Updated October 2026

Largest general and specialty surgery groups in California

Medical group directory
California
General and specialty surgery

Groups: 157
Surgery groups: 157
Surgery specialists: 1,024
Physicians: 1,522
More than one site: 92

There are 157 general and specialty surgery groups in California with a Medicare PAC ID. Ucsf Dept Of Surgery is the largest, with 266 physicians.

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Ucsf Dept Of Surgery is the largest general and specialty surgery group in California, with 266 physicians

Ranked by physicians with a California address linked to each group. Acute Care Surgery Medical Group is second with 175, and UCI Health Physicians third with 114. 3 California groups have 100 or more physicians.

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General and specialty surgery groups in California, ranked by physicians
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1	Ucsf Dept Of SurgerySan Francisco · 70 sites	Parent on file	266	783	Decision makers
2	Acute Care Surgery Medical GroupSacramento · 46 sites	-	175	245	Decision makers
3	UCI Health PhysiciansOrange · 11 sites	Parent on file	114	203	Decision makers
4	Surgical AffiliatesLos Banos · 10 sites	Parent on file	72	86	Decision makers
5	UCLA Associated General SurgeonsLos Angeles · 15 sites	Parent on file	72	85	Decision makers
6	Cal Med Physicians and SurgeonsColton · 4 sites	Parent on file	68	81	Decision makers
7	Skilled BiologicsSacramento · 4 sites	-	60	73	Decision makers
8	Advantage Surgical and Wound CareEl Segundo · 121 sites	Parent on file	41	88	Decision makers
9	Desert Trauma SurgeonsLynwood · 7 sites	Parent on file	36	47	Decision makers
10	Omni Wound PhysiciansNewhall · 4 sites	Parent on file	33	83	Decision makers
11	OC Surgeons, Saddleback Valley SurgicalMission Viejo · 5 sites	-	21	26	Decision makers
12	East Bay Cardiovascular & Thoracic AssociatesDanville · 3 sites	-	20	20	Decision makers
13	Association Of South Bay SurgeonsTorrance · 1 site	Parent on file	19	21	Decision makers
14	UCLA Surgical Oncology AssociatesLos Angeles · 17 sites	Parent on file	19	21	Decision makers
15	OC Surgeons (South Orange County Surgical)Laguna Hills · 5 sites	-	18	29	Decision makers
16	Mission Surgical ClinicRiverside · 4 sites	-	18	19	Decision makers
17	Integrity Wound Physicians Inc.Modesto · 1 site	-	17	19	Decision makers
18	Providence Saint John's Health CenterSanta Monica · 4 sites	Parent on file	17	19	Decision makers
19	Anacapa Surgical AssociatesVentura · 4 sites	Parent on file	16	21	Decision makers
20	Murrieta Valley Surgery AssociatesWildomar · 1 site	-	16	17	Decision makers
21	Modesto Surgical AssociatesModesto · 4 sites	-	15	35	Decision makers
22	Orange County Wound/HyperbaricSanta Ana · 3 sites	-	14	20	Decision makers
23	Newport Irvine Surgical SpecialistsNewport Beach · 1 site	-	14	17	Decision makers
24	Trauma Medical Group of RosevilleRoseville · 3 sites	-	14	16	Decision makers
25	UCLA Gonda (Goldschmied) Vascular CenterLos Angeles · 3 sites	Parent on file	13	20	Decision makers
26	The Sierra Medical PartnershipFolsom · 5 sites	Parent on file	13	19	Decision makers
27	Valley Breast Care and Women's Health CenterVannuys · 1 site	Parent on file	13	15	Decision makers
28	Associated Surgeons of San Luis ObispoSan Luis Obispo · 3 sites	Parent on file	13	13	Decision makers
29	Pacific Emergency ProvidersSan Diego · 2 sites	Parent on file	13	13	Decision makers
30	Advanced Surgical AssociatesSan Jose · 1 site	-	12	12	Decision makers
31	Institute of Trauma and Acute Care (ITAC)Pomona · 2 sites	-	12	12	Decision makers
32	North County Trauma AssociatesEscondido · 2 sites	Parent on file	12	12	Decision makers
33	Wound DocsAliso Viejo · 1 site	-	11	34	Decision makers
34	Murrieta Valley Surgery AssociatesWildomar · 1 site	-	11	14	Decision makers
35	Empire Vein & Vascular SpecialistsRancho Mirage · 2 sites	-	11	11	Decision makers
36	House MedicineAlhambra · 5 sites	-	10	16	Decision makers
37	Naadi HealthcareManteca · 2 sites	Parent on file	10	12	Decision makers
38	Vascular & Interventional Specialists of Orange CountyOrange · 3 sites	-	10	12	Decision makers
39	USA Vascular CentersValley Village · 1 site	Parent on file	10	10	Decision makers
40	Northridge Trauma SurgeonsNorthridge · 2 sites	-	9	12	Decision makers
41	Oaks Surgical SpecialistsNorthridge · 2 sites	-	9	10	Decision makers
42	Southern California Multi-Specialty CenterSherman Oaks · 3 sites	-	8	20	Decision makers
43	SS Vascular Surgery & Endovascular TherapyEscondido · 6 sites	-	8	13	Decision makers
44	Grossman Plastic SurgeryWest Hills · 5 sites	-	8	11	Decision makers
45	University Vascular AssociatesLos Angeles · 4 sites	-	8	10	Decision makers
46	Advance Surgeons Medical GroupMonterey Park · 3 sites	-	8	9	Decision makers
47	Cutting Edge Surgical Medical GroupApple Valley · 3 sites	Parent on file	8	9	Decision makers
48	Coast Surgical GroupChula Vista · 1 site	-	8	8	Decision makers
49	San Diego Surgical SpecialistsSan Diego · 2 sites	-	8	8	Decision makers
50	Surgical Associates of Monterey BaySanta Cruz · 1 site	-	7	12	Decision makers

Showing 1 to 10 of 157 general and specialty surgery groups in California

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

University of California Health has the most physicians in California general and specialty surgery groups, with 368 across 6 groups

Dmand AI maps every medical group to its parent organization, up to the health system or platform at the top. 8 parent organizations have two or more California general and specialty surgery groups. Each clinician counts once per parent organization.

Parent organizations with the most California general and specialty surgery groups
#	Parent organization	California groups	Physicians	HCPs
1	University of California HealthAcademic health system	6	368	908
2	Advantage Surgical and Wound CarePhysician practice platform	2	42	89
3	Omni Wound PhysiciansPhysician practice platform	4	34	84
4	Providence Health & ServicesHealth system	3	27	30
5	CommonSpirit HealthHealth system	3	24	29
6	Scripps Affiliated Medical GroupsManagement company	3	19	19
7	USA Clinics GroupPhysician practice platform	3	11	12
8	UnitedHealth GroupDiversified health company	4	8	12

Parent organizations with two or more California groups

University of California HealthAcademic health system · 6 California general and specialty surgery groups
Ucsf Dept Of SurgeryMulti-specialty group · San Francisco
UCLA Associated General SurgeonsMulti-specialty group · Los Angeles
4 more California groups and their practice sites

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Source: Dmand AI Org Hierarchy Data

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68% of California general and specialty surgery 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 general and specialty surgery groups by ownership

Independent10768%
Health system or hospital1912%
Platform or corporate owner2013%
Community or government11%
Other organization106%

Sites of care beyond their own offices

Practice at a hospital37

Practice at a surgery center18

Practice at a skilled nursing facility2

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Source: Dmand AI Org Hierarchy Data

37 California general and specialty surgery groups practice at a hospital site, and 18 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 general and specialty surgery groups by site of care

Hospitals3724%
Ambulatory surgery centers1811%
Skilled nursing facilities21%
FQHCs11%
Therapy and rehab centers11%
Hospices11%
Behavioral health facilities11%

Clinicians in California general and specialty surgery groups

Surgery specialists1,024

All HCPs2,616

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

Los Angeles has the most general and specialty surgery groups in California, with 11

11general and specialty surgery groups in Los Angeles

4general and specialty surgery groups in Orange

4general and specialty surgery groups in San Diego

4general and specialty surgery groups in Santa Ana

4general and specialty surgery groups in Torrance

3general and specialty surgery groups in Arcadia

More California cities with general and specialty surgery groups

Corona3
Fountain Valley3
Modesto3
Newhall3
Newport Beach3
Oxnard3
San Bernardino3
San Francisco3
Vannuys3
Ventura3
Visalia3
Apple Valley2
Chula Vista2
El Segundo2
Encinitas2

Source: Doctors and Clinicians National Downloadable File (CMS)

Each California general and specialty surgery 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 general and specialty surgery 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 general and specialty surgery and that have a Medicare PAC ID.

FAQ

Frequently asked questions about general and specialty surgery 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 general and specialty surgery groups are in California?

There are 157 general and specialty surgery groups in California with a Medicare PAC ID. Between them they have 1,024 surgery specialists.

Which companies own the most general and specialty surgery groups?

By physicians, University of California Health, with 368 across 6 groups, followed by Advantage Surgical and Wound Care with 42 and Omni Wound Physicians with 34.

How many California general and specialty surgery groups are independent?

107, or 68%, have no larger parent organization in the Dmand AI org hierarchy. 19 belong to a health system or hospital and 20 to a physician platform or corporate owner.

Why are surgery (general and specialty) 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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