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 65 of 113.
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
- Rachael MartinMental Health Counselor1487361374
- Susan Martin, PHARMDPharmacist1588606693
- Renee Martin-Willett, PHDClinical Psychologist1164105623
- Jessica Martindale, LMFT, IN CAMarriage & Family Therapist1538997176
- Carissa Martinez, FNPNurse Practitioner1982126595
- Christine Martinez, MA LPCProfessional Counselor1225156656
- Gene Martinez, CMTMassage Therapist1497934244
- Giana MartinezBehavior Technician1497674352
- Herberth MartinezBehavior Technician1114523438
- Jessica MartinezFamily Nurse Practitioner1699515148
- Laurel MartinezBehavior Analyst1912597212
- Melissa MartinezCounselor1215429626
- Lesley Martinez-Ortiz, RBTBehavior Technician1093547465
- Kathleen Marx, CMAFamily Medicine Physician1184504045
- Shannon MaryjanowskiPharmacy Technician1770973562
- Grant Marylander, LSWClinical Social Worker1578244331
- Donald Maschka, M.D.Otolaryngology Physician1316933484
- Leanne MasiMental Health Counselor1770128886
- Smrity MaskeyMental Health Counselor1184957185
- Nikolas Maslow, M.A., LPC, CGPProfessional Counselor1205110632
- Christine Mason, PHDPsychologist1932126539
- Jeremy Mason, MA, LPCCMental Health Counselor1174314074
- Andrea Master, COTAOccupational Therapy Assistant1043619976
- Daniel Master, M.D.Orthopaedic Hand Surgery Physician1770798795
- Marjorie Mateer, RNRegistered Nurse1205123908
- Vlad Matei, MDRetina Specialist (Ophthalmology) Physician1922397819
- Bryce MathernMental Health Counselor1093093288
- Brian MathewsMental Health Counselor1538489323
- Lydia Mathis, LPCMental Health Counselor1780355867
- Lynda Mathis, PH.D.Clinical Psychologist1336431998
- Catherine Mathon, MBA MA, LPCMental Health Counselor1548773542
- Dina Matic, PH.D.Clinical Psychologist1275941080
- Kristen Matoba, DPTPhysical Therapist1538594627
- Maria Matos, MDChild & Adolescent Psychiatry Physician1730109927
- Taya MatoyMental Health Counselor1801143557
- Mollie MatsonStudent in an Organized Health Care Education/Training Program1225545098
- Gordon Matsuda, MDUrology Physician1679551204
- Ann Mattson, MDGynecology Physician1912085952
- Erika Mattson, PA-CPhysician Assistant1386482719
- Lynette Mauge Marshall, RNRegistered Nurse1558469031
- Kelsey MaxfieldCounselor1881523843
- Justin Maxhimer, M.D.Plastic Surgery Physician1720138639
- Julia Maximon, MDPsychiatry Physician1326194937
- Jules MaxwellSpeech-Language Pathologist1568938959
- Darrick May, MDPsychiatry Physician1841424603
- Travis May, LPCCCounselor1639030661
- Lindsey MayerOrthopedic Physical Therapist1104432285
- Sara Mayer, MSW/LCSWClinical Social Worker1760572572
- Anna MaynardClinical Social Worker1104194067
- Melissa Mayne, M.A.Mental Health Counselor1558784355
The largest Colorado cities
- Denver25,068
- Colorado Springs19,771
- Aurora17,400
- Fort Collins6,928
- Lakewood4,944
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.