Updated October 2026

Largest emergency and hospital medicine groups in California

Medical group directory
California
Emergency and hospital medicine

Groups: 339
Emergency Medicine groups: 302
Hospitalist groups: 37
Emergency physicians: 4,620
Hospitalist specialists: 179

There are 339 emergency and hospital medicine groups in California with a Medicare PAC ID: 302 emergency medicine and 37 hospitalist. Vituity is the largest emergency medicine group, with 2,007 emergency physicians, and Pacific Hospitalist Associates the largest hospitalist group, with 77 hospitalist specialists.

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Vituity is the largest emergency and hospital medicine group in California, with 2,155 physicians

Ranked by physicians with a California address linked to each group. Team Physicians of California Medical Group Inc is second with 201, and Seven Star Medical Group third with 170. 19 California groups have 100 or more physicians.

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Emergency and hospital medicine groups in California, ranked by physicians
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1	VituityModesto · 320 sites	Parent on file	2,155	4,058	Decision makers
2	Team Physicians of California Medical Group IncDelano · 15 sites	-	201	340	Decision makers
3	Seven Star Medical GroupHemet · 28 sites	-	170	249	Decision makers
4	UCLA Medical GroupLos Angeles · 10 sites	Parent on file	162	200	Decision makers
5	UCI Health PhysiciansOrange · 16 sites	Parent on file	156	203	Decision makers
6	Emergency Physicians AssociatesSan Jose · 11 sites	Parent on file	150	194	Decision makers
7	Exer Urgent CareCalabasas · 81 sites	Parent on file	141	400	Decision makers
8	Solano Gateway Medical Group, Inc.Fairfield · 32 sites	-	141	212	Decision makers
9	Golden State Emergency Physicians, Inc.Los Angeles · 22 sites	-	139	202	Decision makers
10	TeamHealthPleasanton · 19 sites	Parent on file	136	216	Decision makers
11	Pinnacle Emergency Physicians of BakersfieldBakersfield · 20 sites	-	127	211	Decision makers
12	UCLA Emergency MedicineLos Angeles · 9 sites	Parent on file	124	139	Decision makers
13	San Francisco Emergency Medical AssociatesMill Valley · 17 sites	-	120	169	Decision makers
14	San Ramon Emergency PhysiciansPleasanton · 19 sites	-	118	174	Decision makers
15	Palomar Emergency PhysiciansEscondido · 18 sites	Parent on file	118	147	Decision makers
16	US Acute Care SolutionsBakersfield · 19 sites	Parent on file	114	170	Decision makers
17	Sierra Emergency Medical GroupPleasanton · 15 sites	Parent on file	109	162	Decision makers
18	VituityModesto · 56 sites	Parent on file	108	120	Decision makers
19	Ridgeline Emergency Physicians Medical Group, Inc.Northridge · 22 sites	-	100	168	Decision makers
20	Pacific Hospitalist AssociatesNewport Beach · 6 sites	-	99	101	Decision makers
21	Chase Dennis Emergency Medical GroupSanta Rosa · 7 sites	-	98	113	Decision makers
22	Intercommunity Emergency Medical GroupWhittier · 9 sites	-	95	154	Decision makers
23	NES HealthPorterville · 10 sites	Parent on file	93	164	Decision makers
24	San Joaquin Emergency Medical AssociatesMerced · 11 sites	-	93	151	Decision makers
25	EM AllianceMurrieta · 7 sites	Parent on file	92	142	Decision makers
26	Can Emergency Physicians Medical GroupBurbank · 9 sites	Parent on file	91	122	Decision makers
27	Apex Emergency Medical GroupHemet · 16 sites	-	88	143	Decision makers
28	Corona Regional Medical CenterCorona · 19 sites	Parent on file	87	138	Decision makers
29	Pacific Redwood Medical GroupUkiah · 11 sites	Parent on file	83	115	Decision makers
30	HMH Emergency Medical GroupPasadena · 11 sites	Parent on file	82	113	Decision makers
31	Mammoth HospitalMammoth Lakes · 2 sites	Parent on file	80	122	Decision makers
32	Victory Emergency Physicians Medical GroupLos Angeles · 9 sites	-	80	118	Decision makers
33	Centinela Freeman Emergency Medical Associates, Inc.Inglewood · 14 sites	-	79	130	Decision makers
34	Montclair Emergency Medical AssociatesMontclair · 8 sites	-	78	95	Decision makers
35	Chino Emergency Medical Associates, Inc.Chino · 10 sites	-	77	95	Decision makers
36	Napa Valley Emergency Medical GroupSonoma · 10 sites	Parent on file	77	93	Decision makers
37	Emergency Physicians AssociatesFremont · 12 sites	Parent on file	76	97	Decision makers
38	Emergency Medicine Specialists of Orange CountyOrange · 9 sites	Parent on file	75	125	Decision makers
39	Emergency Services Medical CorporationSan Diego · 11 sites	Parent on file	71	77	Decision makers
40	Mountain View Emergency Physicians Medical GroupUpland · 11 sites	-	68	135	Decision makers
41	VituityEmeryville · 7 sites	Parent on file	68	100	Decision makers
42	Valley Presbyterian Emergency Medical AssociatesVannuys · 10 sites	-	65	120	Decision makers
43	GEM Medical Group (GEM, Emergency Medicine Providers)Whittier · 6 sites	Parent on file	64	100	Decision makers
44	San Dimas Community HospitalSan Dimas · 9 sites	Parent on file	62	65	Decision makers
45	VituityEmeryville · 296 sites	Parent on file	60	70	Decision makers
46	Temecula Valley Emergency PhysiciansTemecula · 10 sites	-	59	92	Decision makers
47	Columbia Emergency Medical GroupLong Beach · 8 sites	-	58	96	Decision makers
48	Huntington Park Emergency PhysiciansHuntington Park · 8 sites	Parent on file	57	91	Decision makers
49	Emergency Physicians Of Orange CountyNewport Beach · 9 sites	Parent on file	57	81	Decision makers
50	Emergent Medical Associates (EMA)La Palma · 5 sites	Parent on file	56	58	Decision makers

Showing 1 to 50 of 339 emergency and hospital medicine groups in California

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

Vituity is the largest emergency medicine group in California, with 2,007 emergency physicians

Ranked by emergency physicians with a California address linked to each group whose main sub-specialty is emergency medicine. Team Physicians of California Medical Group Inc is second with 180, and UCI Health Physicians third with 155.

Largest emergency medicine groups in California
#	Medical group	Parent organization	Emergency physicians	HCPs
1	VituityModesto · 320 sites	Parent on file	2,007	4,058
2	Team Physicians of California Medical Group IncDelano · 15 sites	-	180	340
3	UCI Health PhysiciansOrange · 16 sites	Parent on file	155	203
4	UCLA Medical GroupLos Angeles · 10 sites	Parent on file	150	200
5	Emergency Physicians AssociatesSan Jose · 11 sites	Parent on file	145	194
6	Solano Gateway Medical Group, Inc.Fairfield · 32 sites	-	138	212
7	TeamHealthPleasanton · 19 sites	Parent on file	130	216
8	Golden State Emergency Physicians, Inc.Los Angeles · 22 sites	-	123	202
9	UCLA Emergency MedicineLos Angeles · 9 sites	Parent on file	121	139
10	Palomar Emergency PhysiciansEscondido · 18 sites	Parent on file	116	147

Top 10 of 302 California emergency medicine groups

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

Pacific Hospitalist Associates is the largest hospitalist group in California, with 77 hospitalist specialists

Ranked by hospitalist specialists with a California address linked to each group whose main sub-specialty is hospitalist. Vituity is second with 49, and Monterey Hospitalist Medical Group third with 38.

Largest hospitalist groups in California
#	Medical group	Parent organization	Hospitalist specialists	HCPs
1	Pacific Hospitalist AssociatesNewport Beach · 6 sites	-	77	101
2	VituityModesto · 56 sites	Parent on file	49	120
3	Monterey Hospitalist Medical GroupMonterey · 5 sites	Parent on file	38	47
4	Solomon MedicalPacific Grove · 5 sites	Parent on file	5	31
5	Solomon MedicalPacific Grove · 5 sites	Parent on file	5	24
6	California Hospitalist Medical CorporationFremont · 1 site	-	2	7
7	Valle Verde Medical GroupSalinas · 1 site	-	1	2
8	Joshua A. Ronen, MD, Inc.Pasadena · 2 sites	-	1	2
9	Blossom Ridge Medical GroupSaratoga · 1 site	-	1	2
10	Fresno Sleep Wake CenterFresno · 2 sites	Parent on file	1	2

Top 10 of 37 California hospitalist groups

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

Vituity has the most physicians in California emergency and hospital medicine groups, with 2,317 across 21 groups

Dmand AI maps every medical group to its parent organization, up to the health system or platform at the top. 26 parent organizations have two or more California emergency and hospital medicine groups. Among health systems, Providence Health & Services has the most groups, 4. Each clinician counts once per parent organization.

Parent organizations with the most California emergency and hospital medicine groups
#	Parent organization	California groups	Physicians	HCPs
1	VituityPhysician staffing company	21	2,317	4,259
2	Emergent Medical AssociatesPhysician staffing company	10	222	334
3	UC IrvineAcademic health system	2	172	236
4	Emergency Physicians AssociatesPhysician staffing company	2	158	213
5	Sierra Emergency Medical GroupPhysician staffing company	3	151	229
6	TeamHealthPhysician staffing company	2	139	220
7	Pipeline Health SystemHealth system	3	123	171
8	Prime Healthcare ServicesHealth system	3	119	178
9	Napa Valley Emergency Medical GroupPhysician staffing company	2	112	145
10	Providence Health & ServicesHealth system	4	106	162

Top 10 of 26 parent organizations with two or more California groups

VituityPhysician staffing company · 21 California emergency and hospital medicine groups
VituityMedical group · Modesto
VituityMulti-specialty group · Modesto
19 more California groups and their practice sites

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Source: Dmand AI Org Hierarchy Data

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40% of California emergency and hospital medicine 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 emergency and hospital medicine groups by ownership

Independent13440%
Health system or hospital4313%
Platform or corporate owner9127%
Community or government51%
Other organization6619%

Sites of care beyond their own offices

Practice at a hospital201

Practice at a skilled nursing facility9

Practice at an FQHC8

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Source: Dmand AI Org Hierarchy Data

201 California emergency and hospital medicine groups practice at a hospital site, and 9 at a skilled nursing facility

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 emergency and hospital medicine groups by site of care

Hospitals20159%
Skilled nursing facilities93%
FQHCs82%
Rural health clinics62%
Hospices31%
Ambulatory surgery centers21%
Home health agencies21%
Dialysis centers11%

Clinicians in California emergency and hospital medicine groups

Emergency physicians4,620

Hospitalist specialists179

All HCPs10,306

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

Los Angeles has the most emergency and hospital medicine groups in California, with 19

19emergency and hospital medicine groups in Los Angeles

15emergency and hospital medicine groups in Pleasanton

11emergency and hospital medicine groups in Emeryville

11emergency and hospital medicine groups in Modesto

10emergency and hospital medicine groups in Glendale

10emergency and hospital medicine groups in San Diego

More California cities with emergency and hospital medicine groups

Burbank7
Torrance7
Anaheim5
Monterey5
Pasadena5
Redding5
Vannuys5
El Segundo4
Sacramento4
San Francisco4
Bakersfield3
Corona3
Encinitas3
Encino3
Fremont3

Source: Doctors and Clinicians National Downloadable File (CMS)

Each California emergency and hospital medicine 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 emergency and hospital medicine 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 emergency and hospital medicine and that have a Medicare PAC ID.

FAQ

Frequently asked questions about emergency and hospital medicine 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.

What is the largest emergency medicine group in California?

Vituity, based in Modesto, with 2,007 emergency physicians and 4,058 HCPs. Team Physicians of California Medical Group Inc is second with 180.

What is the largest hospitalist group in California?

Pacific Hospitalist Associates, based in Newport Beach, with 77 hospitalist specialists and 101 HCPs. Vituity is second with 49.

How many emergency and hospital medicine groups are in California?

There are 339 emergency and hospital medicine groups in California with a Medicare PAC ID: 302 emergency medicine and 37 hospitalist. Between them they have 4,620 emergency physicians and 179 hospitalist specialists.

Which companies own the most emergency and hospital medicine groups?

By physicians, Vituity, with 2,317 across 21 groups, followed by Emergent Medical Associates with 222 and UC Irvine with 172.

How many California emergency and hospital medicine groups are independent?

134, or 40%, have no larger parent organization in the Dmand AI org hierarchy. 43 belong to a health system or hospital and 91 to a physician platform or corporate owner.

Why are emergency and hospital medicine listed together?

They share one specialty category in the Dmand AI medical group data. This page also ranks each sub-specialty on its own, by its own specialists.

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