Updated October 2026

Radiation oncologists in San Francisco, CA

Radiation oncology
San Francisco, California

Radiation oncologists: 36
Linked to a hospital or group: 29
Hospitals with a radiation oncologist: 19
Medical groups with a radiation oncologist: 13
Practice at a hospital: 29

There are 36 radiation oncologists in San Francisco. UCSF Medical Group has the most, 24, and UCSF Helen Diller Medical Center at Parnassus Heights has the most affiliated radiation oncologists, 26. 17% finished medical school 30 or more years ago.

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San Francisco radiation oncologists, listed A to Z by last name

Each radiation oncologist on the list has radiation oncology as their primary specialty and a San Francisco practice address. The list shows the NPI, and how many hospitals and medical groups each one practices with. A free account names every hospital and group, with validated contacts.

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San Francisco radiation oncologists, A to Z
Radiation oncologist	Hospitals	Medical groups	Email and phone
Roy Eugene Abendroth, MDNPI 1811988421	4 hospitals	2 groups	Contacts
Moshiur Mekhail Anwar, MD, PhDNPI 1215161211	1 hospital	3 groups	Contacts
Lauren Christine Boreta, MDNPI 1679990071	3 hospitals	3 groups	Contacts
Steve Braunstein, MD, PhDNPI 1760610141	2 hospitals	3 groups	Contacts
Jason Wing-Hong Chan, MDNPI 1033536917	2 hospitals	3 groups	Contacts
William Cheng Chen, MDNPI 1417452251	4 hospitals	2 groups	Contacts
Jessica J. ChewNPI 1508391731	1 hospital	3 groups	Contacts
Nam Woo Cho, MD, PhDNPI 1811420052	2 hospitals	3 groups	Contacts
Hailey Hye-In Choi, MDNPI 1386900249	3 hospitals	5 groups	Contacts
Mary Uan-Sian Feng, MDNPI 1720106693	1 hospital	3 groups	Contacts
Shannon Elizabeth Fogh, MDNPI 1265614838	2 hospitals	3 groups	Contacts
Barbara L. Fowble, MDNPI 1881623866	-	-	Contacts
Alexander B. Geng, MDNPI 1790066090	4 hospitals	1 group	Contacts
Alexander R. Gottschalk, MDNPI 1790728137	2 hospitals	3 groups	Contacts
Julian C. Hong, MD, MSNPI 1235540469	3 hospitals	3 groups	Contacts
I-Chow Joe Hsu, MDNPI 1144263039	1 hospital	3 groups	Contacts
David Gregory Kornguth, MDNPI 1801820394	4 hospitals	2 groups	Contacts
John W. Lee, MDNPI 1316938657	4 hospitals	2 groups	Contacts
John Leslie Meyer, MDNPI 1164403416	-	-	Contacts
Kavita Kacholia Mishra, MD, MPHNPI 1568640076	1 hospital	2 groups	Contacts
Jean L. Nakamura, MDNPI 1154369551	1 hospital	3 groups	Contacts
Catherine C. Park, MDNPI 1205878360	1 hospital	3 groups	Contacts
Nicolas Demetrios Prionas, MD, PhDNPI 1972840361	1 hospital	3 groups	Contacts
David Ronan Raleigh, MD, PhDNPI 1437424793	1 hospital	3 groups	Contacts
Mark Carlton Rounsaville, MDNPI 1033100284	-	-	Contacts
Rachel Sabol, MD, PhDNPI 1497331284	-	-	Contacts
Patricia L. Seid, MDNPI 1710994520	4 hospitals	1 group	Contacts
Steven Neema Seyedin, MDNPI 1134513450	4 hospitals	5 groups	Contacts
Lisa SingerNPI 1457619652	1 hospital	5 groups	Contacts
Matthew Susko, MDNPI 1215399811	4 hospitals	4 groups	Contacts
Harish Vasudevan, MD, PhDNPI 1215460753	1 hospital	3 groups	Contacts
William M. Wara, MDNPI 1831131754	-	-	Contacts
Anthony C. Wong, MD, PhDNPI 1285991430	5 hospitals	3 groups	Contacts
Sue Sun Yom, MD, PhDNPI 1821295833	3 hospitals	3 groups	Contacts

The list shows the 34 radiation oncologists with a public profile. The other 2 are counted in the total and searchable with a free account.

Sources: NPPES NPI Registry (CMS) and Dmand AI Affiliation Data

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Dmand AI has the EHR for 36 of 36 San Francisco radiation oncologists, at their hospital and their practice. Filter by Epic, Oracle Health, MEDITECH, athenahealth and more, then reach them with validated work emails and mobile numbers.

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UCSF Medical Group has the most radiation oncologists in San Francisco, with 24

UCSF Pediatrics is second with 24, and UCSF Pediatrics third with 21. Counts are radiation oncologists with a California address linked to each group.

Medical groups with the most radiation oncologists in San Francisco
#	Medical group	Parent organization	Radiation oncologists
1	UCSF Medical GroupSan Francisco	Parent on file	24
2	UCSF PediatricsSan Francisco	Parent on file	24
3	UCSF PediatricsSan Francisco	Parent on file	21
4	Advanced Radiology and Interventional Associates (ARIA), Inc.Modesto	-	3
5	Palo Alto Foundation Medical GroupPalo Alto	Parent on file	2
6	Marin Hospitalist Medical GroupGreenbrae	-	1
7	San Francisco Public Health LaboratorySan Francisco	Parent on file	1
8	Unio Specialty Care, Urology, Encinitas (formerly Genesis Healthcare Partners)Encinitas	Parent on file	1
9	UCI Health PhysiciansOrange	Parent on file	1
10	Golden Gate UrologySan Francisco	-	1

Top 10 of 13 San Francisco medical groups with a radiation oncologist

Sources: Dmand AI Affiliation Data and Dmand AI Org Hierarchy Data

UCSF Helen Diller Medical Center at Parnassus Heights has the most affiliated radiation oncologists in San Francisco, with 26

Zuckerberg San Francisco General Hospital and Trauma Center is second with 8, and California Pacific Medical Center Van Ness Campus third with 5. San Francisco radiation oncologists are affiliated with 19 hospitals in all.

Hospitals with the most radiation oncologists in San Francisco
#	Hospital	Health system	Radiation oncologists
1	UCSF Helen Diller Medical Center at Parnassus HeightsSan Francisco	University of California Health	26
2	Zuckerberg San Francisco General Hospital and Trauma CenterSan Francisco	City and County of San Francisco, CA	8
3	California Pacific Medical Center Van Ness CampusSan Francisco	Sutter Health	5
4	UCSF Langley Porter Psychiatric HospitalSan Francisco	University of California Health	5
5	California Pacific Medical Center Mission Bernal Campus & Orthopedic InstituteSan Francisco	Sutter Health	4
6	California Pacific Medical Center Davies CampusSan Francisco	Sutter Health	3
7	MarinHealth Medical CenterGreenbrae	Marin Healthcare District	3
8	Washington HealthFremont	Washington Health	2
9	Chinese HospitalSan Francisco	Chinese Hospital	2
10	Enloe HealthChico	Enloe Health	1

Top 10 of 19 San Francisco hospitals with an affiliated radiation oncologistAll 13 San Francisco hospitals

See every hospital and group for each San Francisco radiation oncologist

Each public profile names one place a radiation oncologist practices. A free account shows all of them, with the employer, the EHR and validated contacts.

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Source: Dmand AI Affiliation Data

Most San Francisco radiation oncologists practice at a hospital: 29 of the 29 with a mapped site

19 also practice at a medical group site. A radiation oncologist can practice at several kinds of site, so the shares overlap.

San Francisco radiation oncologists by site of care

Hospitals29100%
Medical group practices1966%

Sources: Dmand AI Affiliation Data and Dmand AI Practice Data

17% of San Francisco radiation oncologists finished medical school 30 or more years ago

5 of the 29 San Francisco radiation oncologists with a graduation year on file. 4 graduated in the last 10 years.

Physicians by years since medical school

Under 10 years ago414%
10 to 19 years ago1345%
20 to 29 years ago724%
30 to 39 years ago414%
40 or more years ago13%

Source: Dmand AI Professional Profile Data

Every San Francisco radiation oncologist profile shows current hospitals and groups, Medicare activity and NPI details

Primary practiceThe main place they practice, with its type and cityOn every profile
Every site of careEach hospital, clinic and group where they practice nowWith a free account
EmployerThe organization they work for, when one is on fileWith a free account
Medicare servicesServices and procedure codes billed to Medicare, from CMSOn every profile
Medicare Part D prescribingClaims and drug costs from Part D, from CMSOn every profile
Industry paymentsPayments from drug and device makers, from CMS Open PaymentsOn every profile
Publications and clinical trialsResearch papers and trials linked to the NPI, when on fileOn every profile
Licenses and graduation yearState license numbers and medical school graduation yearOn every profile
NPI detailsNPI, enumeration date, primary taxonomy and practice addressOn every profile
Work email and mobile numberFound on request through healthcare waterfall enrichment, then validatedWith a free account
EHR in useThe EHR at each site where they practiceWith a free account
Colleagues at each siteThe clinicians they work with at each hospital and groupWith a free account

Free account: 30 days free, self-serve, no credit card.

Sources: NPPES NPI Registry (CMS), Medicare Physician & Other Practitioners (CMS), Open Payments (CMS) and Dmand AI Affiliation Data

Sources for the San Francisco radiation oncologist directory

Sources for the data on this page
Data on this page	Source
HCPs, types and specialties	NPPES NPI Registry (CMS) and Dmand AI Professional Profile Data
Sites of care, hospitals and medical groups	Dmand AI Affiliation Data
Medical school graduation year	Dmand AI Professional Profile Data

Data last refreshed October 2026Report an inaccuracy Remove my information

Radiation oncologists are HCPs whose primary specialty is radiation oncology (taxonomy code 2085R0001X), with an active NPI and a San Francisco practice address.

FAQ

Frequently asked questions about radiation oncologists in San Francisco

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

How many radiation oncologists are in San Francisco?

36 radiation oncologists have an active NPI, a San Francisco practice address and radiation oncology (taxonomy code 2085R0001X) as their primary specialty. 29 of them are linked to a hospital or medical group.

Which San Francisco medical groups have the most radiation oncologists?

UCSF Medical Group, with 24, followed by UCSF Pediatrics with 24 and UCSF Pediatrics with 21.

Which San Francisco hospitals have the most radiation oncologists?

UCSF Helen Diller Medical Center at Parnassus Heights, with 26 affiliated radiation oncologists, followed by Zuckerberg San Francisco General Hospital and Trauma Center with 8 and California Pacific Medical Center Van Ness Campus with 5.

What share of San Francisco radiation oncologists practice at a hospital?

29 of the 29 San Francisco radiation oncologists with a mapped site of care, or 100%, have a current hospital affiliation.

What is the taxonomy code for radiation oncology?

2085R0001X is the NPPES taxonomy code for radiation oncology. Sub-specialties with their own code are counted on their own lists.

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