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; 1,101–1,200 of 1,230.

NameSpecialtyCity
Adrian TomesFamily PracticeSan Francisco, CA
Paul A Toogood, M.D.Orthopedic SurgerySan Francisco, CA
Ana Marie Torres, M.S., NPNurse PractitionerSan Francisco, CA
Shawn L Torres, MDInternal MedicineSan Francisco, CA
Brian D Toyota, MDNeurosurgerySan Jose, CA
Janna Traeger, NPNurse PractitionerSan Francisco, CA
Jennifer L Tran, ODOptometrySan Francisco, CA
Ngoc-Anh Tran, M.D.Diagnostic RadiologySan Francisco, CA
Kimberly Trinh, AG-ACNPNurse PractitionerStanford, CA
Katy K Tsai, MDInternal MedicineSan Francisco, CA
Lulu R TsaoCritical Care (Intensivists)San Francisco, CA
Zian H Tseng, M.D.CardiologySan Francisco, CA
Amy R Tso, M.D.NeurologySan Francisco, CA
Joanna H Tu, M.D.DermatologySan Francisco, CA
Madina TugizovaNeurologySan Francisco, CA
Sirisha K Tummala, MDHospitalistSan Mateo, CA
Michael A Turken, MDInternal MedicineStanford, CA
Mary J TurocyFamily PracticeSan Jose, CA
David T Tzou, M.D.UrologySan Francisco, CA
Stefanie M Ueda, M.D.Obstetrics & GynecologySan Francisco, CA
John I Umekubo, MDInternal MedicineSan Francisco, CA
Kudret I Usmani, MDOrthopedic SurgerySan Francisco, CA
Jackeline P Vajta Gomez, MDHospitalistSan Francisco, CA
Liza Valdivia, M.D.Infectious DiseaseSan Francisco, CA
Lawren A Vandevrede, MD, PHDNeurologyBoston, MA
Michelle E Van Kuiken, M.D.UrologyLos Angeles, CA
Katherine Vanloon, MD MPHMedical OncologySan Francisco, CA
Jennifer M Van Warmerdam, M.D.Orthopedic SurgerySan Francisco, CA
Laalasa Varanasi, M.D.NephrologySan Francisco, CA
Vasanth Vedantham, M.D., PH.D.CardiologySan Francisco, CA
Ana I Velazquez Manana, MD MSCMedical OncologySan Francisco, CA
Maya Vella, MDDiagnostic RadiologySan Francisco, CA
Aida A Venado Estrada, MDPulmonary DiseaseSan Francisco, CA
Javier Villanueva-MeyerDiagnostic RadiologySan Francisco, CA
Jyotsna S Vincent, MDInternal MedicineLos Gatos, CA
Susan M Voglmaier, MD PHDPsychiatrySan Francisco, CA
Monica Volz, N.P.Nurse PractitionerSan Francisco, CA
Elham Vosoughi, M.D.Hematology-OncologySan Mateo, CA
Natalia WagnerNurse PractitionerSan Francisco, CA
Katherine C Wai, MDOtolaryngologyStanford, CA
Greer E Waldrop, MDNeurologyNew York City, NY
Evan WalkerHematology-OncologySan Francisco, CA
Judith M Walsh, MDInternal MedicineSan Francisco, CA
Nathan R Walsh, PA-CPhysician AssistantSan Francisco, CA
Maria A Wamsley, M.D.Internal MedicineSan Francisco, CA
Bruce M Wang, M.D.Internal MedicineSan Francisco, CA
Connie W WangGastroenterologySan Francisco, CA
Doris D Wang, M.D., PH.DNeurosurgerySan Francisco, CA
Kang Wang, MDDiagnostic RadiologyStanford, CA
Qing Wang, M.D., PH.D.OphthalmologySan Francisco, CA
Victoria E Wang, M.D., PHDHematology-OncologySan Francisco, CA
Yingbing Wang, MDDiagnostic RadiologySan Francisco, CA
Zhen J Wang, MDDiagnostic RadiologySan Francisco, CA
Derek T Ward, M.D.Orthopedic SurgerySan Francisco, CA
Tracy A Ward, AGACNP-BCNurse PractitionerSan Francisco, CA
Cynthia WashburnPhysician AssistantLos Angeles, CA
Samuel L Washington, MD, MASUrologySan Francisco, CA
Clifton Watt, M.D.CardiologyBerkeley, CA
Emmanuelle L Waubant, M.D.NeurologySan Francisco, CA
Maggie W Waung, M.D., PH.D.NeurologySan Francisco, CA
Elizabeth M Wayne, N.P.Nurse PractitionerSan Francisco, CA
Emily M Webb, M.D.Diagnostic RadiologySan Francisco, CA
Allison B Webber, M.D.NephrologySan Francisco, CA
Robert J Weber, MD, PHDInternal MedicinePalo Alto, CA
Andrew Weeks, MD, DDSOral Surgery (Dentist only)San Francisco, CA
Maria L Wei, M.D., PH.D.DermatologySan Francisco, CA
Joshua Wendling, PA-CPhysician AssistantWestchester, IL
Kelly L Wentworth, MDInternal MedicineSan Francisco, CA
Christina Weyer Jamora, PHDPsychologist, ClinicalSan Francisco, CA
Adrian Whelan, MB BCH BAONephrologySan Francisco, CA
Sara Whetstone, MDObstetrics & GynecologySan Francisco, CA
Anna WilcoxonNurse PractitionerPalo Alto, CA
Katharine Willcoxon, NPNurse PractitionerSan Francisco, CA
Mia F Williams, MDInternal MedicineSan Francisco, CA
David M Wilson, M.D.Interventional RadiologySan Francisco, CA
Michael R Wilson, M.D.NeurologySan Francisco, CA
Charles C Windon, M.D.NeurologyPhiladelphia, PA
Ethan A Winkler, M.D., PH.D.NeurosurgerySan Francisco, CA
Bryan J Winn, M.D.OphthalmologyNew York, NY
Nadine Wlasiuk, APRN,CPNP-PC, FNP-BCNurse PractitionerSan Francisco, CA
Linda L Wolbers, MDInterventional Pain ManagementCapitola, CA
Jeffrey L Wolf, M.D.Hematology-OncologySan Francisco, CA
Libby Wolf, ACNP-BCNurse PractitionerPalo Alto, CA
Anthony C Wong, MD, PHDRadiation OncologySan Francisco, CA
Chelsea Wong, NPNurse PractitionerSan Francisco, CA
Cheston Wong, PA-CPhysician AssistantSan Francisco, CA
Nancy S Wong, RN, FNPNurse PractitionerSan Francisco, CA
Stacy N Wong, N.P.Nurse PractitionerSan Francisco, CA
Stephanie E Wong, M.D.Orthopedic SurgerySan Francisco, CA
Ong-Dee L Woods, NP, RNNurse PractitionerPalo Alto, CA
Sean WoolenDiagnostic RadiologySan Francisco, CA
Vanessa R Wormser, DOInfectious DiseaseSan Francisco, CA
I-Kung Wu, M.D., PH.D.Physical Medicine and RehabilitationSan Francisco, CA
Rita Wu, MDFamily PracticeSan Francisco, CA
Xin Wu, M.D.Diagnostic RadiologySan Francisco, CA
Rosanna L Wustrack, M.D.Orthopedic SurgeryYonkers, NY
Leah C Wylie, DPTPhysical Therapist in Private PracticeSan Francisco, CA
Mark C Xu, MDOrthopedic SurgerySan Francisco, CA
Mary Jue Xu, MDOtolaryngologySan Francisco, CA
Seiji Yamaguchi, M.D.General SurgerySan Francisco, 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