Health maintenance organizations in the United States
- Health maintenance organizations
- 288
- Linked to a hospital or group
- 14
- Hospitals with a health maintenance organization
- 9
- Medical groups with a health maintenance organization
- 7
- States and territories
- 39
There are 288 health maintenance organizations in the US. California has the most, 62, and Enloe Health has the most affiliated health maintenance organizations of any hospital, 1. 100% finished medical school 30 or more years ago.
Find work emails and mobile numbers for all 288 US health maintenance organizations
Validated work emails and mobile numbers for US health maintenance organizations, found through healthcare waterfall enrichment, with a free Dmand AI account.
California has the most health maintenance organizations, with 62
There are 288 health maintenance organizations in the US, according to Dmand AI data. Florida is second with 33, and New York third with 26.
Health maintenance organizations in every other state and territory
- Virginia7
- Puerto Rico6
- Louisiana5
- New Mexico5
- Massachusetts5
- South Carolina5
- Pennsylvania5
- Maryland4
- Nevada4
- New Jersey4
- Wisconsin4
- Tennessee4
- Missouri3
- Arizona3
- Alaska2
- Oklahoma2
- Washington2
- Illinois2
- Indiana2
- Hawaii2
- Alabama2
- Minnesota2
- Maine1
- Connecticut1
- Mississippi1
- South Dakota1
- Kansas1
- Kentucky1
- Delaware1
Source: NPPES NPI Registry (CMS)
For health IT teams
Dmand AI has the EHR for 54 of 288 US health maintenance organizations, at their hospital and their practice. Filter by Epic, Oracle Health, MEDITECH, athenahealth and more, then reach them with validated work emails and mobile numbers.
Southern California Permanente Medical Group has the most health maintenance organizations of any US medical group, with 7
The Permanente Medical Group, Inc. is second with 4, and Harbor-UCLA Medical Center third with 1. Counts are health maintenance organizations linked to each group.
Sources: Dmand AI Affiliation Data and Dmand AI Org Hierarchy Data
Enloe Health has the most affiliated health maintenance organizations of any US hospital, with 1
Kaiser Permanente South San Francisco Medical Center is second with 1, and MarinHealth Medical Center third with 1. US health maintenance organizations are affiliated with 9 hospitals in all.
See every hospital and group for each US health maintenance organization
Each public profile names one place a health maintenance organization practices. A free account shows all of them, with the employer, the EHR and validated contacts.
Source: Dmand AI Affiliation Data
Group practices and clinics are the most common site of care for US health maintenance organizations, with 7
6 also practice at hospitals, and 1 at fqhcs. A health maintenance organization can practice at several kinds of site, so the shares overlap.
US health maintenance organizations by site of care
- Medical group practices7
- Hospitals6
- FQHCs1
Sources: Dmand AI Affiliation Data and Dmand AI Practice Data
100% of US health maintenance organizations finished medical school 30 or more years ago
1 of the 1 US health maintenance organizations with a graduation year on file. 0 graduated in the last 10 years, fewer than graduated 40 or more years ago.
Physicians by years since medical school
- Under 10 years ago0
- 10 to 19 years ago0
- 20 to 29 years ago0
- 30 to 39 years ago0
- 40 or more years ago1
Source: Dmand AI Professional Profile Data
Every US health maintenance organization profile shows current hospitals and groups, Medicare activity and NPI details
- Primary practiceThe main place they practice, with its type and cityOn every profile
- Every site of careEach hospital, clinic and group where they practice nowWith a free account
- EmployerThe organization they work for, when one is on fileWith a free account
- Medicare servicesServices and procedure codes billed to Medicare, from CMSOn every profile
- Medicare Part D prescribingClaims and drug costs from Part D, from CMSOn every profile
- Industry paymentsPayments from drug and device makers, from CMS Open PaymentsOn every profile
- Publications and clinical trialsResearch papers and trials linked to the NPI, when on fileOn every profile
- Licenses and graduation yearState license numbers and medical school graduation yearOn every profile
- NPI detailsNPI, enumeration date, primary taxonomy and practice addressOn every profile
- Work email and mobile numberFound on request through healthcare waterfall enrichment, then validatedWith a free account
- EHR in useThe EHR at each site where they practiceWith a free account
- Colleagues at each siteThe clinicians they work with at each hospital and groupWith a free account
Free account: 30 days free, self-serve, no credit card.
Sources: NPPES NPI Registry (CMS), Medicare Physician & Other Practitioners (CMS), Open Payments (CMS) and Dmand AI Affiliation Data
Sources for the US health maintenance organization directory
| Data on this page | Source |
|---|---|
| HCPs, types and specialties | NPPES NPI Registry (CMS) and Dmand AI Professional Profile Data |
| Sites of care, hospitals and medical groups | Dmand AI Affiliation Data |
| Medical school graduation year | Dmand AI Professional Profile Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
Health maintenance organizations are HCPs whose primary specialty is health maintenance organization (taxonomy code 302R00000X), with an active NPI and a US practice address.
FAQ
Frequently asked questions about health maintenance organizations in the US
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many health maintenance organizations are in the US?
288 health maintenance organizations have an active NPI, a US practice address and health maintenance organization (taxonomy code 302R00000X) as their primary specialty. 14 of them are linked to a hospital or medical group.
Which state has the most health maintenance organizations?
California, with 62, followed by Florida with 33 and New York with 26.
Which medical groups have the most health maintenance organizations?
Southern California Permanente Medical Group, with 7, followed by The Permanente Medical Group, Inc. with 4 and Harbor-UCLA Medical Center with 1.
Which hospitals have the most health maintenance organizations?
Enloe Health, with 1 affiliated health maintenance organizations, followed by Kaiser Permanente South San Francisco Medical Center with 1 and MarinHealth Medical Center with 1.
How many US health maintenance organizations finished medical school 30 or more years ago?
1 of the 1 with a graduation year on file, or 100%. 0 graduated in the last 10 years.
What is the taxonomy code for health maintenance organization?
302R00000X is the NPPES taxonomy code for health maintenance organization. Sub-specialties with their own code are counted on their own lists.
Dmand AI
Find the right contacts among US health maintenance organizations
Search 288 US health maintenance organizations by state, hospital, medical group and the EHR they use, with validated work emails and mobile numbers.
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