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 63 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. Kelly Mack, SLPSpeech-Language Pathologist1578896460
  2. Lindsey Mack, PT, DPTPediatric Physical Therapist1053556787
  3. Megan MackAdvanced Practice Midwife1528550605
  4. Michael MackAddiction (Substance Use Disorder) Counselor1114333796
  5. Megan Mackenzie, LCSWClinical Social Worker1043825672
  6. Katherine MacnairMental Health Counselor1821384611
  7. Mary Macsalka, M.D.Gynecology Physician1205942422
  8. Sharla Macy, LMFTMarriage & Family Therapist1407877525
  9. Michelle MaczkaMental Health Counselor1235505546
  10. Jadyn Madden, LPC ASSOCIATEMental Health Counselor1285349183
  11. Liesel Maddox, RDNRegistered Dietitian1225646839
  12. Maria Madjar, CCC-SLPSpeech-Language Pathologist1013789841
  13. Satori MadroneMental Health Counselor1376935114
  14. Alexandria Maffitt, LCSWClinical Social Worker1487985925
  15. Morgan Magill, BCBABehavior Analyst1679168199
  16. Palmer Mahal, MA, LPCCProfessional Counselor1447144118
  17. Bryan Mahan, D.O.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1134159023
  18. Michael Mahan, PT, DPTPhysical Therapist1063921476
  19. Elizabeth Maher, LPCProfessional Counselor1477019222
  20. Fayiz Mahgoub, ODStudent in an Organized Health Care Education/Training Program1376202861
  21. Barbara Mahler, BARBARA MAHLER O.M.Acupuncturist1326292285
  22. Julia MahlerPharmacist1831992833
  23. Elizabeth Mahon, PTPhysical Therapist1861612962
  24. Barbara Maiberger, MA LPCProfessional Counselor1013090711
  25. Danielle MaidaSocial Worker1578818316
  26. Myriam Maida, LPCCMental Health Counselor1174037337
  27. Olivia MainAthletic Trainer1235994211
  28. Krystel MairsProfessional Counselor1992535140
  29. Anne Majewski, DPTPhysical Therapist1649080409
  30. Maureen Makar, M.S.W.Social Worker1831254895
  31. Erik Makineni, PHARM. D.Pharmacist1982904470
  32. Kathryn Makowski, PASurgical Physician Assistant1962241760
  33. Eva Malanowski, PSY.D.Clinical Psychologist1164755021
  34. Janine MalcolmNaturopath1255662755
  35. Rebekah Maldonado, NONEBehavior Analyst1366194979
  36. Krista Malek, MAMental Health Counselor1861820185
  37. Nicholas MalerneeAddiction (Substance Use Disorder) Counselor1992106603
  38. Alyssa Malito, MAMental Health Counselor1447580667
  39. Kathleen Malone, LPCProfessional Counselor1982108858
  40. Robert Maltz, B.A.Mental Health Counselor1477941284
  41. Alicia Maltzman, N.P.Family Nurse Practitioner1710960380
  42. Diana Mancini, MDInternal Medicine Physician1619990090
  43. Francine Mandel Sheets, RNRegistered Nurse1174230593
  44. Sunanda ManePhysical Therapist1386823128
  45. Marinela Maneiro-GoodwinMental Health Counselor1063863116
  46. Erin Mang, DPTPhysical Therapist1306473483
  47. Mary MangelsenMental Health Counselor1164778395
  48. David MangineOccupational Therapist1033508668
  49. Christine Mangum, LPCProfessional Counselor1740657865
  50. Samantha MangumMental Health Counselor1942593694

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.