Clinicians affiliated with Physicians Referral Service

2,765 clinicians on file with this group · most practice in Houston-Pasadena-The Woodlands, TX · PAC ID 7911801410

Affiliation snapshotOctober 2, 2026CMS Doctors and Clinicians file, current snapshot (no end-of-2024 archive), applied to 2024
Activity year2024Medicare Part B claims, Original Medicare fee-for-service

2,327 clinicians affiliated with Physicians Referral Service are in the 2024 Medicare Part B data, 1,288 of them physicians. Data years with affiliated clinicians: 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024.

Each clinician's exact figures are in their Physician Report, from their page; a specialty's figures in this market are in a Market Comparison. View sample report · Already purchased? Open your report

Affiliated clinicians by specialty, 2024

All specialties · Nurse Practitioner (538) · Physician Assistant (342) · Diagnostic Radiology (160) · Internal Medicine (124) · Certified Registered Nurse Anesthetist (CRNA) (120) · Pathology (120) · Medical Oncology (95) · Anesthesiology (94) · Radiation Oncology (89) · Hematology-Oncology (78) · General Surgery (35) · Emergency Medicine (32) · Surgical Oncology (30) · Neurology (26) · Plastic and Reconstructive Surgery (26) · Interventional Radiology (25) · Gastroenterology (24) · Hospice and Palliative Care (23) · Otolaryngology (23) · Dermatology (21) · Urology (20) · Infectious Disease (19) · Endocrinology (18) · Hematology (18) · Gynecological Oncology (17) · Cardiology (16) · Hematopoietic Cell Transplantation and Cellular Therapy (15) · Neurosurgery (15) · Psychologist, Clinical (13) · Critical Care (Intensivists) (12) · Pulmonary Disease (12) · Hospitalist (11) · Nuclear Medicine (11) · Anesthesiology Assistant (10) · Physical Medicine and Rehabilitation (9) · Certified Clinical Nurse Specialist (8) · Nephrology (8) · Thoracic Surgery (8) · Ophthalmology (7) · Oral Surgery (Dentist only) (7) · Orthopedic Surgery (7) · Obstetrics & Gynecology (6) · Pain Management (6) · Psychiatry (5) · Rheumatology (5) · Colorectal Surgery (Proctology) (4) · Family Practice (4) · Vascular Surgery (4) · Clinical Cardiac Electrophysiology (1) · General Practice (1) · Geriatric Medicine (1) · Geriatric Psychiatry (1) · Licensed Clinical Social Worker (1) · Medical Genetics and Genomics (1) · Pediatric Medicine (1)

Specialty links go to the specialty in Houston-Pasadena-The Woodlands, TX.

Clinicians affiliated with Physicians Referral Service, 2024

Alphabetical by last name; 1,401–1,500 of 2,327.

NameSpecialtyCity
Hong T Nguyen, PAPhysician AssistantHouston, TX
Hong T Nguyen, APRN, MSN, NP-CNurse PractitionerHouston, TX
Jason H Nguyen, PANurse PractitionerHouston, TX
John N Nguyen, APRNNurse PractitionerHouston, TX
Khanh T Nguyen, MDHospitalistHouston, TX
Linh T Nguyen, M.D.AnesthesiologyHouston, TX
Lynn V Nguyen, PA-CPhysician AssistantHouston, TX
Nga NguyenPhysician AssistantHouston, TX
Nga N Nguyen, APRN-CNPNurse PractitionerHouston, TX
Nghi C Nguyen, MD, PHDDiagnostic RadiologyHouston, TX
Nina Nguyen, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Quynh - Nhu Nguyen, MDRadiation OncologyHouston, TX
Son V Nguyen, MDInternal MedicineHouston, TX
Thien-Phuong Nguyen, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Thuy Nguyen, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Thuy T Nguyen, PAPhysician AssistantHouston, TX
Tracy T Nguyen, APRNNurse PractitionerHouston, TX
Trung D Nguyen, APRNNurse PractitionerHouston, TX
Vincent Nguyen, PAPhysician AssistantFulshear, TX
Vinh Q Nguyen, M.D., M.B.A.Family PracticeHouston, TX
Arlene M Nguyen-Paningbatan, APRNNurse PractitionerHouston, TX
Nancy N Nguyen-Vu, DNP, APRN, FNP-BCNurse PractitionerHouston, TX
Emily S Nia, M.D.Diagnostic RadiologyHouston, TX
Maria Luzalie C Niangar, RN, FNP, NP-CNurse PractitionerHouston, TX
Diana A Nichols, NPNurse PractitionerHouston, TX
Talula A Nicholson, NPNurse PractitionerHouston, TX
Yago L Nieto, M.D.Hematopoietic Cell Transplantation and Cellular TherapyHouston, TX
Tilu A Ninan, NPNurse PractitionerHouston, TX
Matthew S Ning, MD, MPHRadiation OncologyHouston, TX
Sigismund S Njogopa, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Daniel Nobrega Da Costa, MDDiagnostic RadiologyHouston, TX
Kyle Noll, PHDPsychologist, ClinicalHouston, TX
Lisa Norman, PMHNPNurse PractitionerHouston, TX
Peter H Norman, M.D.AnesthesiologyHouston, TX
Robert Y North, MDNeurosurgeryHouston, TX
Sonal S Noticewala, MDRadiation OncologyHouston, TX
Kent Nouri, M.D.Pain ManagementHouston, TX
Kelli L Nugent, PA-CPhysician AssistantHouston, TX
Jorge L Nunez, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Chiamaka N Nwachukwu, APRNNurse PractitionerHouston, TX
Ngozi C Nweze, M.D.Emergency MedicineGermantown, MD
Adaeze Nwosu- Iheme, MDHematology-OncologyHouston, TX
Chijioke C Nze, MD, MPHInternal MedicineHouston, TX
Jennifer Obodoechina, FNPNurse PractitionerHouston, TX
Barbara J O'Brien, MDNeurologyHouston, TX
Orhue OdaroInternal MedicineHouston, TX
Bruno C Odisio, M.D.Interventional RadiologyHouston, TX
Brittney O'Grady, PA-CPhysician AssistantHouston, TX
Adenike N Ogunleye, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Jeong H Oh, M.D.Internal MedicineHouston, TX
Maro N Ohanian, DOHematology-OncologyHouston, TX
Abolanle K Ojelade, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Chi Y Ok, M.D.PathologyWorcester, MA
Oluchi Oke, M.D.Hematology-OncologyHouston, TX
Pablo C Okhuysen, M.D.Infectious DiseaseHouston, TX
Ifeoma P Okoye, CRNACertified Registered Nurse Anesthetist (CRNA)Galveston, TX
Frances C Okpaluba, NPNurse PractitionerHouston, TX
Kodili C OkpalubaNurse PractitionerHouston, TX
Sikiratu L Olawunmi, FNPNurse PractitionerHouston, TX
Jonathon B Olenczak, MDPlastic and Reconstructive SurgeryHouston, TX
Jodi-Ann M Oliver, MDAnesthesiologyHouston, TX
Amanda L Olson, MDHematopoietic Cell Transplantation and Cellular TherapyHouston, TX
Kaitlin Olson, FNP-CNurse PractitionerHouston, TX
Erika O'Neal, AGACNP-BCNurse PractitionerHouston, TX
Hasana O'Neal, PA-CPhysician AssistantHouston, TX
Jane A Onufer, M.D.Diagnostic RadiologyHouston, TX
Thein H Oo, M.D.Hematology-OncologyHouston, TX
Roney M OommenNurse PractitionerHouston, TX
Betul Oran, M.D.Hematopoietic Cell Transplantation and Cellular TherapyHouston, TX
Michael S O'Reilly, M.D.Radiation OncologyHouston, TX
Robert Z Orlowski, MDMedical OncologyHouston, TX
Jacob W Ormsby, M.D., M.B.A.Diagnostic RadiologyHouston, TX
Veronica R Ortega, APRN, CRNACertified Registered Nurse Anesthetist (CRNA)Houston, TX
Cesiah Ortiz, NPNurse PractitionerHouston, TX
Marjorie R Ortiz, AGNPNurse PractitionerHouston, TX
Jessica A Osburn, NPNurse PractitionerHouston, TX
David E Ost, M.D.Pulmonary DiseaseNew York, NY
Uzondu C Osuagwu, M.D.Pain ManagementHouston, TX
Michael Ott, M.D.Emergency MedicineHouston, TX
Sara M Otto, NPNurse PractitionerHouston, TX
Adegbenga O Otun, DDSOral Surgery (Dentist only)Houston, TX
Michael J Overman, M.D.Medical OncologyHouston, TX
Gavin G Ovsak, MDAnesthesiologyHouston, TX
Karla Ow, APRNNurse PractitionerHouston, TX
Jennifer A Owens, MS, APRN, FNP-CNurse PractitionerHouston, TX
Adebukola Owolabi, M.DAnesthesiologyHouston, TX
Pascal O Owusu-Agyemang, MDAnesthesiologyHouston, TX
Gloria OyekanmiNurse PractitionerGalveston, TX
Bena E Ozcelik, PA-CPhysician AssistantHouston, TX
Omar Pacha, M.D.DermatologyHouston, TX
Hunter Paddock, PAPhysician AssistantHouston, TX
Lini J Paily, FNP-CNurse PractitionerHouston, TX
Linda M Pak, M.D.General SurgeryHouston, TX
Chandni Pal, PA-CPhysician AssistantHouston, TX
Punit Pala, PA-CPhysician AssistantHouston, TX
Cristen M Palacio, PA-CPhysician AssistantHouston, TX
Diana M Palacio Uran, M.D.Diagnostic RadiologyGalveston, TX
Nicolas Palaskas, MDCardiologyHouston, TX
Lauren E Palmer, PA-CPhysician AssistantHouston, TX
Lindsey D Palmer, FNP-BCNurse PractitionerHouston, TX

Practice locations

Listed practice locations in Texas.

Source: CMS Doctors and Clinicians National Downloadable File, snapshot October 2, 2026.

Membership comes from the CMS Doctors and Clinicians file. CMS does not publish an end-of-year archive of it, so the current snapshot is applied to every data year. A clinician affiliated with several groups or hospitals appears on each of their pages. How group pages are built · Limitations