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
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; 1,701–1,800 of 2,327.
| Name | Specialty | City |
|---|---|---|
| Kevin Richardson, AA-C | Anesthesiology Assistant | Houston, TX |
| Raven M Richmond, PA-C | Physician Assistant | Houston, TX |
| Kathryn Ripley, MSN, APRN, AGACNP-BC | Nurse Practitioner | Houston, TX |
| Francis W Risulme, AGACNP-BC | Nurse Practitioner | Houston, TX |
| Jacqueline R Rivas, APRN | Nurse Practitioner | Houston, TX |
| Ferdinand C Rivera, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Houston, TX |
| Gerardo Rivera, PA-C | Physician Assistant | Houston, TX |
| Zandra R Rivera, RN, BSN, MS, APRNBC | Nurse Practitioner | Houston, TX |
| Brian M Rivers, PA-C | Physician Assistant | Houston, TX |
| Janene D Roberson-Marshall, PA-C | Physician Assistant | Houston, TX |
| David J Robinson, M.D. | Emergency Medicine | Houston, TX |
| Justine L Robinson, PA-C | Physician Assistant | Houston, TX |
| Caitlin E Rochelle, MPAS | Physician Assistant | Rogers, AR |
| Theresa E Rodgers, PA | Physician Assistant | Houston, TX |
| Jordi Rodon Ahnert, MD | Medical Oncology | Houston, TX |
| Christopher R Rodriguez, AGACNP-BC | Nurse Practitioner | Houston, TX |
| Andrea Rodriguez Kawas, MD | Internal Medicine | Houston, TX |
| Michelle L Rohlfs, RN, FNP | Nurse Practitioner | Houston, TX |
| Kristin E Rojas, MD | Surgical Oncology | Miami, FL |
| Cristhiam M Rojas-Hernandez, M.D. | Internal Medicine | Houston, TX |
| Christina L Roland, MD | Surgical Oncology | Houston, TX |
| Carlos J Roldan Jimenez, MD | Pain Management | Houston, TX |
| Johnny Rollins, NP | Nurse Practitioner | Houston, TX |
| Marlena Roman, PA | Physician Assistant | Houston, TX |
| Craig Roorda, P.A. | Physician Assistant | Houston, TX |
| Lou Franz A Roque, APRN | Nurse Practitioner | Houston, TX |
| Kristyn-Mae R Rosales, APRN, FNP | Nurse Practitioner | Houston, TX |
| Monique H Rose, PA-C | Physician Assistant | Houston, TX |
| David I Rosenthal, M.D. | Radiation Oncology | Houston, TX |
| Alicia C Ross, PA | Physician Assistant | Houston, TX |
| Merrick I Ross, M.D. | General Surgery | Houston, TX |
| William A Ross, MD | Gastroenterology | Houston, TX |
| Margaret J Roubaud, M.D. | Plastic and Reconstructive Surgery | Houston, TX |
| Mark J Routbort, M.D., PHD | Pathology | Houston, TX |
| Margaret B Row, M.D. | Emergency Medicine | Houston, TX |
| Elisha Rowland, MD | Emergency Medicine | The Woodlands, TX |
| Jonathan Rowland, M.D. | Emergency Medicine | Houston, TX |
| Mercy A Roy, APRN | Nurse Practitioner | Houston, TX |
| Sinchita Roy Chowdhuri, M.D., PH.D. | Pathology | Houston, TX |
| David A Rubio, M.D. | Internal Medicine | Houston, TX |
| Erika M Rucker, PA-C | Physician Assistant | Houston, TX |
| Joseph R Ruiz, M.D. | Anesthesiology | Houston, TX |
| Eric Rupe, MD | Diagnostic Radiology | Houston, TX |
| Joshua C Russell, PA-C | Physician Assistant | Lexington, KY |
| San Juanita C Rutledge, MSN, RN, ANP | Nurse Practitioner | Houston, TX |
| Catherine M Rytting, PA-C | Physician Assistant | Houston, TX |
| Bruce F Sabath, M.D. | Pulmonary Disease | Houston, TX |
| Bradley Sabloff, M.D.,C.M. | Diagnostic Radiology | Houston, TX |
| Santhosh Sadasivan, PA-C | Physician Assistant | Houston, TX |
| Nazia M Sadiq, MD | Hospitalist | Houston, TX |
| Mahwish Sadruddin, PA-C | Physician Assistant | Houston, TX |
| Tara L Sagebiel, MD | Diagnostic Radiology | Houston, TX |
| Oded Sagiv, M.D. | Ophthalmology | Houston, TX |
| Sunil K Sahai, M.D. | Internal Medicine | Galveston, TX |
| Hadeel Sahar, MD | Hospitalist | Houston, TX |
| Aysegul A Sahin, M.D. | Pathology | Houston, TX |
| Neeraj Saini, MD | Hematology | Houston, TX |
| Alice Saji, FNP | Nurse Practitioner | Houston, TX |
| Lijo Saji | Nurse Practitioner | Houston, TX |
| Bilja K Sajith | Nurse Practitioner | Houston, TX |
| Alexandra Saldana, PA-C | Physician Assistant | Houston, TX |
| Sadia Saleem, M.D. | Internal Medicine | Houston, TX |
| Ahmed H Salem, MBCHB, MS | Diagnostic Radiology | Houston, TX |
| Usama I Salem, M.D., MB BCH | Diagnostic Radiology | Houston, TX |
| Annamma V Sam, RN, WHNP | Nurse Practitioner | Houston, TX |
| Ancy Samuel, APRN | Nurse Practitioner | Houston, TX |
| Jesvin A Samuel, NP-C | Nurse Practitioner | Houston, TX |
| Justyn S Samways, M.D. | Emergency Medicine | Houston, TX |
| Khaled Sanber, M.D., PH.D | Medical Oncology | Houston, TX |
| Miguel A Sanchez, APRN | Nurse Practitioner | Houston, TX |
| Marcelo Sandoval, M.D., | Emergency Medicine | Houston, TX |
| Jaya Sanjo, NP | Nurse Practitioner | Houston, TX |
| David R Sanon, PA-C | Physician Assistant | Houston, TX |
| Lumarie Santiago, M.D. | Diagnostic Radiology | Houston, TX |
| Minifrida S Santiago, APRN | Nurse Practitioner | Houston, TX |
| David A Santos, M.D. | General Surgery | Houston, TX |
| Joyzelle M Santos, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Houston, TX |
| Kenneth J Sapire, M.D. | Anesthesiology | Houston, TX |
| Alya K Saqer, AGACNP-BC | Nurse Practitioner | Houston, TX |
| Naveed U Saqib, MD | Vascular Surgery | Pasadena, TX |
| Iman Sarami, MD | Pathology | Houston, TX |
| Mona G Sarkiss, M.D., PHD | Anesthesiology | Houston, TX |
| Achal Sarna, M.D. | Diagnostic Radiology | Houston, TX |
| Robert Satcher, MD | Orthopedic Surgery | Houston, TX |
| Cecilia A Savoie, P.A. | Physician Assistant | Houston, TX |
| Christopher P Scally, M.D. | General Surgery | Houston, TX |
| Elizabeth A Schacht, PA | Physician Assistant | Houston, TX |
| Anna Schaneville, FNP-C | Nurse Practitioner | Houston, TX |
| Cassidy L Scharff, PA-C | Physician Assistant | Houston, TX |
| Mark Schaverien, MD | Plastic and Reconstructive Surgery | Houston, TX |
| Dawid Schellingerhout, M.D. | Diagnostic Radiology | Houston, TX |
| Jason Schenkel, M.D. PH.D. | Pathology | Houston, TX |
| Joy K Schindler, NP | Nurse Practitioner | Houston, TX |
| Pamela J Schlembach, M.D. | Radiation Oncology | Houston, TX |
| Ellen J Schlette, M.D. | Pathology | Houston, TX |
| Erika L Schlette, PA | Physician Assistant | Houston, TX |
| Kathleen M Schmeler, M.D. | Gynecological Oncology | Houston, TX |
| Joo Schmidt, FNP | Nurse Practitioner | Houston, TX |
| Donald Schomer, M.D. | Diagnostic Radiology | Houston, TX |
| Laura M Schoonover, PA | Physician Assistant | Houston, 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