NPPES file of Aug 9, 2026

Doctors and health care providers in Greeley, CO

3,518 individual NPPES records list a practice address in Greeley, 9th of 193 Colorado cities. The largest group is mental health counselor: 346, 10% of the city's records, against 6% across Colorado. Page 47 of 71.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Greeley

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Greeley in Colorado

  • Rank in Colorado9th of 193 cities by records
  • Share of the state2.4% of Colorado's records
  • Specialties present25 or more taxonomy codes
  • Top three groups22.6% of all records
  • Mental Health Counselor rank8th of the 10 Colorado cities with the most

Compared with Colorado as a whole, Greeley has 22.7× the state's share of community health worker records and 0.58× its share of clinical social worker records.

Providers in Greeley, alphabetically

  1. Cullen O'HearneBehavior Technician1932036019
  2. Krista O'Leary, CNMAdvanced Practice Midwife1225084726
  3. Danielle O'MalleyMental Health Counselor1851408793
  4. Melissa O'Malley, BADoula1336544402
  5. Adam O'Mara, D.O.Emergency Medicine Physician1609161512
  6. Jean Pierre O'Neal, MDSpecialist1750376885
  7. John O'RandStudent in an Organized Health Care Education/Training Program1669919411
  8. Julia O'RiordanCommunity Health Worker1144103052
  9. Linda O'Shea, MA LPCProfessional Counselor1699865766
  10. Diana Oaks, M.A., CCC-A, FAAAAudiologist1437295235
  11. Gregory ObermannGeneral Practice Dentistry1013132737
  12. Mary Obrien, DOFamily Medicine Physician1699860296
  13. Catherine Ocasio, LCSW, LAC, MACClinical Social Worker1609975101
  14. Christina OchoaSocial Worker1548476112
  15. Cora OchoaPeer Specialist1790252153
  16. Leah Ochsner, M.S., CCC-SLPSpeech-Language Pathologist1730957069
  17. Mandy OdegaardWound Care Registered Nurse1689500183
  18. Annette Odell, FNPFamily Nurse Practitioner1760479810
  19. Jason Ogren, MDSurgery Physician1275574758
  20. Kristi Ogren, NPPsychiatric/Mental Health Nurse Practitioner1730062977
  21. Ahonsi OhimaiStudent in an Organized Health Care Education/Training Program1780340075
  22. Abdulbaril Olagunju, M.D.Cardiovascular Disease Physician1194341131
  23. Kenneth Olds, MDFamily Medicine Physician1548235468
  24. William Oligmueller, MDFamily Medicine Physician1134107865
  25. Vanessa OlivasBehavior Technician1164157707
  26. Julia Olsen, DOFamily Medicine Physician1851085328
  27. Darin OlsonSpeech-Language Pathologist1447028360
  28. Heather Olson, LSWSocial Worker1639095466
  29. Jamie Olson, OTR/LOccupational Therapist1740611169
  30. Julie Olson, M.S. CCC-SLPSpeech-Language Pathologist1295503597
  31. Kathryn OlsonAthletic Trainer1760856850
  32. Ashley Onderlinde, PEERCommunity Health Worker1093171779
  33. Mary OnealCommunity Health Worker1891491759
  34. Michaela Onkka, PT, DPTPhysical Therapist1134645328
  35. Margaret OntiverosCounselor1841664182
  36. Naw OphiCommunity Health Worker1417629429
  37. Connie Oravitz, LCSWClinical Social Worker1255303665
  38. Genesis OrellanaCommunity Health Worker1497231120
  39. Brandi Oreskovich, LMT, MMPMassage Therapist1114229788
  40. Garrett Orick, MDStudent in an Organized Health Care Education/Training Program1538000161
  41. Kathryn Orion, LCSWClinical Social Worker1538500764
  42. Patricia Orleans, LCSWClinical Social Worker1396832176
  43. Karla Ornelas, FNPNurse Practitioner1023321981
  44. Claudia OrozcoMental Health Counselor1417407818
  45. Jason Orozco, PHARMDPharmacist1679136337
  46. Samantha Orozco, R.N., B.S.N.Registered Nurse1275765315
  47. Bianca Ortega, MA, BCBABehavior Analyst1447126032
  48. Elizabeth Ortega, LSWClinical Social Worker1912702135
  49. Isabel Ortega, CAC IIIAddiction (Substance Use Disorder) Counselor1396172037
  50. Mayra OrtegaCommunity Health Worker1942078936

The largest Colorado cities

  1. Denver25,068
  2. Colorado Springs19,771
  3. Aurora17,400
  4. Fort Collins6,928
  5. Boulder5,635

All of Colorado →

How to read this directory

Greeley, Colorado appears in the CMS National Plan and Provider Enumeration System with 3,518 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Greeley - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Greeley practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Greeley is weighted toward Mental Health Counselor (346 clinicians, followed by Community Health Worker with 235 and Student in an Organized Health Care Education/Training Program with 215). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Colorado's population, Greeley reports roughly 59.9 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

For Greeley patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Greeley, CO?

There are 3,518 registered healthcare providers in Greeley, CO, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Greeley?

The most common specialties in Greeley are Mental Health Counselor, Community Health Worker, Student in an Organized Health Care Education/Training Program, Behavior Technician, Professional Counselor. Mental Health Counselor has the most providers with 346.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.