Largest primary care groups in Colorado
- Groups
- 575
- Family Medicine groups
- 200
- Nurse Practitioner groups
- 183
- Family physicians
- 1,193
- Nurse practitioner specialists
- 636
There are 575 primary care groups in Colorado with a Medicare PAC ID: 200 family medicine, 183 nurse practitioner, 149 internal medicine, 37 physician assistant and 5 general practice. Cardiac & Thoracic Surgery Associates (CTSA) is the largest family medicine group, with 185 family physicians, and The Little Clinic the largest nurse practitioner group, with 171 nurse practitioner specialists.
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University of Colorado Medicine (CU Medicine) is the largest primary care group in Colorado, with 2,852 physicians
Ranked by physicians with a Colorado address linked to each group. UCHealth Medical Group is second with 1,389, and Colorado Permanente Medical Group third with 1,273. 15 Colorado groups have 100 or more physicians.
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Showing 1 to 10 of 575 primary care groups in Colorado
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
Cardiac & Thoracic Surgery Associates (CTSA) is the largest family medicine group in Colorado, with 185 family physicians
Ranked by family physicians with a Colorado address linked to each group whose main sub-specialty is family medicine. Optumcare Colorado Medical Group is second with 97, and New West Physicians third with 57.
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
The Little Clinic is the largest nurse practitioner group in Colorado, with 171 nurse practitioner specialists
Ranked by nurse practitioner specialists with a Colorado address linked to each group whose main sub-specialty is nurse practitioner. Mentally STRONG is second with 16, and Family Walk-In Clinic third with 15.
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
University of Colorado Medicine (CU Medicine) is the largest internal medicine group in Colorado, with 525 internal medicine specialists
Ranked by internal medicine specialists with a Colorado address linked to each group whose main sub-specialty is internal medicine. UCHealth Medical Group is second with 414, and Colorado Permanente Medical Group third with 322.
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
Creekside Physical Medicine is the largest physician assistant group in Colorado, with 10 physician assistant specialists
Ranked by physician assistant specialists with a Colorado address linked to each group whose main sub-specialty is physician assistant. Falcon Ridge Urgent Care is second with 8, and Three Peaks Urgent Care Aurora third with 7.
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
Magnolia Medical Group is the largest general practice group in Colorado, with 4 general practice specialists
Ranked by general practice specialists with a Colorado address linked to each group whose main sub-specialty is general practice. AFC Urgent Care is second with 1.
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
UCHealth has the most physicians in Colorado primary care groups, with 1,437 across 5 groups
Dmand AI maps every medical group to its parent organization, up to the health system or platform at the top. 25 parent organizations have two or more Colorado primary care groups. Among health systems, CommonSpirit Health has the most groups, 9. Each clinician counts once per parent organization.
See every medical group, site and clinician under UCHealth
Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.
Source: Dmand AI Org Hierarchy Data
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Dmand AI maps the owners, administrators and physician leaders at each of the 575 Colorado primary care groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
61% of Colorado primary care 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.
Colorado primary care groups by ownership
- Independent348
- Health system or hospital65
- Platform or corporate owner69
- Community or government31
- Other organization62
Sites of care beyond their own offices
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Dmand AI maps each group to the health system, physician platform or management company above it, so you can sell to the owner, not one site.
Source: Dmand AI Org Hierarchy Data
98 Colorado primary care groups practice at a hospital site, and 26 at an FQHC
Sites of care linked to each group in the org hierarchy, beyond its own offices. A group can practice at several kinds of site.
Colorado primary care groups by site of care
- Hospitals98
- FQHCs26
- Rural health clinics25
- Ambulatory surgery centers15
- Skilled nursing facilities15
- Behavioral health facilities14
- Hospices10
- Therapy and rehab centers8
- Dialysis centers5
- Home health agencies5
Clinicians in Colorado primary care groups
Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data
Denver has the most primary care groups in Colorado, with 103
More Colorado cities with primary care groups
- Englewood16
- Grand Junction16
- Centennial15
- Greenwood Village14
- Littleton14
- Castle Rock10
- Boulder9
- Durango9
- Highlands Ranch9
- Parker9
- Longmont8
- Montrose7
- Westminster7
- Aspen6
- Louisville6
Source: Doctors and Clinicians National Downloadable File (CMS)
Each Colorado primary care 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 Colorado primary care group list
| 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 inaccuracyRemove my information
Groups whose main specialty is primary care and that have a Medicare PAC ID.
FAQ
Frequently asked questions about primary care groups in Colorado
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is the largest family medicine group in Colorado?
Cardiac & Thoracic Surgery Associates (CTSA), based in Colorado Springs, with 185 family physicians and 1,246 HCPs. Optumcare Colorado Medical Group is second with 97.
What is the largest nurse practitioner group in Colorado?
The Little Clinic, based in Highlands Ranch, with 171 nurse practitioner specialists and 177 HCPs. Mentally STRONG is second with 16.
How many primary care groups are in Colorado?
There are 575 primary care groups in Colorado with a Medicare PAC ID: 200 family medicine, 183 nurse practitioner, 149 internal medicine, 37 physician assistant and 5 general practice. Between them they have 1,193 family physicians, 636 nurse practitioner specialists, 2,576 internal medicine specialists, 95 physician assistant specialists and 5 general practice specialists.
Which companies own the most primary care groups?
By physicians, UCHealth, with 1,437 across 5 groups, followed by CommonSpirit Health with 749 and Intermountain Health with 515.
How many Colorado primary care groups are independent?
348, or 61%, have no larger parent organization in the Dmand AI org hierarchy. 65 belong to a health system or hospital and 69 to a physician platform or corporate owner.
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