Doctors and health care providers in Grass Valley, CA
1,540 individual NPPES records list a practice address in Grass Valley, 142nd of 812 California cities. The largest group is mental health counselor: 151, 10% of the city's records, against 3% across California. Page 18 of 31.
The 8 largest groups in Grass Valley
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Grass Valley in California
- Rank in California142nd of 812 cities by records
- Share of the state0.2% of California's records
- Specialties present25 or more taxonomy codes
- Top three groups28.2% of all records
Compared with California as a whole, Grass Valley has 15.1× the state's share of adult companion records and 0.31× its share of student in an organized health care education/training program records.
Providers in Grass Valley, alphabetically
- Jennifer MacdonellMarriage & Family Therapist1013551027
- Julie Maciolek, R.D.H.Dental Hygienist1346580206
- Elizabeth MacleodMental Health Counselor1811530777
- Heather MadisonCase Manager/Care Coordinator1912253733
- Allison Maffei, DPTPhysical Therapist1821517178
- Andrew Magan, CRNACertified Registered Nurse Anesthetist1780734004
- Jonathan Mah, RADTAddiction (Substance Use Disorder) Counselor1124905484
- Jessica Mairs, LM, CPMMidwife1053602052
- Yelena Makovey, NP, MSNNurse Practitioner1275753899
- Nelson Maldonado, M.D.Surgery Physician1508921305
- John Mallery, MDCardiovascular Disease Physician1780664201
- Chase MalloyPhysical Therapist1639869381
- Sarah ManceboAddiction (Substance Use Disorder) Counselor1396383055
- Aurora ManriquezCounselor1639763048
- Elizabeth Mantle, MFT, LPCCMarriage & Family Therapist1679805469
- Efstratia MantzouranisStudent in an Organized Health Care Education/Training Program1699526053
- Seema Maple, M.D.Family Medicine Physician1407952294
- Thais Marek, FNPFamily Nurse Practitioner1972087658
- Kebby Margaretich, D.C.Chiropractor1407949118
- Lily MarieCase Manager/Care Coordinator1699980334
- Tanya Markis-Meyer, ODOptometrist1164457891
- Parnian Maroufi, PT, DPTPhysical Therapist1285599084
- Cienna MartinDay Training/Habilitation Specialist1427605617
- Courtney MartinMental Health Counselor1124540265
- De Anna MartinDay Training/Habilitation Specialist1700716131
- Kathlee Martin, APNFamily Nurse Practitioner1497944789
- Lizbeth MartinPsychologist1831792118
- Robert Martin, RPHPharmacist1972908556
- Teresa Martinez, LCSWClinical Social Worker1164552089
- Mirian Martinez RamirezLicensed Psychiatric Technician1871226555
- Kenneth Marvin, MDCardiovascular Disease Physician1417035221
- Peter MarvinMarriage & Family Therapist1235567678
- Andrea MascorroPsychiatric/Mental Health Registered Nurse1104217173
- Tatiana MataCounselor1134705635
- Kortney Mathiesen, AUDAudiologist-Hearing Aid Fitter1295501286
- Barbara MatiskaSpeech-Language Pathologist1285366286
- Jonathon MatousekAddiction (Substance Use Disorder) Counselor1508549494
- Lisa MatsonPhysician Assistant1578436366
- Margaret Matthews, P.T.Physical Therapist1699096248
- Jamie Maxwell, LMFTMarriage & Family Therapist1073877684
- John Mayfield, DOCTOR OF CHIROPRACTChiropractor1255366381
- Andrew Mazer, PHD, MFTMarriage & Family Therapist1013074137
- Shawn McAlinn, REGISTERED NURSEAddiction (Substance Use Disorder) Registered Nurse1194194894
- Shannon McBain, FNPNurse Practitioner1427177054
- Pamela McBrideAddiction (Substance Use Disorder) Counselor1407147192
- Erin McCarthy, NTP, MWRPNutritionist1528893567
- Gwena McCarthyCounselor1891454211
- Lyne McCarthy, RADTAddiction (Substance Use Disorder) Counselor1982208476
- Jason McCay-MoranCounselor1366173403
- Angela McClainCounselor1205360872
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
How to read this directory
Grass Valley, California appears in the CMS National Plan and Provider Enumeration System with 1,540 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 Grass Valley - 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 Grass Valley 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 Grass Valley is weighted toward Mental Health Counselor (151 clinicians, followed by Addiction (Substance Use Disorder) Counselor with 148 and Marriage & Family Therapist with 136). 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 California's population, Grass Valley reports roughly 4 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 California's most common specialties, Behavior Technician is the most prominent one with no provider currently listing a Grass Valley practice address, a coverage gap Grass Valley patients typically fill by traveling to a larger nearby hub.
For Grass Valley 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 Grass Valley, CA?
There are 1,540 registered healthcare providers in Grass Valley, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Grass Valley?
The most common specialties in Grass Valley are Mental Health Counselor, Addiction (Substance Use Disorder) Counselor, Marriage & Family Therapist, Counselor, Physical Therapist. Mental Health Counselor has the most providers with 151.
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.