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, 51 to 100
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
51	Solano Diagnostics ImagingFairfield · 37 sites	-	77	81	Decision makers
52	Fullerton Radiology Medical GroupAnaheim · 43 sites	-	76	80	Decision makers
53	St. Jude Radiology Medical Group, Inc.Fullerton · 63 sites	-	76	77	Decision makers
54	Adventist Health St. HelenaSaint Helena · 4 sites	Parent on file	74	120	Decision makers
55	United Medical Imaging HealthcareDowney · 41 sites	Parent on file	74	82	Decision makers
56	Eisenhower Radiology Medical GroupRancho Mirage · 97 sites	-	74	78	Decision makers
57	Southern Inyo HospitalLone Pine · 3 sites	Parent on file	70	80	Decision makers
58	I V Radiology Medical GroupBrawley · 44 sites	-	69	70	Decision makers
59	San Diego Imaging (SDI) Medical GroupCoronado · 26 sites	-	67	72	Decision makers
60	Newport Imaging CenterNewport Beach · 7 sites	-	66	75	Decision makers
61	Cedars-Sinai Imaging Medical GroupWest Hollywood · 4 sites	Parent on file	66	69	Decision makers
62	KC Tan MD Medical CorporationMonterey Park · 29 sites	Parent on file	65	69	Decision makers
63	Washington Health Medical GroupFremont · 72 sites	Parent on file	65	67	Decision makers
64	Delta Radiology Medical Group, Inc.Lodi · 16 sites	Parent on file	65	66	Decision makers
65	San Antonio Radiological Medical GroupUpland · 58 sites	-	58	59	Decision makers
66	Newport Harbor Radiology AssociatesNewport Beach · 11 sites	-	57	71	Decision makers
67	Tower Imaging Medical GroupLos Angeles · 63 sites	-	57	57	Decision makers
68	X-Ray Medical GroupLa Mesa · 43 sites	Parent on file	57	57	Decision makers
69	Adventist Health Mendocino CoastFort Bragg · 3 sites	Parent on file	56	74	Decision makers
70	Pueblo Radiology Medical GroupSanta Barbara · 49 sites	-	56	60	Decision makers
71	Keck Medicine of USC Imaging Center in PasadenaPasadena · 4 sites	Parent on file	53	59	Decision makers
72	Advanced Medical ImagingFresno · 10 sites	Parent on file	53	57	Decision makers
73	Claremont Imaging AssociatesPomona · 7 sites	Parent on file	53	55	Decision makers
74	Palms Imaging CenterOxnard · 10 sites	Parent on file	52	53	Decision makers
75	HALO Medical GroupIndian Wells · 22 sites	Parent on file	50	56	Decision makers
76	Placerville Radiology Medical GroupPlacerville · 65 sites	Parent on file	50	51	Decision makers
77	Radiology Associates of San Luis ObispoTempleton · 42 sites	-	49	53	Decision makers
78	The Hill Medical CorporationArcadia · 50 sites	Parent on file	47	50	Decision makers
79	RadiologicaSan Andreas · 31 sites	-	47	48	Decision makers
80	San Diego Imaging Medical GroupChula Vista · 3 sites	-	46	46	Decision makers
81	SoHum Health - Jerold Phelps Community HospitalGarberville · 3 sites	Parent on file	45	59	Decision makers
82	Contra Costa OncologyWalnut Creek · 4 sites	-	44	53	Decision makers
83	Radiology Medical GroupLos Angeles · 22 sites	Parent on file	44	47	Decision makers
84	RadX Imaging PartnersHollister · 54 sites	Parent on file	44	44	Decision makers
85	Mayers Memorial Healthcare DistrictFall River Mills · 4 sites	Parent on file	43	55	Decision makers
86	Advanced Imaging of South BayTorrance · 6 sites	-	40	40	Decision makers
87	Tower Imaging Medical GroupSanta Monica · 7 sites	-	40	40	Decision makers
88	Chemehuevi Health ClinicHavasu Lake · 3 sites	Parent on file	39	42	Decision makers
89	San Diego Imaging Medical GroupSan Diego · 3 sites	-	37	37	Decision makers
90	Moran, Rowen & Dorsey (MRD Imaging)Orange · 16 sites	Parent on file	35	39	Decision makers
91	Los Angeles Radiology Medical AssociatesGlendale · 7 sites	-	33	33	Decision makers
92	Kennewick Radiology GroupSan Marino · 46 sites	-	32	32	Decision makers
93	Redwood Regional Medical GroupSanta Rosa · 6 sites	-	32	32	Decision makers
94	Sol RadiologyVictorville · 16 sites	Parent on file	30	30	Decision makers
95	Inview ImagingAntioch · 9 sites	-	29	30	Decision makers
96	Plumas District HospitalQuincy · 2 sites	Parent on file	28	52	Decision makers
97	Unified HealthValencia · 4 sites	-	27	42	Decision makers
98	Orange County Heart InstituteOrange · 3 sites	-	27	29	Decision makers
99	The Hill MedicalArcadia · 8 sites	Parent on file	26	26	Decision makers
100	UCLA Radiation OncologyLos Angeles · 8 sites	Parent on file	25	32	Decision makers

Showing 51 to 100 of 266 radiology and imaging groups in California

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

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