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 62 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. Abigail LubahnMental Health Counselor1497144232
  2. Natasha Lubansky, MSWSocial Worker1881209518
  3. Howard Lubar, M.D.Neurology Physician1366541195
  4. Elisha LucasClinical Psychologist1760544035
  5. Lisa Luciano, PHDMental Health Counselor1073773479
  6. Heather Lucien, LCSWClinical Social Worker1417603721
  7. Jennifer Lucke, AUDAudiologist1356234934
  8. Allegra Ludwig, M.A., CCC-SLPSpeech-Language Pathologist1386156602
  9. Samantha LueckeBehavior Technician1104590918
  10. Zachary Lueders, PA-CPhysician Assistant1801237763
  11. Joshua Luitjohan, DCChiropractor1437645231
  12. Tiana LujanAudiologist1952883704
  13. Elizabeth Lukens, DDS, MSOrthodontics and Dentofacial Orthopedics Dentistry1851120141
  14. Evelyn LukerRegistered Nurse1962874560
  15. Heidi Lukinac, MA LPCCCounselor1417796111
  16. Caitlin LullMental Health Counselor1376921346
  17. Katheryn Lumsden, PHARMDPharmacist1821249608
  18. Giuliana Luna HinojosaClinical Social Worker1376333021
  19. Deborah LundEmergency Medicine Physician1720066095
  20. Jared Lunz, PHARMDPharmacist1538736244
  21. Eve Luong, RDHDental Hygienist1821468877
  22. Anne Luongo, RDN, LDNRegistered Dietitian1407515802
  23. Bridgid Lupetin, MA, LPCCMental Health Counselor1437939170
  24. Rose Lupinacci, LCSWMental Health Counselor1326740994
  25. James Brandon Luter, D.D.S.Oral & Maxillofacial Surgery (D.M.D.)1548689029
  26. Joseph Lutt, M.D.Rheumatology Physician1023233707
  27. Karlee Luttig, MAOrthopedic Assistant1427403039
  28. Rebecca LuttrellProfessional Counselor1659631646
  29. Stanley LyMental Health Counselor1770980872
  30. Brian Lyle, M.D.Cardiovascular Disease Physician1902952989
  31. Natalie Lyle, D.C.Chiropractor1073738662
  32. Anne Lynch, RNRegistered Nurse1093188153
  33. Cecilia Lynch, LCSWClinical Social Worker1639425861
  34. Larkin Lynch, DPTPhysical Therapist1114701737
  35. Michael Lynch, D.C.Chiropractor1184025520
  36. Alexandrea Lyon, D.C.Nutrition Chiropractor1730343963
  37. April Lyons, LPCProfessional Counselor1093112088
  38. Lyndsey Lyons, MAMental Health Counselor1043708597
  39. Robin Lyons, M.A.Mental Health Counselor1497143218
  40. Emmalyn Lysaght, LPCMental Health Counselor1750977070
  41. Alison MaasdorfSpeech-Language Pathologist1003688680
  42. Katherine Macchi, PHARMDPharmacist1023717709
  43. Stephen MacdadeEmergency Medicine Physician1891012688
  44. Michael MacdonaldMental Health Counselor1710116504
  45. Louise Macgregor, RNPsychiatric/Mental Health Registered Nurse1629107438
  46. Andrew Mach, PHARM.D.Pharmacist1053665190
  47. James Machin, FNP-CFamily Nurse Practitioner1912580549
  48. Omarah MaciasRegistered Nurse1316770035
  49. George Macilwinen, M.A., LPC, CAC IProfessional Counselor1770835910
  50. Ashley Maciulaitis, DPTPhysical Therapist1891134789

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.