Updated October 2026

Medical groups in Los Angeles, CA

Medical group directory
Los Angeles, California

Medical groups: 584
Multi-specialty: 174
Single-specialty: 410
More than one site: 263
100+ physicians: 31

There are 584 medical groups in Los Angeles with a Medicare PAC ID. UC San Diego Health is the largest, with 2,139 California physicians, followed by Loma Linda University Faculty Medical Group (LLUFMG) with 1,723. 67% of Los Angeles groups are independent.

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UC San Diego Health is the largest medical group in Los Angeles, with 2,139 physicians

Ranked by physicians with a California address linked to each group based in Los Angeles. Loma Linda University Faculty Medical Group (LLUFMG) is second with 1,723, and Cedars-Sinai Medical Group third with 1,699. 31 Los Angeles groups have 100 or more physicians.

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Medical groups in Los Angeles, ranked by physicians
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1	UC San Diego HealthLos Angeles · 180 sites	Parent on file	2,139	3,019	Decision makers
2	Loma Linda University Faculty Medical Group (LLUFMG)Los Angeles · 160 sites	Parent on file	1,723	2,467	Decision makers
3	Cedars-Sinai Medical GroupLos Angeles · 144 sites	Parent on file	1,699	2,191	Decision makers
4	USC Care Medical GroupLos Angeles · 129 sites	Parent on file	1,551	2,402	Decision makers
5	UCLA Medical GroupLos Angeles · 128 sites	Parent on file	1,535	1,858	Decision makers
6	Optum - Downtown Los AngelesLos Angeles · 241 sites	Parent on file	1,499	2,238	Decision makers
7	Children's Hospital Los Angeles Medical GroupLos Angeles · 21 sites	Parent on file	1,054	1,252	Decision makers
8	Facey Medical GroupLos Angeles · 65 sites	Parent on file	513	741	Decision makers
9	Beverly Radiology Medical GroupLos Angeles · 209 sites	Parent on file	402	413	Decision makers
10	Martin Luther King Jr. Community Medical GroupLos Angeles · 22 sites	Parent on file	390	463	Decision makers
11	Desert Advanced ImagingLos Angeles · 98 sites	Parent on file	298	305	Decision makers
12	San Fernando Valley Interventional Radiology & Imaging CenterLos Angeles · 47 sites	Parent on file	264	271	Decision makers
13	UCLA HealthLos Angeles · 22 sites	Parent on file	263	342	Decision makers
14	Fresno Imaging CenterLos Angeles · 58 sites	Parent on file	252	259	Decision makers
15	Pronet Imaging Medical GroupLos Angeles · 40 sites	Parent on file	250	255	Decision makers
16	NorCal ImagingLos Angeles · 56 sites	Parent on file	247	254	Decision makers
17	UCLA Entertainment Industry Medical GroupLos Angeles · 22 sites	Parent on file	239	269	Decision makers
18	Modesto Advanced Imaging CenterLos Angeles · 36 sites	Parent on file	236	241	Decision makers
19	Santa Rosa Imaging Medical CenterLos Angeles · 20 sites	Parent on file	234	239	Decision makers
20	UCLA Health / UCLA Medical GroupLos Angeles · 13 sites	Parent on file	220	295	Decision makers
21	GENESIS Older Adult Program (Los Angeles County Department of Mental Health)Los Angeles · 120 sites	Parent on file	212	729	Decision makers
22	UCLA Medical Group (UCLA Health)Los Angeles · 45 sites	Parent on file	203	243	Decision makers
23	UC San Diego HealthLos Angeles · 15 sites	Parent on file	193	274	Decision makers
24	Superior Hospitalist Medical GroupLos Angeles · 18 sites	-	168	184	Decision makers
25	UCLA Medical GroupLos Angeles · 10 sites	Parent on file	162	200	Decision makers
26	UCLA HealthLos Angeles · 17 sites	Parent on file	153	340	Decision makers
27	Golden State Emergency Physicians, Inc.Los Angeles · 22 sites	-	139	202	Decision makers
28	UCLA Emergency MedicineLos Angeles · 9 sites	Parent on file	124	139	Decision makers
29	UCLA NeurologyLos Angeles · 23 sites	Parent on file	119	148	Decision makers
30	St. John's Community HealthLos Angeles · 29 sites	Parent on file	114	455	Decision makers
31	Adventist Health White MemorialLos Angeles · 9 sites	Parent on file	110	127	Decision makers
32	UCLA Jules Stein Eye InstituteLos Angeles · 17 sites	Parent on file	98	125	Decision makers
33	UCLA Health Westwood OBGYNLos Angeles · 11 sites	Parent on file	82	97	Decision makers
34	Exer Urgent CareLos Angeles · 38 sites	Parent on file	80	159	Decision makers
35	Victory Emergency Physicians Medical GroupLos Angeles · 9 sites	-	80	118	Decision makers
36	UCLA Department of Pathology and LaboratoryLos Angeles · 9 sites	Parent on file	79	84	Decision makers
37	UCLA Associated General SurgeonsLos Angeles · 15 sites	Parent on file	72	85	Decision makers
38	UCLA Health (UCLA Medical Group)Los Angeles · 17 sites	Parent on file	72	80	Decision makers
39	UCLA Orthopaedic SurgeryLos Angeles · 19 sites	Parent on file	68	83	Decision makers
40	UCLA Medical GroupLos Angeles · 37 sites	Parent on file	66	111	Decision makers
41	UCLA HealthLos Angeles · 19 sites	Parent on file	65	167	Decision makers
42	AIDS Healthcare FoundationLos Angeles · 82 sites	Parent on file	57	131	Decision makers
43	UCLA Division of DermatologyLos Angeles · 12 sites	Parent on file	57	62	Decision makers
44	Tower Imaging Medical GroupLos Angeles · 63 sites	-	57	57	Decision makers
45	CHA Hollywood Presbyterian Medical CenterLos Angeles · 10 sites	Parent on file	50	93	Decision makers
46	Socal Anesthesia Solutions IncLos Angeles · 9 sites	Parent on file	50	75	Decision makers
47	MLK Community Medical GroupLos Angeles · 8 sites	Parent on file	49	70	Decision makers
48	Skilled Physicians GroupLos Angeles · 4 sites	-	49	61	Decision makers
49	UCLA UrologyLos Angeles · 10 sites	Parent on file	49	59	Decision makers
50	Hp Anesthesia IncLos Angeles · 8 sites	-	44	78	Decision makers

Showing 1 to 10 of 584 medical groups in Los Angeles

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

University of California Health has the most physicians in Los Angeles medical groups, with 5,288 across 38 groups

Dmand AI maps every Los Angeles medical group to its parent organization, up to the health system or platform at the top. 26 parent organizations have two or more Los Angeles medical groups. Each clinician counts once per parent organization.

Parent organizations with the most Los Angeles medical groups
#	Parent organization	Los Angeles groups	Physicians	HCPs
1	University of California HealthAcademic health system	38	5,288	7,286
2	Cedars-Sinai Health SystemHealth system	3	1,707	2,199
3	UnitedHealth GroupDiversified health company	10	1,557	2,305
4	University of Southern CaliforniaAcademic health system	3	1,551	2,406
5	Children's Hospital Los AngelesHealth system	2	1,064	1,263
6	County of Los AngelesLocal government	6	658	1,275
7	Providence Health & ServicesHealth system	6	520	757
8	Beverly Radiology Medical GroupPhysician staffing company	3	490	502
9	RadNetTreatment center company	7	419	432
10	UCLAAcademic health system	3	173	200

Top 10 of 26 parent organizations with two or more Los Angeles groups

University of California HealthAcademic health system · 38 Los Angeles medical groups
UC San Diego HealthMulti-specialty group · 180 sites
UCLA Medical GroupMedical group · 128 sites
36 more Los Angeles groups and their practice sites

See every medical group, site and clinician under University of California Health

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Source: Dmand AI Org Hierarchy Data

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Dmand AI maps the owners, administrators and physician leaders at each of the 584 Los Angeles medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.

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67% of Los Angeles medical 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.

Los Angeles medical groups by ownership

Independent39167%
Health system or hospital7914%
Platform or corporate owner315%
Community or government366%
Other organization478%

Source: Dmand AI Org Hierarchy Data

130 Los Angeles medical groups practice at a hospital site

Beyond their own offices, groups practice at the sites of care linked to them in the org hierarchy. A group can practice at several kinds of site, so the shares overlap.

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

Primary care groups are the most common medical groups in Los Angeles, with 251

Each group is counted once, under its main specialty. Behavioral and mental health groups are second, with 53, and 174 Los Angeles groups are multi-specialty.

Source: Dmand AI Professional Profile Data

25,101 California HCPs work in Los Angeles medical groups, 15,920 of them physicians

Each clinician is counted once, across every Los Angeles group they are linked to. Only clinicians with a California address are counted.

HCPs in Los Angeles medical groups by type

Physicians (MD, DO)15,92063%
Nurses and nurse practitioners3,50114%
Behavioral health clinicians1,7087%
Physician assistants1,6417%
Therapists (PT and OT)6793%
Other HCPs1,6527%

Source: Dmand AI Affiliation Data

Each Los Angeles medical 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 Los Angeles medical group directory

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

The directory lists groups based in Los Angeles with a Medicare PAC ID.

FAQ

Frequently asked questions about medical groups in Los Angeles

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

How many medical groups are in Los Angeles?

There are 584 medical groups based in Los Angeles with a Medicare PAC ID: 174 multi-specialty and 410 single-specialty. 263 of them have more than one site.

What is the largest medical group in Los Angeles?

UC San Diego Health, with 2,139 physicians and 3,019 HCPs with a California address. Loma Linda University Faculty Medical Group (LLUFMG) is second with 1,723, and Cedars-Sinai Medical Group is third with 1,699.

Which health system has the most medical groups in Los Angeles?

By physicians, University of California Health, with 5,288 across 38 groups, followed by Cedars-Sinai Health System with 1,707 and UnitedHealth Group with 1,557.

How many Los Angeles medical groups are independent?

391, or 67%, have no larger parent organization in the Dmand AI org hierarchy. 79 belong to a health system or hospital and 31 to a physician platform or corporate owner.

How many Los Angeles medical groups practice at a hospital?

130 Los Angeles groups practice at a hospital site linked to them in the Dmand AI org hierarchy.

How do I find a medical group's NPI or PAC ID?

Each medical group profile lists the group NPI and Medicare PAC ID at the top, with the main address and phone number. The NPI comes from the NPPES NPI Registry and the PAC ID from CMS Medicare enrollment.

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