> 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/ # NAICS code 621999: All Other Miscellaneous Ambulatory Health Care Services The companies classified under NAICS 621999, where they are based, how big they are and how the code maps to SIC. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** NAICS 621999 is the code for All Other Miscellaneous Ambulatory Health Care Services, in sector 62: Health Care and Social Assistance. The companies counted under it are mostly very small: 63% have 50 or fewer employees, and 87% are headquartered in the United States. ## What is NAICS 621999? NAICS 621999 is the code for All Other Miscellaneous Ambulatory Health Care Services. It belongs to sector 62: Health Care and Social Assistance. NAICS, the North American Industry Classification System, is the standard U.S. government agencies use to sort businesses by what they mainly do, and each digit narrows the category. Most of the companies counted also carry SIC 8099, Health and allied services, in the older SIC system (96%). - 63% of the companies counted have 50 or fewer employees, and the middle one is in the 11 to 50 range. - The largest group is headquartered in the United States (87%). Within the US, California is the biggest state (14%). - Most were founded in the 2010s (57%), then the 2000s (17%). **Figure: How NAICS 621999 is built.** The code 621999 split into its parts: sector 62, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 621999. Each digit narrows the category.* ## Which companies are classified under NAICS 621999? The biggest by headcount range include CVS Health, Aster DM Healthcare, NYU Langone Health, Health Service Executive and AGS Health. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | [CVS Health](https://enrich.chat/company/cvs-health/) | Woonsocket, RI | 10,001+ | | [AGS Health](https://enrich.chat/company/ags-health/) | Washington, DC | 10,001+ | | [Baptist Health](https://enrich.chat/company/baptist-health/) | Coral Gables, FL | 10,001+ | | [TeamHealth](https://enrich.chat/company/teamhealth/) | Knoxville, TN | 10,001+ | | King's College Hospital Nhs Foundation Trust | London, United Kingdom | 10,001+ | | [Jabil](https://enrich.chat/company/jabil/) | St. Petersburg, FL | 10,001+ | | [WellSpan Health](https://enrich.chat/company/wellspan-health/) | York, PA | 10,001+ | | Amerihealth Caritas | Philadelphia, PA | 10,001+ | | [UAB - The University of Alabama at Birmingham](https://enrich.chat/company/uab-the-university-of-alabama-at-birmingham/) | Birmingham, AL | 10,001+ | | Scl Health | Broomfield, CO | 10,001+ | | [UofL Health](https://enrich.chat/company/uofl-health/) | Louisville, KY | 10,001+ | | Mission Health | Asheville, NC | 10,001+ | | Umass Memorial Health | Worcester, MA | 10,001+ | | [McLeod Health](https://enrich.chat/company/mcleod-health/) | Florence, SC | 10,001+ | | Altamed Health Services | Los Angeles, CA | 5,001 to 10,000 | | Hampshire Hospitals Nhs Foundation Trust | Hampshire, United Kingdom | 5,001 to 10,000 | | Portsmouth Hospitals University Nhs Trust | Portsmouth, United Kingdom | 5,001 to 10,000 | | North West Ambulance Service Nhs Trust | Manchester, United Kingdom | 5,001 to 10,000 | | Virgin Care | London, United Kingdom | 5,001 to 10,000 | | Torbay And South Devon Nhs Foundation Trust | Torquay, United Kingdom | 5,001 to 10,000 | | Leicestershire Partnership Nhs Trust | Leicester, United Kingdom | 5,001 to 10,000 | | Beecan Health | Glendale, CA | 5,001 to 10,000 | | [Nuvance Health](https://enrich.chat/company/nuvance-health/) | Lagrangeville, NY | 5,001 to 10,000 | | United Lincolnshire Hospitals Nhs Trust | Lincolnshire, United Kingdom | 5,001 to 10,000 | | The London Clinic | London, United Kingdom | 1,001 to 5,000 | 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. ## Where are NAICS 621999 companies based? The largest groups are headquartered in the United States (87%), the United Kingdom (9%) and India (1%). **Figure: Where companies in NAICS 621999 are based.** Bars for the share of counted companies in NAICS 621999 headquartered in each country: United States 87%, United Kingdom 9%, India 1%. *Share of counted companies in NAICS 621999 by headquarters country.* Within the United States, California (14%), Texas (10%) and Florida (8%) lead. **Figure: US headquarters of companies in NAICS 621999, by state.** A tile map of the United States shaded by the share of counted US companies in NAICS 621999 headquartered in each state. The largest are California 14%, Texas 10%, Florida 8%. *Share of counted US companies in NAICS 621999 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for NAICS 621999? 63% of them 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 companies in NAICS 621999.** Seven columns for the share of counted companies in NAICS 621999 in each employee range: 11 to 50 63%, 51 to 200 21%, 201 to 500 6%, 501 to 1,000 3%, 1,001 to 5,000 4%, 5,001 to 10,000 1%, 10,001+ 1%. *Share of counted companies in NAICS 621999 in each employee range.* ## How old are NAICS 621999 companies? Most were founded in the 2010s (57%), then the 2000s (17%). **Figure: When companies in NAICS 621999 were founded.** Eight columns for the share of counted companies in NAICS 621999 founded in each era: Before 1960 3%, 1960s 1%, 1970s 2%, 1980s 4%, 1990s 8%, 2000s 17%, 2010s 57%, 2020s 9%. *Share of counted companies in NAICS 621999 by the era they were founded in, for the ones that list a founding year.* ## How NAICS 621999 compares - 66% were founded in 2010 or later, against 30% across all NAICS codes on this site. ## How do NAICS 621999 companies describe themselves? A code is assigned by classification, and a company does not choose its own, so the label a company uses for itself can differ. The most common labels here are Hospitals and Health Care (41%), Medical Practices (23%) and Wellness and Fitness Services (14%). **Figure: How companies in NAICS 621999 describe themselves.** Bars for the share of counted companies in NAICS 621999 that give each industry on their public profile: Hospitals and Health Care 41%, Medical Practices 23%, Wellness and Fitness Services 14%, Mental Health Care 10%, Medical Equipment Manufacturing 5%, Health; Wellness and Fitness 5%. *Share of counted companies in NAICS 621999 by the industry they list on their public profile.* ## NAICS 621999 and the SIC system NAICS replaced SIC in 1997, but the two do not line up one to one: companies filed under one NAICS code can carry several SIC codes. These are the ones seen most. | Code | Title | Share of counted | | --- | --- | --- | | SIC 8099 | Health and allied services | 96% | | [SIC 8011](https://enrich.chat/naics/621111/) | Medical doctor's office | 2% | ## Where NAICS codes come from NAICS is maintained by the U.S. Census Bureau with Canada and Mexico and revised every five years; the current edition is NAICS 2022. To check exactly what a code includes, search the [official NAICS index](https://www.census.gov/naics/) or read the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html). Pick a code by what a company mostly does, not by who it sells to. ## How do you reach the people at NAICS 621999 companies? The people to talk to are usually operations, IT and finance leaders. You can build the list from this code 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 (All Other Miscellaneous Ambulatory Health Care Services) ``` ### 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, 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 Codes next to it: [NAICS 621910: Ambulance Services](https://enrich.chat/naics/621910/)[NAICS 621991: Blood and Organ Banks](https://enrich.chat/naics/621991/) Others in sector 62: [NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/)[NAICS 621210: Offices of Dentists](https://enrich.chat/naics/621210/)[NAICS 621610: Home Health Care Services](https://enrich.chat/naics/621610/)[NAICS 621498: All Other Outpatient Care Centers](https://enrich.chat/naics/621498/)[NAICS 622110: General Medical and Surgical Hospitals](https://enrich.chat/naics/622110/)[NAICS 621340: Offices of Physical, Occupational and Speech](https://enrich.chat/naics/621340/)[NAICS 623990: Other Residential Care Facilities](https://enrich.chat/naics/623990/)[NAICS 621310: Offices of Chiropractors](https://enrich.chat/naics/621310/) NAICS 621999 by state: [California](https://enrich.chat/naics/621999/california/)[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/) ## Frequently asked questions ### What is NAICS code 621999? NAICS 621999 is the code for All Other Miscellaneous Ambulatory Health Care Services, in sector 62: Health Care and Social Assistance. ### What is the SIC code for NAICS 621999 (All Other Miscellaneous Ambulatory Health Care Services)? 96% of the companies counted carry SIC 8099 (Health and allied services), but the two systems do not map one to one. ### Which companies are classified under NAICS 621999? The biggest by headcount range include CVS Health, Aster DM Healthcare, NYU Langone Health, Health Service Executive and AGS Health. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 621999 companies based? The largest groups are headquartered in the United States (87%), the United Kingdom (9%) and India (1%). ### How big are the companies in NAICS 621999? 63% 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. ### Is NAICS 621999 the same as a SIC code? No. NAICS replaced SIC as the U.S. federal standard in 1997, and the two do not map one to one. The SIC code seen most among these companies is 8099. ## Try this prompt Find the people at NAICS 621999 companies ```text Use www.enrich.chat to find the operations, IT and finance leaders at companies with NAICS code 621999, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 621910](https://enrich.chat/naics/621910/) - [NAICS 621991](https://enrich.chat/naics/621991/) - [NAICS 621999 in California](https://enrich.chat/naics/621999/california/) - [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/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)