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 17 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. Sarah Carpenter, LPCMental Health Counselor1457003014
  2. Alfred Carr, CRNACertified Registered Nurse Anesthetist1487657920
  3. Jennifer Carr, O.D.Optometrist1801867478
  4. Megan Carr, MAMental Health Counselor1740843598
  5. Ann Carrico, PT, MPT, C.PED.Physical Therapist1285780361
  6. Alexandra Carrillo, MA-SLPSpeech-Language Pathologist1063823516
  7. Bianca CarrilloMental Health Counselor1134523806
  8. Jennifer Sarito Carroll, L.AC.Acupuncturist1740438381
  9. Danielle Carron, MSMental Health Counselor1831302595
  10. Patricia Carruth, PSYD, MSWClinical Psychologist1891894390
  11. Karen Carten-Orosel, NPObstetrics & Gynecology Physician1679617476
  12. Dorothy Carter, M.D.Psychiatry Physician1265592281
  13. Jeffrey Carter, M.D.Internal Medicine Physician1457441032
  14. John CarterEmergency Medicine Physician1275516726
  15. Marquis CarterBehavior Analyst1407407042
  16. Kristin Cartledge, PA-CSurgical Physician Assistant1700434644
  17. Annemarie Carzoli, MA, LPCProfessional Counselor1528692522
  18. Lauren Casalino, M.A., L.P.C.Professional Counselor1427370527
  19. Tracy Casault, D.O.Sports Medicine (Family Medicine) Physician1508912197
  20. Alexis Cascino, NPWomen's Health Nurse Practitioner1376256081
  21. Bruce Casey, PH. D.Clinical Psychologist1275662991
  22. Megan Casey, MS, CACIIIAddiction (Substance Use Disorder) Counselor1093097628
  23. Sarah CaseyMental Health Counselor1700236577
  24. Susan CasoProfessional Counselor1336512896
  25. Margaret Caspari, LPCProfessional Counselor1740796861
  26. Miranda Caster, MCN, RDNRegistered Dietitian1558167213
  27. Rafael CastilloSurgical Assistant1225533136
  28. James CastleSpecialist1629448444
  29. Erik Castro, MSW, MPH, SWCMental Health Counselor1609635374
  30. Peter Castro, M.D.Anesthesiology Physician1316986581
  31. Alexa CataldoCounselor1952682510
  32. Attilio Catanzano, MDPsychiatry Physician1518139591
  33. Jennifer Cates, PHD, LMFT, LPCMarriage & Family Therapist1073260543
  34. Anne Cattarello, L.P.C.Professional Counselor1811207236
  35. Michael CavaleriPharmacist1558052688
  36. Kathleen Cebuhar, M.A. LPC, NCCProfessional Counselor1992011274
  37. Lorene Cecilia, LPCProfessional Counselor1164664918
  38. Tara Celentano, LPCCMental Health Counselor1528829272
  39. Ernest CepedaMental Health Counselor1356490874
  40. Abigail Cerne, LPCCounselor1306661368
  41. Christina Cesarz, PT, DPTPhysical Therapist1275185712
  42. Ibrahim Cetindag, M.D.Surgery Physician1447471396
  43. Monika Chace, P.T.Physical Therapist1497998124
  44. David Chagala, OMDAcupuncturist1952365801
  45. Sally Chalfen, PH.D.Clinical Psychologist1184742702
  46. Angela ChallMental Health Counselor1558668897
  47. Thomas Chalmers, MDAnesthesiology Physician1407807423
  48. Christopher Chamberlin, D.D.S.General Practice Dentistry1659433548
  49. Sarah Chambers, BA, RBTBehavior Technician1942855382
  50. Ling ChanMental Health Counselor1194019976

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.