Updated October 2026

Largest radiology and imaging groups in California

Medical group directory
California
Radiology and imaging

Groups: 266
Radiology groups: 264
Radiology specialists: 2,774
Physicians: 4,834
More than one site: 210

There are 266 radiology and imaging groups in California with a Medicare PAC ID. Beverly Radiology Medical Group is the largest, with 402 physicians.

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Beverly Radiology Medical Group is the largest radiology and imaging group in California, with 402 physicians

Ranked by physicians with a California address linked to each group. Martin Luther King Jr. Community Medical Group is second with 390, and Kern Medical third with 367. 32 California groups have 100 or more physicians.

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Radiology and imaging groups in California, ranked by physicians
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1	Beverly Radiology Medical GroupLos Angeles · 209 sites	Parent on file	402	413	Decision makers
2	Martin Luther King Jr. Community Medical GroupLos Angeles · 22 sites	Parent on file	390	463	Decision makers
3	Kern MedicalBakersfield · 53 sites	Parent on file	367	534	Decision makers
4	Chico Hospitalist GroupChico · 37 sites	-	325	489	Decision makers
5	Desert Advanced ImagingLos Angeles · 98 sites	Parent on file	298	305	Decision makers
6	San Fernando Valley Interventional Radiology & Imaging CenterLos Angeles · 47 sites	Parent on file	264	271	Decision makers
7	Fresno Imaging CenterLos Angeles · 58 sites	Parent on file	252	259	Decision makers
8	Pronet Imaging Medical GroupLos Angeles · 40 sites	Parent on file	250	255	Decision makers
9	NorCal ImagingLos Angeles · 56 sites	Parent on file	247	254	Decision makers
10	UCLA Entertainment Industry Medical GroupLos Angeles · 22 sites	Parent on file	239	269	Decision makers
11	Modesto Advanced Imaging CenterLos Angeles · 36 sites	Parent on file	236	241	Decision makers
12	Diagnostic Radiological Imaging - SacramentoSacramento · 35 sites	Parent on file	235	240	Decision makers
13	Santa Rosa Imaging Medical CenterLos Angeles · 20 sites	Parent on file	234	239	Decision makers
14	Kern RadiologyBakersfield · 42 sites	Parent on file	230	233	Decision makers
15	RadNet Medical Imaging - San FranciscoSan Francisco · 32 sites	Parent on file	225	229	Decision makers
16	Adventist Health ReedleyReedley · 15 sites	Parent on file	205	298	Decision makers
17	UCLA Medical Group (UCLA Health)Los Angeles · 45 sites	Parent on file	203	243	Decision makers
18	Renaissance Imaging Medical AssociatesNorthridge · 142 sites	Parent on file	199	203	Decision makers
19	Adventist Health Lodi MemorialLodi · 11 sites	Parent on file	168	198	Decision makers
20	UCI Department of Radiological SciencesOrange · 9 sites	Parent on file	167	173	Decision makers
21	Bay Imaging ConsultantsWalnut Creek · 100 sites	-	165	183	Decision makers
22	Silicon Valley Diagnostic Imaging (SVDI)Mountain View · 102 sites	Parent on file	157	159	Decision makers
23	Mee Memorial Healthcare SystemKing City · 4 sites	Parent on file	146	183	Decision makers
24	Adventist Health Tehachapi ValleyTehachapi · 4 sites	Parent on file	145	162	Decision makers
25	Adventist Health BakersfieldBakersfield · 5 sites	Parent on file	139	163	Decision makers
26	Magnetic Imaging AffiliatesOakland · 20 sites	-	120	127	Decision makers
27	Modesto Radiological Medical GroupTracy · 101 sites	-	116	121	Decision makers
28	Focus Medical ImagingMonrovia · 82 sites	Parent on file	116	118	Decision makers
29	VituityEmeryville · 68 sites	Parent on file	111	119	Decision makers
30	John Muir Health Magnetic Imaging CenterWalnut Creek · 41 sites	Parent on file	111	116	Decision makers
31	Adventist Health HanfordHanford · 5 sites	Parent on file	104	117	Decision makers
32	Adventist Health Clear LakeClearlake · 8 sites	Parent on file	103	188	Decision makers
33	Adventist Health Delano Medical CenterDelano · 3 sites	Parent on file	95	111	Decision makers
34	Torrance Memorial Medical CenterTorrance · 8 sites	Parent on file	95	102	Decision makers
35	Sol RadiologyVictorville · 96 sites	Parent on file	95	95	Decision makers
36	Trinity HospitalWeaverville · 3 sites	Parent on file	94	126	Decision makers
37	Lompoc Valley Medical CenterLompoc · 8 sites	Parent on file	93	123	Decision makers
38	CMI Radiology GroupFresno · 38 sites	-	92	99	Decision makers
39	Adventist Health TulareTulare · 1 site	Parent on file	89	98	Decision makers
40	Valley Radiology ImagingSan Jose · 16 sites	Parent on file	89	95	Decision makers
41	West Valley Radiology GroupWest Hills · 53 sites	-	89	90	Decision makers
42	Prima Medical GroupNovato · 38 sites	Parent on file	88	97	Decision makers
43	Adventist Health and RideoutMarysville · 17 sites	Parent on file	87	112	Decision makers
44	RADS, Inc.Manteca · 95 sites	-	80	84	Decision makers
45	Adventist Health Howard MemorialWillits · 4 sites	Parent on file	79	113	Decision makers
46	Lambert Radiology Medical GroupWhittier · 16 sites	Parent on file	79	94	Decision makers
47	Advanced Radiology and Interventional Associates (ARIA)Modesto · 47 sites	-	79	92	Decision makers
48	Los Alamitos Radiology GroupLos Alamitos · 67 sites	Parent on file	79	81	Decision makers
49	Oroville HospitalOroville · 40 sites	Parent on file	78	120	Decision makers
50	Imaging Healthcare SpecialistsSan Diego · 48 sites	Parent on file	78	81	Decision makers

Showing 1 to 10 of 266 radiology and imaging groups in California

Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data

Adventist Health has the most physicians in California radiology and imaging groups, with 706 across 14 groups

Dmand AI maps every medical group to its parent organization, up to the health system or platform at the top. 23 parent organizations have two or more California radiology and imaging groups. Each clinician counts once per parent organization.

Parent organizations with the most California radiology and imaging groups
#	Parent organization	California groups	Physicians	HCPs
1	Adventist HealthHealth system	14	706	1,080
2	RadNetTreatment center company	17	584	605
3	Beverly Radiology Medical GroupPhysician staffing company	3	490	502
4	University of California HealthAcademic health system	4	331	410
5	Radiology PartnersPhysician practice platform	2	312	317
6	UC IrvineAcademic health system	2	191	200
7	Cedars-Sinai Health SystemHealth system	3	161	171
8	VituityPhysician staffing company	2	148	157
9	Sol RadiologyOutpatient facility	4	95	95
10	Lompoc Valley Medical CenterHealth system	2	94	124

Top 10 of 23 parent organizations with two or more California groups

Adventist HealthHealth system · 14 California radiology and imaging groups
Adventist Health ReedleyMulti-specialty group · Reedley
Adventist Health Lodi MemorialMulti-specialty group · Lodi
12 more California groups and their practice sites

See every medical group, site and clinician under Adventist Health

Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.

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Source: Dmand AI Org Hierarchy Data

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40% of California radiology and imaging groups are independent, with no larger parent organization

A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.

California radiology and imaging groups by ownership

Independent10740%
Health system or hospital5922%
Platform or corporate owner208%
Community or government62%
Other organization7428%

Sites of care beyond their own offices

Practice at a hospital163

Practice at a surgery center14

Practice at a rural health clinic9

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Source: Dmand AI Org Hierarchy Data

163 California radiology and imaging groups practice at a hospital site, and 14 at a surgery center

Sites of care linked to each group in the org hierarchy, beyond its own offices. A group can practice at several kinds of site.

California radiology and imaging groups by site of care

Hospitals16361%
Ambulatory surgery centers145%
Rural health clinics93%
FQHCs42%
Skilled nursing facilities21%
Hospices11%
Behavioral health facilities11%

Clinicians in California radiology and imaging groups

Radiology specialists2,774

All HCPs6,171

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

Los Angeles has the most radiology and imaging groups in California, with 20

20radiology and imaging groups in Los Angeles

8radiology and imaging groups in Newport Beach

6radiology and imaging groups in Bakersfield

6radiology and imaging groups in Fresno

5radiology and imaging groups in Beverly Hills

5radiology and imaging groups in Orange

More California cities with radiology and imaging groups

Fremont4
Glendale4
Mission Viejo4
Redding4
San Diego4
San Francisco4
San Jose4
Torrance4
Victorville4
Walnut Creek4
Anaheim3
Arcadia3
Long Beach3
Modesto3
Monterey Park3

Source: Doctors and Clinicians National Downloadable File (CMS)

Each California radiology and imaging group profile shows the parent, sites, clinicians and identifiers

Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
Parent organizationThe health system, platform or owner above the groupOn every profile
Every clinician and siteThe full roster and every practice locationWith a free account
Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account

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Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data

Sources for the California radiology and imaging group list

Sources for the data on this page
Data on this page	Source
Medical groups, specialties and sites	Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data
Parent organizations and independence	Dmand AI Org Hierarchy Data
Physicians and HCPs	Dmand AI Affiliation Data
Group NPI and PAC ID	NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS)

Data last refreshed October 2026Report an inaccuracy Remove my information

Groups whose main specialty is radiology and imaging and that have a Medicare PAC ID.

FAQ

Frequently asked questions about radiology and imaging groups in California

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

How many radiology and imaging groups are in California?

There are 266 radiology and imaging groups in California with a Medicare PAC ID. Between them they have 2,774 radiology specialists.

Which companies own the most radiology and imaging groups?

By physicians, Adventist Health, with 706 across 14 groups, followed by RadNet with 584 and Beverly Radiology Medical Group with 490.

How many California radiology and imaging groups are independent?

107, or 40%, have no larger parent organization in the Dmand AI org hierarchy. 59 belong to a health system or hospital and 20 to a physician platform or corporate owner.

Why are radiology and imaging listed together?

They share one specialty category in the Dmand AI medical group data. Each group is listed under its main specialty.

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