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 107 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. Leah Wallerstein, M.A.Mental Health Counselor1417236209
  2. Sean Wallis, NPNurse Practitioner1356980205
  3. Lucas WalljasperMental Health Counselor1891414835
  4. Carol WallmanNeonatal Nurse Practitioner1548248008
  5. Justin Walmsley, LAC, MFTCMarriage & Family Therapist1285273318
  6. Jennifer Walsh, RNC, MS, WHCNPWomen's Health Nurse Practitioner1710086285
  7. Ari Walter, MDSleep Medicine (Family Medicine) Physician1922669431
  8. Trudy Walter, MA LPCCounseling Psychologist1982727954
  9. Kerri Walters, PHARMD., RPH.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1982910451
  10. Dale WangEmergency Medicine Physician1801872619
  11. Isaac WangSpeech-Language Pathologist1518525559
  12. Diane Ward, O.T.R.Occupational Therapist1467660795
  13. Emily Ward, M.D.Gastroenterology Physician1093927055
  14. Jonathan Ward, M.D.Clinical Ethicist1558702423
  15. Katherine Ward, L.C.S.W.Clinical Social Worker1194942730
  16. Molly Ware, MDCardiovascular Disease Physician1700863545
  17. Emily Warm, MDPediatrics Physician1073623856
  18. Theodore Warm, MDAnesthesiology Physician1881620391
  19. Alexandra WarnerMental Health Counselor1992112601
  20. Brian Warner, DMDEndodontics1356577381
  21. Elizabeth Warren, M.A.Mental Health Counselor1376755256
  22. James Warren, M.D.Otolaryngology Physician1194743450
  23. Marshelle Warren, M.D.Allergy & Immunology Physician1669859161
  24. Michele Warren, LPNLicensed Practical Nurse1992932511
  25. Samantha Warren, AU.D.Audiologist1235553199
  26. Brittany WarsingBehavior Analyst1194185298
  27. Marya WashburnMental Health Counselor1386061539
  28. Alan Wasserman, DDSGeneral Practice Dentistry1225144496
  29. Tuesday Wasserman, L.AC.Acupuncturist1225330186
  30. James Waters, PH.D.Clinical Neuropsychologist1417042516
  31. Lindsey WatersMental Health Counselor1548930118
  32. Stuart Watkins, LPTMental Health Counselor1932239027
  33. Josh Watson, LMTMassage Therapist1740877570
  34. Karen Watson, MA, CCC-SLPSpeech-Language Pathologist1710175047
  35. Clifford Watts, M.D.Emergency Medicine Physician1174507792
  36. Lauren Watts, D.D.S.General Practice Dentistry1134351620
  37. Sharlie Watts, LCSWClinical Social Worker1699910612
  38. Lisa Waugh, RNRegistered Nurse1194727784
  39. Nicole Weakley, PHARMDPharmacist1942173927
  40. Ann WeatherbyClinical Social Worker1720545148
  41. Anne WeatherleyMarriage & Family Therapist1376995373
  42. Germaine Weaver, PTPhysical Therapist1215965389
  43. Lauren Weaver, P.A.Physician Assistant1073887121
  44. Deborah WebbMental Health Counselor1750520987
  45. Karla WebbSocial Worker1821494956
  46. Skylyn Webb, MA, LPCCMental Health Counselor1104531524
  47. Bonnie Webber, RNFAAmbulatory Care Registered Nurse1467464958
  48. Shannon WebberCritical Care Medicine Registered Nurse1295453199
  49. Ben WeberBehavior Analyst1104465335
  50. Christina Weber, DPMPodiatrist1790746170

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.