NPPES file of Aug 9, 2026

Doctors and health care providers in Boulder, CO

5,635 individual NPPES records list a practice address in Boulder, 5th of 193 Colorado cities. The largest group is mental health counselor: 1,009, 18% of the city's records, against 6% across Colorado. Page 75 of 113.

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

The 8 largest groups in Boulder

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

Boulder in Colorado

  • Rank in Colorado5th of 193 cities by records
  • Share of the state3.8% of Colorado's records
  • Specialties present25 or more taxonomy codes
  • Top three groups29.4% of all records
  • Mental Health Counselor rank2nd of the 10 Colorado cities with the most

Compared with Colorado as a whole, Boulder has 3.9× the state's share of acupuncturist records and 0.47× its share of behavior technician records.

Providers in Boulder, alphabetically

  1. Jonathan Nienhouse, FNPFamily Nurse Practitioner1841388402
  2. Jamie Niesen, M.A.Mental Health Counselor1164666285
  3. Alenna Nilsen, MA OF TEACHINGMedical Physician Assistant1134883515
  4. Susan Nimmanheminda, PHD, LCSW, CASClinical Social Worker1649990920
  5. Alex NimmerMental Health Counselor1326731639
  6. Abigail NippMarriage & Family Therapist1134911498
  7. Daniel NishinaMental Health Counselor1659527521
  8. Amy NitchmanHealth Educator1295378149
  9. Franklin NkemPsychiatric/Mental Health Nurse Practitioner1790553972
  10. Jenna NoahMental Health Counselor1871841536
  11. Susan Nofziger, MSW, LCSWClinical Social Worker1588770218
  12. Adele Noll, P.T.Physical Therapist1740372283
  13. Ann Noonan, LPC, CAC IIIProfessional Counselor1467875781
  14. Hilary Norberg, RDH, BSDental Hygienist1609208305
  15. Lynn NorbergAcupuncturist1902025356
  16. Emily NorburyMental Health Counselor1922740968
  17. Adam NordhoyBehavior Technician1487386199
  18. Robyn Nordstrom Lane, M.D.Family Medicine Physician1902028079
  19. Laura Norman, PAPhysician Assistant1477110765
  20. Kristina Normann, LCSW, LACClinical Social Worker1932416351
  21. Kimberly NorquistDental Hygienist1548629439
  22. Ann Norris, MSW, LCSWMental Health Counselor1427196690
  23. Gregory Norris, DDSOrthodontics and Dentofacial Orthopedics Dentistry1902972383
  24. Jennifer Norton, PH.D.Clinical Psychologist1285751396
  25. Gloria NouelMental Health Counselor1699023317
  26. Sepeideh Nouhi, MDFamily Medicine Physician1689757213
  27. Sandra Novak, MS, MA, SEP, LPCProfessional Counselor1225352412
  28. Joanna Nowakowski, NPFamily Nurse Practitioner1326452376
  29. Brooke NullMental Health Counselor1285202267
  30. Kathy Nunemaker, M.A.Speech-Language Pathologist1083756639
  31. Nancy Nunes, L.C.S.W.Clinical Social Worker1437594157
  32. Tamra NunezNurse's Aide1790631018
  33. Rachel Nussbaum, L.AC.Acupuncturist1407495914
  34. Christopher Nusser, M.D.Diagnostic Radiology Physician1538152038
  35. Anil Nutakki, D.D.S.General Practice Dentistry1427316215
  36. Nathaniel Nutter, DCInternist Chiropractor1942822838
  37. Richard Nuzzi, DCChiropractor1225155294
  38. Helen Nychka, M.S.Speech-Language Pathologist1801928098
  39. Lana Nye, LCSWClinical Social Worker1780167825
  40. Elinor Nygren, LPCMental Health Counselor1336364009
  41. John O'Brien, PSYDMental Health Counselor1073921649
  42. Shani O'BrienSpeech-Language Pathologist1023844115
  43. Sophia O'ConnorMental Health Counselor1295186542
  44. Catherine O'Day, LCSWClinical Social Worker1649486218
  45. Kristen O'Kelly, LPCC, CASProfessional Counselor1699473058
  46. Ryan O'Millian, LPCCMental Health Counselor1063029510
  47. Christine O'Neill, M.S.Mental Health Counselor1164541827
  48. Diana O'Riordan VerschoorMental Health Counselor1154192789
  49. Glenda O'Rourke, LPCCounselor1003067083
  50. Renee O'Shea, FNPFamily Nurse Practitioner1578619854

The largest Colorado cities

  1. Denver25,068
  2. Colorado Springs19,771
  3. Aurora17,400
  4. Fort Collins6,928
  5. Lakewood4,944

All of Colorado →

How to read this directory

Boulder, Colorado appears in the CMS National Plan and Provider Enumeration System with 5,635 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 Boulder - 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 Boulder 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 Boulder is weighted toward Mental Health Counselor (1,009 clinicians, followed by Professional Counselor with 334 and Clinical Social Worker with 316). 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, Boulder reports roughly 95.9 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.

Of Colorado's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Boulder practice address, a coverage gap Boulder patients typically fill by traveling to a larger nearby hub.

For Boulder 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 Boulder, CO?

There are 5,635 registered healthcare providers in Boulder, CO, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Boulder?

The most common specialties in Boulder are Mental Health Counselor, Professional Counselor, Clinical Social Worker, Physical Therapist, Behavior Technician. Mental Health Counselor has the most providers with 1,009.

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.