> 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/621999/california/ # NAICS 621999 companies in California Companies with NAICS code 621999 (All Other Miscellaneous Ambulatory Health Care Services) headquartered in California, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 621999 companies in California by headcount range include Altamed Health Services, Beecan Health and Medcare Mso. NAICS 621999 is the code for All Other Miscellaneous Ambulatory Health Care Services. Among those counted, they are mostly very small: 63% have 50 or fewer employees. ## Which NAICS 621999 companies are in California? The biggest by headcount range include Altamed Health Services, Beecan Health, Medcare Mso, El Camino Health and Qtc Management. NAICS 621999 is the code for All Other Miscellaneous Ambulatory Health Care Services. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Altamed Health Services | Los Angeles | 5,001 to 10,000 | | Beecan Health | Glendale | 5,001 to 10,000 | | Medcare Mso | Irvine | 1,001 to 5,000 | | El Camino Health | Mountain View | 1,001 to 5,000 | | Qtc Management | San Dimas | 1,001 to 5,000 | | Chuze Fitness | San Diego | 1,001 to 5,000 | | Kern Medical | Bakersfield | 1,001 to 5,000 | | 360 Behavioral Health | Van Nuys | 1,001 to 5,000 | | Headspace | Santa Monica | 501 to 1,000 | | Two Chairs | San Francisco | 501 to 1,000 | | Collective Health | San Francisco | 501 to 1,000 | | Foresight Mental Health | Berkeley | 501 to 1,000 | | Innovative Integrated Health | Fresno | 501 to 1,000 | | Impact Healthcare | San Francisco | 501 to 1,000 | | Modern Health | San Francisco | 201 to 500 | | Curology | San Diego | 201 to 500 | | Brightside Health | San Francisco | 201 to 500 | | Concert Health | San Diego | 201 to 500 | | Donor Network West | San Ramon | 201 to 500 | | Atlas Lift Tech | San Ramon | 201 to 500 | | Lorian Health | San Diego | 201 to 500 | | Cal-A-Vie Health | Vista | 201 to 500 | | Sunshine Behavioral Health | San Juan Capistrano | 201 to 500 | | University Medical Partners | Newark | 201 to 500 | | Boston Medical Group | Costa Mesa | 201 to 500 | 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 (9%), San Francisco (9%) and San Diego (8%) are the most common headquarters. **Figure: Cities of NAICS 621999 companies in California.** Bars for the share of counted NAICS 621999 companies in California headquartered in each city: Los Angeles 9%, San Francisco 9%, San Diego 8%, San Jose 3%, Berkeley 2%, Concord 2%, Oakland 2%. *Share of counted NAICS 621999 companies in California by headquarters city.* ## How big are they? 63% of the NAICS 621999 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 621999 companies in California.** Seven columns for the share of counted NAICS 621999 companies in California in each employee range: 11 to 50 63%, 51 to 200 21%, 201 to 500 8%, 501 to 1,000 4%, 1,001 to 5,000 3%, 5,001 to 10,000 1%, 10,001+ 0%. *Share of counted NAICS 621999 companies in California in each employee range.* ## How old are they? Most were founded in the 2010s (58%), then the 2000s (19%). **Figure: When NAICS 621999 companies in California were founded.** Eight columns for the share of counted NAICS 621999 companies in California founded in each era: Before 1960 1%, 1960s 2%, 1970s 2%, 1980s 4%, 1990s 4%, 2000s 19%, 2010s 58%, 2020s 12%. *Share of counted NAICS 621999 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 621999 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 621999 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 621999: All Other Miscellaneous Ambulatory Health Care Services](https://enrich.chat/naics/621999/). About the place: [companies in California](https://enrich.chat/companies-in/california/). NAICS 621999 in other states: [Texas](https://enrich.chat/naics/621999/texas/)[Florida](https://enrich.chat/naics/621999/florida/)[Illinois](https://enrich.chat/naics/621999/illinois/)[Colorado](https://enrich.chat/naics/621999/colorado/)[Arizona](https://enrich.chat/naics/621999/arizona/) 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 621111: Offices of Physicians](https://enrich.chat/naics/621111/california/) ## Frequently asked questions ### Which NAICS 621999 companies are in California? The biggest by headcount range include Altamed Health Services, Beecan Health, Medcare Mso, El Camino Health and Qtc Management. The page lists 25 with links to their profiles where we have them. ### What is NAICS 621999? NAICS 621999 is the code for All Other Miscellaneous Ambulatory Health Care Services, in sector 62: Health Care and Social Assistance. ### Which cities in California have the most? Los Angeles (9%), San Francisco (9%) and San Diego (8%) lead among the companies counted. ## Try this prompt Find the people at NAICS 621999 companies in California ```text Use www.enrich.chat to find the operations, IT and finance leaders at companies with NAICS code 621999 in California, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 621999 in Texas](https://enrich.chat/naics/621999/texas/) - [NAICS 621999 in Florida](https://enrich.chat/naics/621999/florida/) - [NAICS 621999 in Illinois](https://enrich.chat/naics/621999/illinois/) - [NAICS 621999 in Colorado](https://enrich.chat/naics/621999/colorado/) - [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/)