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 65 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. Rachael MartinMental Health Counselor1487361374
  2. Susan Martin, PHARMDPharmacist1588606693
  3. Renee Martin-Willett, PHDClinical Psychologist1164105623
  4. Jessica Martindale, LMFT, IN CAMarriage & Family Therapist1538997176
  5. Carissa Martinez, FNPNurse Practitioner1982126595
  6. Christine Martinez, MA LPCProfessional Counselor1225156656
  7. Gene Martinez, CMTMassage Therapist1497934244
  8. Giana MartinezBehavior Technician1497674352
  9. Herberth MartinezBehavior Technician1114523438
  10. Jessica MartinezFamily Nurse Practitioner1699515148
  11. Laurel MartinezBehavior Analyst1912597212
  12. Melissa MartinezCounselor1215429626
  13. Lesley Martinez-Ortiz, RBTBehavior Technician1093547465
  14. Kathleen Marx, CMAFamily Medicine Physician1184504045
  15. Shannon MaryjanowskiPharmacy Technician1770973562
  16. Grant Marylander, LSWClinical Social Worker1578244331
  17. Donald Maschka, M.D.Otolaryngology Physician1316933484
  18. Leanne MasiMental Health Counselor1770128886
  19. Smrity MaskeyMental Health Counselor1184957185
  20. Nikolas Maslow, M.A., LPC, CGPProfessional Counselor1205110632
  21. Christine Mason, PHDPsychologist1932126539
  22. Jeremy Mason, MA, LPCCMental Health Counselor1174314074
  23. Andrea Master, COTAOccupational Therapy Assistant1043619976
  24. Daniel Master, M.D.Orthopaedic Hand Surgery Physician1770798795
  25. Marjorie Mateer, RNRegistered Nurse1205123908
  26. Vlad Matei, MDRetina Specialist (Ophthalmology) Physician1922397819
  27. Bryce MathernMental Health Counselor1093093288
  28. Brian MathewsMental Health Counselor1538489323
  29. Lydia Mathis, LPCMental Health Counselor1780355867
  30. Lynda Mathis, PH.D.Clinical Psychologist1336431998
  31. Catherine Mathon, MBA MA, LPCMental Health Counselor1548773542
  32. Dina Matic, PH.D.Clinical Psychologist1275941080
  33. Kristen Matoba, DPTPhysical Therapist1538594627
  34. Maria Matos, MDChild & Adolescent Psychiatry Physician1730109927
  35. Taya MatoyMental Health Counselor1801143557
  36. Mollie MatsonStudent in an Organized Health Care Education/Training Program1225545098
  37. Gordon Matsuda, MDUrology Physician1679551204
  38. Ann Mattson, MDGynecology Physician1912085952
  39. Erika Mattson, PA-CPhysician Assistant1386482719
  40. Lynette Mauge Marshall, RNRegistered Nurse1558469031
  41. Kelsey MaxfieldCounselor1881523843
  42. Justin Maxhimer, M.D.Plastic Surgery Physician1720138639
  43. Julia Maximon, MDPsychiatry Physician1326194937
  44. Jules MaxwellSpeech-Language Pathologist1568938959
  45. Darrick May, MDPsychiatry Physician1841424603
  46. Travis May, LPCCCounselor1639030661
  47. Lindsey MayerOrthopedic Physical Therapist1104432285
  48. Sara Mayer, MSW/LCSWClinical Social Worker1760572572
  49. Anna MaynardClinical Social Worker1104194067
  50. Melissa Mayne, M.A.Mental Health Counselor1558784355

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.