified
Infectious Disease PhysicianImmunologistPediatrician

Dr. Ashley Howard is a pediatric infectious disease physician at Connecticut Children's.

85 Seymour St, Hartford, CT 06106

Community Care Center

Hartford, CT

NPPES Verified
Infectious Disease PhysicianAddiction Treatment CenterTravel Clinic

Community Care Center serves the Hartford, Connecticut community with infectious disease care as a privately run practice. Reach the office through their website or direct phone line for career-related questions.

132 Jefferson St 3rd Floor, Hartford, CT 06106

Eunsun Lee, MD

Hartford, CT

NPPES Verified
Infectious Disease Physician

Eunsun Lee, MD provides infectious disease services from a privately held practice in Hartford, Connecticut. Physicians exploring opportunities can reach out through the practice website or by phone.

132 Jefferson St, Hartford, CT 06106

Faiqa Cheema, MD

Hartford, CT

NPPES Verified
Infectious Disease Physician

Faiqa Cheema, MD is board certified in Infectious Diseases and is part of the Hartford Hospital Transplant & Comprehensive Liver Center.

85 Seymour St Suite 320, Hartford, CT 06106

Gavin Schwarz, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianImmunologistPediatrician

Located in Hartford, Connecticut, Gavin Schwarz, MD delivers infectious disease care through an independently managed medical practice. Services extend to children's healthcare. Reach the office through their website or direct phone line for career-related questions.

85 Seymour St, Hartford, CT 06106

Harry Conte, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianInternist

Harry Conte, MD brings infectious disease expertise to patients in Hartford, Connecticut through a physician-owned practice. Beyond infectious disease, the office offers internal medicine. Employment and partnership inquiries can be directed to the practice via their website.

1000 Asylum Ave # 4304, Hartford, CT 06105

Hassan El Chebib, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianImmunologistPediatrician

Hassan El Chebib, MD operates a physician-owned infectious disease practice in Hartford, Connecticut, offering personalized patient care in a private setting. Additional capabilities include children's healthcare. Physicians exploring opportunities can reach out through the practice website or by phone.

85 Seymour St, Hartford, CT 06106

Henry M. Feder Jr., MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianImmunologistPediatrician

Henry M. Feder Jr. sees patients at a private infectious disease office in Hartford, Connecticut, emphasizing physician autonomy in clinical care. Beyond infectious disease, the office offers children's healthcare. Employment and partnership inquiries can be directed to the practice via their website.

85 Seymour St, Hartford, CT 06106

Hillary Hernandez-Trujillo, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianPediatrician

Located in Hartford, Connecticut, Hillary Hernandez-Trujillo, MD delivers infectious disease care through an independently managed medical practice. The practice also provides children's healthcare. Visit the practice website or call to discuss potential openings.

85 Seymour St, Hartford, CT 06106

Ian C. Michelow, MD, FCPaed

Hartford, CT

NPPES Verified
Infectious Disease PhysicianPediatrician

Ian C. Michelow maintains a private infectious disease practice in Hartford, Connecticut, where clinical decisions remain physician-led. Additional capabilities include children's healthcare. Physicians exploring opportunities can reach out through the practice website or by phone.

85 Seymour St, Hartford, CT 06106

Jessica Abrantes-Figueiredo, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianInternist

Practicing infectious disease in Hartford, Connecticut, Jessica Abrantes-Figueiredo offers care through an owner-operated medical office. The practice also provides internal medicine. Visit the practice website or call to discuss potential openings.

1000 Asylum Ave # 4304, Hartford, CT 06105

John R. Schreiber, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianImmunologistPediatrician

John R. Schreiber, MD brings infectious disease expertise to patients in Hartford, Connecticut through a physician-owned practice. Additional capabilities include children's healthcare. Physicians exploring opportunities can reach out through the practice website or by phone.

85 Seymour St, Hartford, CT 06106

Juan C. Salazar, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianImmunologistPediatrician

Juan C. Salazar, MD operates a physician-owned infectious disease practice in Hartford, Connecticut, offering personalized patient care in a private setting. Beyond infectious disease, the office offers children's healthcare. Employment and partnership inquiries can be directed to the practice via their website.

85 Seymour St, Hartford, CT 06106

Lauren Ibrahim, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianInternist

Offering infectious disease services in Hartford, Connecticut, Lauren Ibrahim, MD operates outside of hospital employment. The practice also provides internal medicine. Visit the practice website or call to discuss potential openings.

1000 Asylum Ave # 4304, Hartford, CT 06105

Lavanya Jitendranath, M.D.

Hartford, CT

NPPES Verified
Infectious Disease PhysicianStd Testing Service

Offering infectious disease services in Hartford, Connecticut, Lavanya Jitendranath, M.D. operates outside of hospital employment. Reach the office through their website or direct phone line for career-related questions.

80 Seymour St, Hartford, CT 06106

Melissa R. Held, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianImmunologistPediatrician

Melissa R. Held, MD provides infectious disease services from a privately held practice in Hartford, Connecticut. Beyond infectious disease, the office offers children's healthcare. Employment and partnership inquiries can be directed to the practice via their website.

85 Seymour St, Hartford, CT 06106

Michael Lawlor, MD

Hartford, CT

NPPES Verified
Infectious Disease Physician

Michael Lawlor, MD brings infectious disease expertise to patients in Hartford, Connecticut through a physician-owned practice. Physicians exploring opportunities can reach out through the practice website or by phone.

85 Seymour St, Hartford, CT 06106

Myrla Sajo, MD

Hartford, CT

NPPES Verified
Infectious Disease PhysicianInternist

A solo infectious disease practitioner in Hartford, Connecticut, Myrla Sajo provides care under an independent practice model. The practice also provides internal medicine. Visit the practice website or call to discuss potential openings.

1000 Asylum Ave # 4304, Hartford, CT 06105

Tilahun Gemtessa, MD

Hartford, CT

NPPES Verified
Infectious Disease Physician

Tilahun Gemtessa, MD operates a physician-owned infectious disease practice in Hartford, Connecticut, offering personalized patient care in a private setting. Physicians exploring opportunities can reach out through the practice website or by phone.

1000 Asylum Ave #4303, Hartford, CT 06105

Alina Filozov, DO

Middletown, CT

NPPES Verified
Infectious Disease Physician

Dr. Alina Filozov is a fellowship-trained infectious disease physician at the Middlesex Health MultiSpecialty Group, Medical Director of the Middlesex Health Wound & Ostomy Center, and chair of the Infectious Disease Department at Middlesex Health.

80 S Main St, Middletown, CT 06457

Carlo C. McCalla, MD

Middletown, CT

NPPES Verified
Infectious Disease PhysicianStd Testing Service

Carlo C. McCalla, MD brings infectious disease expertise to patients in Middletown, Connecticut through a physician-owned practice. Physicians exploring opportunities can reach out through the practice website or by phone.

80 S Main St Suite 204, Middletown, CT 06457

Irida Molla, MD

Middletown, CT

NPPES Verified
Infectious Disease PhysicianStd Testing Service

Irida Molla, MD provides infectious disease services from a privately held practice in Middletown, Connecticut. Employment and partnership inquiries can be directed to the practice via their website.

80 S Main St, Middletown, CT 06457

Middlesex Health Infectious Disease - Middletown

Middletown, CT

NPPES Verified
Home Health Care ServiceInfectious Disease Physician

Patients seeking infectious disease care in Middletown, Connecticut can visit Middlesex Health Infectious Disease - Middletown, an independent practice. Physicians exploring opportunities can reach out through the practice website or by phone.

80 S Main St, Middletown, CT 06457

Middlesex Health Urgent Care - Middletown

Middletown, CT

NPPES Verified
Urgent Care CenterHome Health Care ServiceInfectious Disease Physician

Middlesex Health Urgent Care - Middletown operates a infectious disease medical office in Middletown, Connecticut, outside of hospital employment. Beyond infectious disease, the office offers walk-in and urgent medical care. Employment and partnership inquiries can be directed to the practice via their website.

896 Washington St, Middletown, CT 06457

Shiven B. Chabria, M.D.

Middletown, CT

NPPES Verified
Infectious Disease PhysicianStd Testing Service

Shiven B. Chabria sees patients at a private infectious disease office in Middletown, Connecticut, emphasizing physician autonomy in clinical care. Physicians exploring opportunities can reach out through the practice website or by phone.

80 S Main St Suite 204, Middletown, CT 06457

Dr. Michael D. Virata, MD

New Haven, CT

NPPES Verified
Infectious Disease Physician

Dr. Michael D. Virata sees patients at a private infectious disease office in New Haven, Connecticut, emphasizing physician autonomy in clinical care. Call the practice directly to ask about current physician openings or partnership opportunities.

1450 Chapel St, New Haven, CT 06511

Fikrig Margaret MD

New Haven, CT

NPPES Verified
Infectious Disease Physician

Fikrig Margaret MD operates a physician-owned infectious disease practice in New Haven, Connecticut, offering personalized patient care in a private setting. Call the practice directly to ask about current physician openings or partnership opportunities.

15 York St, New Haven, CT 06510

Jessica Tuan

New Haven, CT

NPPES Verified
Infectious Disease PhysicianHealth Care Facility

Jessica Tuan maintains a private infectious disease practice in New Haven, Connecticut, where clinical decisions remain physician-led. Call the practice directly to ask about current physician openings or partnership opportunities.

15 York St, New Haven, CT 06510

Joseph Canterino

New Haven, CT

NPPES Verified
InternistInfectious Disease Physician

Joseph Canterino maintains a private infectious disease practice in New Haven, Connecticut, where clinical decisions remain physician-led. Additional capabilities include internal medicine. Call the practice directly to ask about current physician openings or partnership opportunities.

1450 Chapel St, New Haven, CT 06511

Wainscoat, Booth

Norwalk, CT

NPPES Verified
Infectious Disease PhysicianInternist

Based in Norwalk, Connecticut, Wainscoat, Booth provides infectious disease services through a private practice model. Services extend to outpatient medical care and internal medicine. Reach the office through their website or direct phone line for career-related questions.

761 Main Ave Building E, Room 112, Norwalk, CT 06851

Michael Rajkumar, MD

Norwich, CT

NPPES Verified
Infectious Disease Physician

Michael Rajkumar, MD specializes in Infectious Disease and is part of the multi-specialty Hartford HealthCare Medical Group.

12 Case St #313, Norwich, CT 06360

Middlesex Health Urgent Care - Old Saybrook

Old Saybrook, CT

NPPES Verified
Home Health Care ServiceInfectious Disease PhysicianRadiologist

Our Urgent Care and Walk-in Center in Old Saybrook is open 7 days week to provide immediate treatment for illnesses and injuries that aren't serious enough for an emergency room visit. Get the no-appointment-needed convenience of a walk-in visit, plus the high quality care and service you've come to expect from Middlesex Hospital's physicians, nurses and staff.

154 Main St, Old Saybrook, CT 06475

Andrea Shahum, MD, PhD

Stamford, CT

NPPES Verified
InternistInfectious Disease Physician

Andrea Shahum maintains a private infectious disease practice in Stamford, Connecticut, where clinical decisions remain physician-led. Additional capabilities include internal medicine. Call the practice directly to ask about current physician openings or partnership opportunities.

32 Strawberry Hill Ct 4th floor suite 6, Stamford, CT 06902

Dr. Lynda S. Streett, MD

Stamford, CT

NPPES Verified
Infectious Disease Physician

Dr. Lynda S. Streett, MD provides infectious disease services from a privately held practice in Stamford, Connecticut. Contact by phone to discuss potential employment or buy-in opportunities.

166 W Broad St, Stamford, CT 06902

Zero Hour Health

Stamford, CT

NPPES Verified
Health ConsultantFood And Beverage ConsultantInfectious Disease Physician

A privately owned infectious disease practice, Zero Hour Health is located in Stamford, Connecticut. Physicians exploring opportunities can reach out through the practice website or by phone.

1200 High Ridge Rd, Stamford, CT 06905

Abdul Sheikh, MD

Torrington, CT

NPPES Verified
Infectious Disease Physician

Abdul Sheikh sees patients at a private infectious disease office in Torrington, Connecticut, emphasizing physician autonomy in clinical care. Physicians exploring opportunities can reach out through the practice website or by phone.

538 Litchfield St #203, Torrington, CT 06790

Alliance Medical Group - Infectious Disease/Travel Medicine

Waterbury, CT

NPPES Verified
Hiv Testing CenterInfectious Disease Physician

Offering infectious disease care in Waterbury, Connecticut, Alliance Medical Group - Infectious Disease/Travel Medicine maintains independence from hospital systems. The practice also provides outpatient medical care. Visit the practice website or call to discuss potential openings.

160 Robbins St, Waterbury, CT 06708

Arjet Gega, MD

Waterbury, CT

NPPES Verified
Infectious Disease PhysicianInternist

Arjet Gega, MD operates a physician-owned infectious disease practice in Waterbury, Connecticut, offering personalized patient care in a private setting. Additional capabilities include internal medicine. Physicians exploring opportunities can reach out through the practice website or by phone.

133 Scovill St STE 201, Waterbury, CT 06706

Bethel Shiferaw, MD

Waterbury, CT

NPPES Verified
Infectious Disease Physician

Offering infectious disease services in Waterbury, Connecticut, Bethel Shiferaw, MD operates outside of hospital employment. Visit the practice website or call to discuss potential openings.

56 Franklin St, Waterbury, CT 06706

Dr. Shiven B. Chabria, MD

Waterbury, CT

NPPES Verified
InternistInfectious Disease Physician

Dr. Shiven Chabria specializes in internal medicine and infectious disease. Dr. Chabria is certified by the American Board of Internal Medicine.

160 Robbins St, Waterbury, CT 06708

Dr. Steven I. Aronin, MD

Waterbury, CT

NPPES Verified
Infectious Disease Physician

Dr. Steven Aronin in infectious disease and HIV. Dr. Aronin is a member of the American College of Physicians, Infectious Disease Society of America and HIV Medicine Association .

160 Robbins St, Waterbury, CT 06708

Michael Simms, MD

Waterbury, CT

NPPES Verified
Infectious Disease Physician

Dr. Simms joined the faculty in 1984 following a fellowship in Infectious Diseases at Brown University School of Medicine.

56 Franklin St, Waterbury, CT 06706

Sailaja Puttagunta, MD

Waterbury, CT

NPPES Verified
Infectious Disease Physician

Offering infectious disease services in Waterbury, Connecticut, Sailaja Puttagunta, MD operates outside of hospital employment. Reach the office through their website or direct phone line for career-related questions.

56 Franklin St, Waterbury, CT 06706

Santhi Singanamala, MD

Waterbury, CT

NPPES Verified
InternistInfectious Disease Physician

Offering infectious disease services in Waterbury, Connecticut, Santhi Singanamala, MD operates outside of hospital employment. Services extend to internal medicine. Reach the office through their website or direct phone line for career-related questions.

56 Franklin St, Waterbury, CT 06706

About this directory and the Connecticut infectious disease market

Training ends. The map does not continue.

Then graduation approaches and the algorithm stops. A recruiter calls. The contract has a productivity formula you cannot solve for, a non-compete you cannot evaluate, and a tail-coverage clause nobody explained.

Before you compare salary numbers, see how many physician-owned groups actually exist in your specialty and state. Then negotiate from leverage instead of from gratitude.

What other resources point to in Connecticut

You're looking at 53 physician-owned infectious disease practices in Connecticut. I sourced all of them from the NPPES NPI Registry and filtered out everything that doesn't meet the standard of independent physician ownership. Hospital systems, academic centers, staffing agencies, and corporate-acquired practices are not on this list. Each entry includes the practice address, phone, website, and NPI number. The coverage spans 15 cities statewide.

Most physicians looking for infectious disease opportunities in Connecticut start with a recruiter or a job board. Both of those sources mix hospital-employed roles with genuine private practice opportunities, and they rarely disclose ownership structure upfront. This page does one thing differently: it filters for physician ownership using the federal NPPES registry. That's it. The result is 53 practices you can contact directly, without a middleman deciding what you're allowed to see.

The Connecticut infectious disease market in detail

Connecticut's physician-owned infectious disease directory lists 53 practice locations across 15 cities.

None of the infectious disease practices listed in Connecticut carry a PE-Backed or Corporate-Acquired flag. All listings in this directory are physician-owned independent practices verified through NPPES.

Practices span 15 cities including Bridgeport, Bristol, Brooklyn, and Derby.

The PGY-Final-Year Path

Three steps from "recruited" to "recruiter."

See what is out there. Read the contract. Get a physician-specific attorney to sign off. In that order.

1
See what is around you

You are already here. 53 physician-owned infectious disease groups in Connecticut, vetted against NPPES.

2
Read your contract

The Real Contract walks you through every clause that matters: non-compete, productivity, tail coverage, partnership track.

3
Hire the right lawyer

A vetted directory of physician-contract attorneys in Connecticut. The person on your side should be one who actually does this work.

Stop being recruited. Start choosing.

The hospital is one option. Here are the others.

Browse 94 physician-owned infectious disease groups in Connecticut, then read the contract you were handed with everything else in view.

“You spent fifteen years on a map. Then someone took it away.”

Daniel Aragón, MD, MBA

Frequently asked questions about infectious disease in Connecticut

How many Infectious Disease private practices are in Connecticut?

There are 53 physician-owned infectious disease private practices in Connecticut, verified against the NPPES NPI Registry. All are independently operated. Hospital-employed, government, corporate, and academic positions are excluded.

What does physician-owned mean?

A physician-owned practice is one where licensed physicians hold controlling ownership of the business entity. This is distinct from hospital employment, corporate medical groups, or private equity-backed practices where non-physician entities control the business.

What does the Corporate-Acquired or MSO-Affiliated flag mean?

The Corporate-Acquired flag means the practice was historically physician-owned but has since been acquired by a corporate entity such as Optum. The MSO-Affiliated flag means the practice uses a Management Services Organization for billing and administration while physicians retain practice-level ownership.

Inpatient Consulting vs. Outpatient Models in Connecticut Infectious Disease Practice

Connecticut doesn't have physician-owned independent infectious disease practices in this directory. Infectious disease care here runs through hospital systems like Yale New Haven Health, and Hartford HealthCare, and Trinity Health Of New England.

What is an NPPES-verified practice?

NPPES is the National Plan and Provider Enumeration System, a federal database maintained by CMS. Every practice in this directory has an active NPI record in NPPES, confirming it is a registered U.S. medical practice.

What outpatient revenue sources do private infectious disease practices in Connecticut use?

Private ID practices in Connecticut with strong outpatient models often combine: HIV primary care (with Ryan White Title III grant funding where applicable, which supports the practice financially for uninsured patients), travel medicine (yellow fever vaccination, malaria prophylaxis, pre-travel consultations, largely cash-pay), and outpatient antibiotic infusion therapy (OPAT) for patients completing IV antibiotic courses at home or in the office. These outpatient revenue streams reduce dependence on hospital inpatient admissions volume.

How Physician-Owned Practices Compare

Physician-Owned Hospital-Employed Corporate / PE-Backed
Who controls the practicePhysiciansHealth systemNon-physician entity
Non-compete scopeNarrower, negotiableBroadVery broad
Partnership / buy-in pathCommonRareRare
Call schedule flexibilityHigherVariableLower
Productivity bonus upsideHighModerateModerate
Included in this directoryYesNoFlagged

Key Terms in Physician Contracts

PLLC (Professional Limited Liability Company)
A hybrid entity combining LLC flexibility with professional licensing requirements. PLLCs are common for physician-owned practices in states that permit them. They offer pass-through taxation and personal liability protection for non-malpractice claims.
MSO (Management Services Organization)
A non-physician entity that provides administrative infrastructure (billing, coding, EHR support, payer contracting) to physician-owned practices. MSO arrangements let physicians retain clinical and practice ownership while outsourcing back-office operations. Private equity commonly uses MSO structures to influence practice operations without technically owning the medical entity.
NPI (National Provider Identifier)
A unique 10-digit number assigned to every U.S. healthcare provider and organization by CMS. Individual physicians receive a Type 1 NPI; practice entities receive a Type 2 NPI. The NPI is used across all payers for billing and credentialing.
Restrictive Covenant
Any contractual clause that limits a physician's professional activities after leaving an employer. Non-compete clauses are the most common restrictive covenant, but the category also includes non-solicitation clauses (prohibiting contact with former patients or staff) and non-disparagement clauses.
Fair Market Value
The price at which a willing buyer and willing seller would agree to transact, with both parties having reasonable knowledge of the relevant facts. Physician compensation must meet fair market value to comply with federal anti-kickback and Stark Law requirements. Independent valuations are used for buy-in pricing, compensation benchmarking, and practice sales.
Ryan White HIV/AIDS Program
A federal program providing funding to states, metropolitan areas, and clinics to provide care and treatment for low-income people living with HIV who lack adequate health coverage. Ryan White-funded clinics can receive grants that support clinical operations serving uninsured or underinsured HIV patients.
OPAT (Outpatient Parenteral Antibiotic Therapy)
Administration of intravenous antibiotics in an outpatient setting (home, infusion center, or physician office) for infections requiring prolonged IV treatment. OPAT services billed by the managing ID physician generate professional fee revenue; if the practice provides the infusion facility, additional facility fees may apply.

This directory is maintained by Daniel Aragón, MD, MBA, a physician who just walked this path. All listings are pulled from the (CMS.gov), the federal database of all U.S. medical providers. Hospital-employed, corporate, and government-operated positions are excluded. Last updated: .

Daniel Aragón, MD, MBA. A physician who just walked this path.