> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/621111/california/ # NAICS 621111 companies in California Companies with NAICS code 621111 (Offices of Physicians (Except Mental Health Specialists)) headquartered in California, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 621111 companies in California by headcount range include Choc Children's, Clinica Sierra Vista and Sansum Clinic. NAICS 621111 is the code for Offices of Physicians (Except Mental Health Specialists). Among those counted, they are mostly very small: 70% have 50 or fewer employees. ## Which NAICS 621111 companies are in California? The biggest by headcount range include Choc Children's, Clinica Sierra Vista, Sansum Clinic, Sharp HealthCare and Truecare. NAICS 621111 is the code for Offices of Physicians (Except Mental Health Specialists). Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Choc Children's | Orange | 1,001 to 5,000 | | Clinica Sierra Vista | Bakersfield | 1,001 to 5,000 | | Sansum Clinic | Santa Barbara | 1,001 to 5,000 | | [Sharp HealthCare](https://enrich.chat/company/sharp-healthcare/) | San Diego | 1,001 to 5,000 | | Truecare | San Marcos | 501 to 1,000 | | Hill Physicians Medical Group | San Ramon | 501 to 1,000 | | The Oncology Institute | Cerritos | 501 to 1,000 | | Acuity Eye Group | Pasadena | 501 to 1,000 | | Lifelong Medical Care | Berkeley | 501 to 1,000 | | Omni Family Health | Bakersfield | 501 to 1,000 | | Riverside Medical Clinic | Riverside | 501 to 1,000 | | Petaluma Health Center | Petaluma | 501 to 1,000 | | Elica Health Centers | Sacramento | 501 to 1,000 | | Spring Fertility | San Francisco | 201 to 500 | | Imaging Healthcare Specialists | San Diego | 201 to 500 | | Watts Healthcare | Los Angeles | 201 to 500 | | Golden State Dermatology | Walnut Creek | 201 to 500 | | Agile Occupational Medicine | Costa Mesa | 201 to 500 | | Choice Medical Group | Apple Valley | 201 to 500 | | Central City Community Health Center | Monterey Park | 201 to 500 | | United Medical Doctors | Murrieta | 201 to 500 | | Via Care Community Health Center | Los Angeles | 201 to 500 | | Community Health Center Network | San Leandro | 51 to 200 | | Plushcare | San Francisco | 51 to 200 | | Orangetwist | Newport Beach | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Which cities in California? Within California, Los Angeles (7%), Newport Beach (4%) and San Francisco (4%) are the most common headquarters. **Figure: Cities of NAICS 621111 companies in California.** Bars for the share of counted NAICS 621111 companies in California headquartered in each city: Los Angeles 7%, Newport Beach 4%, San Francisco 4%, San Diego 4%. *Share of counted NAICS 621111 companies in California by headquarters city.* ## How big are they? 70% of the NAICS 621111 companies counted in California have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of NAICS 621111 companies in California.** Seven columns for the share of counted NAICS 621111 companies in California in each employee range: 11 to 50 70%, 51 to 200 20%, 201 to 500 4%, 501 to 1,000 4%, 1,001 to 5,000 2%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted NAICS 621111 companies in California in each employee range.* ## How old are they? Most were founded in the 2010s (25%), then the 2000s (24%). **Figure: When NAICS 621111 companies in California were founded.** Eight columns for the share of counted NAICS 621111 companies in California founded in each era: Before 1960 3%, 1960s 3%, 1970s 12%, 1980s 9%, 1990s 23%, 2000s 24%, 2010s 25%, 2020s 2%. *Share of counted NAICS 621111 companies in California by the era they were founded in, for the ones that list a founding year.* ## How do you reach the people at these California companies? The people to talk to are usually operations, IT and finance leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 621111 in California ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the operations, IT and finance leaders at companies with NAICS code 621111 in California, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore About the code: [NAICS 621111: Offices of Physicians (Except Mental Health Specialists)](https://enrich.chat/naics/621111/). About the place: [companies in California](https://enrich.chat/companies-in/california/). NAICS 621111 in other states: [Texas](https://enrich.chat/naics/621111/texas/)[Florida](https://enrich.chat/naics/621111/florida/)[New York](https://enrich.chat/naics/621111/new-york/)[Georgia](https://enrich.chat/naics/621111/georgia/)[Illinois](https://enrich.chat/naics/621111/illinois/)[Tennessee](https://enrich.chat/naics/621111/tennessee/)[New Jersey](https://enrich.chat/naics/621111/new-jersey/)[Ohio](https://enrich.chat/naics/621111/ohio/)[Arizona](https://enrich.chat/naics/621111/arizona/)[Massachusetts](https://enrich.chat/naics/621111/massachusetts/) Other NAICS codes in California: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/california/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/california/)[NAICS 722511: Full-Service Restaurants](https://enrich.chat/naics/722511/california/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/california/)[NAICS 238220: Plumbing, Heating, and Air-Conditioning](https://enrich.chat/naics/238220/california/)[NAICS 513210: Software Publishers](https://enrich.chat/naics/513210/california/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/california/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/california/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/california/)[NAICS 541110: Offices of Lawyers](https://enrich.chat/naics/541110/california/) ## Frequently asked questions ### Which NAICS 621111 companies are in California? The biggest by headcount range include Choc Children's, Clinica Sierra Vista, Sansum Clinic, Sharp HealthCare and Truecare. The page lists 25 with links to their profiles where we have them. ### What is NAICS 621111? NAICS 621111 is the code for Offices of Physicians (Except Mental Health Specialists), in sector 62: Health Care and Social Assistance. ### Which cities in California have the most? Los Angeles (7%), Newport Beach (4%) and San Francisco (4%) lead among the companies counted. ## Try this prompt Find the people at NAICS 621111 companies in California ```text Use www.enrich.chat to find the operations, IT and finance leaders at companies with NAICS code 621111 in California, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 621111 in Texas](https://enrich.chat/naics/621111/texas/) - [NAICS 621111 in Florida](https://enrich.chat/naics/621111/florida/) - [NAICS 621111 in New York](https://enrich.chat/naics/621111/new-york/) - [NAICS 621111 in Georgia](https://enrich.chat/naics/621111/georgia/) - [NAICS 541511 in California](https://enrich.chat/naics/541511/california/) - [NAICS 541512 in California](https://enrich.chat/naics/541512/california/) - [NAICS 722511 in California](https://enrich.chat/naics/722511/california/) - [NAICS 541613 in California](https://enrich.chat/naics/541613/california/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)