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 54 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. Mark King, M.D.Infectious Disease Physician1902888746
  2. Monica KingMental Health Counselor1568086783
  3. Paul King, M.D.Diagnostic Radiology Physician1215902770
  4. Victor KingMental Health Counselor1972989390
  5. Amy King-Zipp, MA.,LMFTMarriage & Family Therapist1548476781
  6. Eliza Kingsford, M.A, LPCMental Health Counselor1013218049
  7. Dara KinseyMassage Therapist1093132557
  8. Julie Kintzing, LCSWMental Health Counselor1417961301
  9. Patricia Kintzing, RNCollege Health Registered Nurse1316169014
  10. Linda Kinzeler, PTPhysical Therapist1841225547
  11. Kristen Kirby, DPTNeurology Physical Therapist1053279414
  12. Todd Kirby, AMFTMarriage & Family Therapist1265131742
  13. Andrea Kirchhevel, RDNRegistered Dietitian1619699527
  14. Alex Kirk, PH.D.Clinical Psychologist1679129621
  15. John Kirk, PSY.D.Specialist1851330435
  16. Kristin KirkbrideClinical Social Worker1609129261
  17. Caitlyn Kirkpatrick, ATCAthletic Trainer1487174314
  18. Jan Kirschner, D.C.Chiropractor1831345198
  19. Kevin KiserBehavior Technician1891507182
  20. Jennifer KiskinSpeech-Language Pathologist1720633670
  21. Chad KittlesOrthopedic Physical Therapist1184251662
  22. Elizabeth KlaersClinical Social Worker1003287582
  23. Phyllis Klaif, LCSW, CACIIIClinical Social Worker1659422269
  24. Holly KleiberSpeech-Language Pathologist1063908747
  25. Chelsea Klein, PA-CPhysician Assistant1750949855
  26. Izzy Klein, LMTMassage Therapist1295491355
  27. Joseph Klein, M.A. , LPCProfessional Counselor1346307725
  28. Linda Klein, NPNeonatal Nurse Practitioner1255303780
  29. Margaret Klein, LCSWClinical Social Worker1225444268
  30. Sandra Klein, L.C.S.W.Clinical Social Worker1891935425
  31. Sheila KleinProfessional Counselor1912476409
  32. Timothy Kleinknecht, LCSWClinical Social Worker1821603085
  33. Molly Klekamp, MSW, LCSWClinical Social Worker1740748243
  34. Alexis Klingler, DPTPhysical Therapist1548158934
  35. Rawley Klingsmith, ATCAthletic Trainer1093254245
  36. Erin Klitz, MS, CCC-SLPSpeech-Language Pathologist1366143794
  37. John Kloor, MDOphthalmology Physician1962546671
  38. Samantha KlossAcupuncturist1669019204
  39. Kala Kluender, RN, MSN, CNMMidwife1144504168
  40. Kim Kluger-Bell, MFTMarriage & Family Therapist1265557805
  41. Katherine Klumb, LPCProfessional Counselor1346989241
  42. Charles KnappProfessional Counselor1144618554
  43. Douglas KnappMental Health Counselor1174819551
  44. Ellen Knapp, MA, LPC, GCMMental Health Counselor1154710739
  45. Hedi KnappMarriage & Family Therapist1598569816
  46. Karin Knapp, M.D.Pediatrics Physician1801063433
  47. Katherine Knight, PHDClinical Psychologist1255619334
  48. Sarah Knight, RNChild & Adolescent Psychiatric/Mental Health Registered Nurse1194464842
  49. Deborah Knoll, LCSWClinical Social Worker1366566655
  50. Ava KnoshaugBehavior Technician1871168179

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.