Clinicians affiliated with Ucsf Medical Group Business Services

1,598 clinicians on file with this group · most practice in San Francisco-Oakland-Fremont, CA · PAC ID 3779497870

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

1,230 clinicians affiliated with Ucsf Medical Group Business Services are in the 2024 Medicare Part B data, 999 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 (137) · Diagnostic Radiology (106) · Internal Medicine (99) · Neurology (94) · Physician Assistant (56) · Cardiology (55) · Hematology-Oncology (55) · Family Practice (50) · Orthopedic Surgery (50) · Ophthalmology (41) · Neurosurgery (31) · Medical Oncology (30) · Gastroenterology (29) · Otolaryngology (29) · Nephrology (27) · Urology (27) · Obstetrics & Gynecology (26) · Optometry (26) · Dermatology (23) · General Surgery (23) · Endocrinology (19) · Pulmonary Disease (19) · Radiation Oncology (19) · Infectious Disease (17) · Psychiatry (15) · Rheumatology (14) · Hospitalist (12) · Geriatric Medicine (6) · Pediatric Medicine (6) · Physical Medicine and Rehabilitation (6) · Advanced Heart Failure and Transplant Cardiology (5) · Critical Care (Intensivists) (5) · Hematology (5) · Hospice and Palliative Care (5) · Interventional Radiology (5) · Psychologist, Clinical (5) · Vascular Surgery (5) · Allergy/ Immunology (4) · Interventional Pain Management (4) · Plastic and Reconstructive Surgery (4) · Anesthesiology (3) · Clinical Cardiac Electrophysiology (3) · Gynecological Oncology (3) · Interventional Cardiology (3) · Adult Congenital Heart Disease (2) · Audiologist (2) · Pain Management (2) · Pathology (2) · Physical Therapist in Private Practice (2) · Podiatry (2) · Sleep Medicine (2) · Thoracic Surgery (2) · Colorectal Surgery (Proctology) (1) · Emergency Medicine (1) · Hand Surgery (1) · Micrographic Dermatologic Surgery (1) · Nuclear Medicine (1) · Oral Surgery (Dentist only) (1) · Sports Medicine (1) · Undefined Physician type (1)

Specialty links go to the specialty in San Francisco-Oakland-Fremont, CA.

Clinicians affiliated with Ucsf Medical Group Business Services, 2024

Alphabetical by last name; 801–900 of 1,230.

NameSpecialtyCity
Laurie L Nguyen, AGACNP-BCNurse PractitionerSan Francisco, CA
Tien T Nguyen, PA-CPhysician AssistantSan Francisco, CA
Tung T Nguyen, MDInternal MedicineSan Francisco, CA
Hailyn NielsenRheumatologySan Francisco, CA
Rita Nieu, OD, MSOptometrySan Francisco, CA
Cheikh Njie, MDGastroenterologySan Francisco, CA
Daniel H Null, MDInternal MedicineSan Francisco, CA
Uchenna A NwosuInternal MedicineOakland, CA
Alyssa NylanderNeurologySan Francisco, CA
Nancy Ann E Oberheim Bush, M.D. PH.D.NeurologySan Francisco, CA
Anobel Y Odisho, MDUrologySan Francisco, CA
Mimi Ogawa, M.D.Family PracticeSacramento, CA
Onyinye C Ogee-NwankwoNurse PractitionerDaly City, CA
Michael OhligerDiagnostic RadiologyBoston, MA
Ross A Okimoto, M.DInternal MedicineBoston, MA
Megumi J Okumura, M.D.Pediatric MedicineSan Francisco, CA
Kelly Olcott, AGPCNP-BCNurse PractitionerSan Mateo, CA
Rebecca Olin, MDHematology-OncologySan Francisco, CA
Devin A Oller, MDInternal MedicineLexington, KY
Lawrence M Oloff, MDPodiatryDaly City, CA
Natalie R Olsen, NPNurse PractitionerSan Francisco, CA
Kirstina M Olson, M.D.Orthopedic SurgerySan Francisco, CA
Conor W O'Neill, M.D.Interventional Pain ManagementSan Francisco, CA
Marina Ortega, PHYSICIAN ASSISTANTPhysician AssistantPetaluma, CA
Idelisse Ortiz Torres, MD PHDNeurologySan Francisco, CA
Maria S Ortiz Urda, M.DDermatologyStanford, CA
Jennifer Osborn, APRNNurse PractitionerSanta Cruz, CA
Jonathan Ostrem, M.D., PH.D.Hematology-OncologyBoston, MA
Iris M Otani, M.D.Internal MedicineSan Francisco, CA
Yvonne Ou, M.D.OphthalmologyDurham, NC
Justin O Oveyssi, D.O.NephrologyWest Hollywood, CA
Tyler Padgett, D.O.Family PracticeSan Francisco, CA
Sriranjani P Padmanabhan, M.D.OphthalmologySan Francisco, CA
Caitlyn E Painter, D.O.Obstetrics & GynecologySan Francisco, CA
Darren PanHematology-OncologySan Francisco, CA
Elizabeth PanHematology-OncologyLos Angeles, CA
Judong Pan, M.D.Diagnostic RadiologySan Francisco, CA
Rutvij P Pandya, MDFamily PracticeSan Francisco, CA
Mercedes Paredes, MD, PHDNeurologySan Francisco, CA
Neeti B Parikh, MDOphthalmologySan Francisco, CA
Andrea ParkOtolaryngologyLos Angeles, CA
Han Myoung Park, DOFamily PracticeGeneva, IL
James Park, MDFamily PracticeSan Francisco, CA
Meyeon Park, MDNephrologySan Francisco, CA
Michael K Park, MDPhysical Medicine and RehabilitationOakland, CA
Charles B Parks, D.P.M.PodiatrySan Francisco, CA
Leslie M Parnell, NPNurse PractitionerSan Francisco, CA
Neel D Pasricha, M.D.OphthalmologySan Francisco, CA
Sravya PatnalaFamily PracticeLos Angeles, CA
Lauren PatrickNeurologySan Francisco, CA
Atrejo Patridge, N.P.Nurse PractitionerSan Francisco, CA
Sarah L PattersonInternal MedicineSan Francisco, CA
Sophie Patzek, M.D,EndocrinologySan Diego, CA
Pritikanta Paul, MDNeurologySan Francisco, CA
Geraldine Pavez, ACNPNurse PractitionerLos Angeles, CA
Ivy Paw, MDFamily PracticeSan Francisco, CA
Alyson E PelayoNurse PractitionerSan Francisco, CA
Tracy J Peng, MDPsychiatrySan Francisco, CA
Alyssa A Perez, M.D.Pulmonary DiseaseBoston, MA
Jennifer Perkins, MDEndocrinologySan Francisco, CA
Douglas B PetNeurologySan Francisco, CA
Mary Petrofsky, NPNurse PractitionerSan Francisco, CA
Michele N Pham, M.D.Allergy/ ImmunologySan Francisco, CA
Darcy Phelan, RN, NPNurse PractitionerSan Francisco, CA
Lauren Phinney, MDInternal MedicineSan Francisco, CA
Sorbarikor Piawah, M.D.Medical OncologyBoston, MA
Michael Pico, MDPain ManagementSan Francisco, CA
Logan PierceHospitalistLos Angeles, CA
James PirruccelloCardiologySan Francisco, CA
Samuel J Pleasure, M.D.NeurologySan Francisco, CA
Brandon Pleman, MDFamily PracticeSan Mateo, CA
Steven D Pletcher, M.D.OtolaryngologySan Francisco, CA
Liina Poder, M.D.Diagnostic RadiologySan Francisco, CA
Lealah Pollock, M.D., M.S.Family PracticeSan Francisco, CA
Jason H Pomerantz, M.D.Plastic and Reconstructive SurgerySan Francisco, CA
Lawrence R Poree, MDInterventional Pain ManagementSan Francisco, CA
Paula A Porras Rodriguez, MDGeneral SurgerySan Francisco, CA
Sima P Porten, M.DUrologySan Francisco, CA
Andrew M Posselt, MDGeneral SurgerySan Francisco, CA
Merve Postalcioglu, MDNephrologySan Francisco, CA
Michael B Potter, M.D.Family PracticeSan Francisco, CA
Daniel R Pound, M.D.Family PracticeSan Francisco, CA
Michael Pourdehnad, MDHematology-OncologyNew York, NY
Pooja Prasad, MDAdvanced Heart Failure and Transplant CardiologySan Francisco, CA
Mukund Premkumar, MDFamily PracticeSan Francisco, CA
Elissa R Price, M.D.Diagnostic RadiologySan Francisco, CA
Jennifer C Price, MDGastroenterologySan Francisco, CA
Atif Qasim, MDCardiologySan Francisco, CA
Zoe E Quandt, M.D.EndocrinologySan Francisco, CA
Michael W Rabow, MDInternal MedicineSan Francisco, CA
James A Radford, DO, DCFamily PracticeLas Vegas, NV
Govind RaghavanPsychiatrySan Francisco, CA
Kesav RaghavanDiagnostic RadiologySan Jose, CA
Sophia Rahman, M.D.Radiation OncologyPleasant Hill, CA
David R Raleigh, M.D., PH.D.Radiation OncologySan Francisco, CA
Jeffrey W Ralph, M.D.NeurologySan Francisco, CA
Radhika A Ramanan, M.D, M.P.H.Internal MedicineSan Francisco, CA
Saraswathy Ramanathan, M.D.OphthalmologySan Francisco, CA
Faustine D Ramirez, M.D.Pediatric MedicineSan Francisco, CA
Olga Ramm, MDObstetrics & GynecologyOakland, CA

Practice locations

Listed practice locations in California.

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