2026 data CMS NPPES NUCC Taxonomy

Doctors in Grass Valley, CA

Active healthcare providers in Grass Valley sourced from the CMS NPPES weekly file, no proprietary ratings, no editorial scores. NPI counts, specialty distribution, and primary practice addresses refreshed each release.

1,503
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Mental Health Counselor
Top specialty
191 providers
California
State
CA

1,503 healthcare providers across 20 specialties

Grass Valley, California appears in the CMS National Plan and Provider Enumeration System with 1,503 registered healthcare providers spanning 20 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 2023 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 (191 clinicians, followed by Addiction (Substance Use Disorder) Counselor with 146 and Counselor with 128). 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 3.9 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.

Within California, Grass Valley ranks #139 of 805 cities tracked by provider count, accounting for 0.2% of the state's registered providers. 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, searching by specialty narrows the 690-taxonomy roster to clinicians with the relevant training, and each provider page links to NPI, state licensing boards, and the NPPES registry for credential verification. 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, so listing details may be out of date; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients. Nothing on this page substitutes for consulting a licensed clinician about your personal health decisions.

1,503
Providers
20
Specialties
#139
of 805 CA cities
0.2%
of CA providers
3.9
Per 100K (state)

Which specialties are most common in Grass Valley

Mental Health Counselor 191
Addiction (Substance Use Disorder) Counselor 146
Counselor 128
Marriage & Family Therapist 114
Physical Therapist 60
Community Health Worker 50
Pharmacist 39
Family Medicine Physician 37
Case Manager/Care Coordinator 32
Registered Nurse 32
Adult Companion 31
Clinical Social Worker 31
Licensed Vocational Nurse 29
Student in an Organized Health Care Education/Training Program 25
Chiropractor 25
Internal Medicine Physician 23
General Practice Dentistry 23
Dentist 21
Family Nurse Practitioner 19
Physician Assistant 19

Healthcare Providers (Page 17)

Name
Jodi Lister, AMFT
Marriage & Family Therapist
Dante Littles
Counselor
Ian Livingston, APCC
Mental Health Counselor
David Lloyd, M.D.
Anesthesiology Physician
Jenny Lo
Pharmacist
Kirsten Loar
Clinical Social Worker
Thomas Long, M.D.
Emergency Medicine Physician
Mariah Longthorne
Counselor
Doreen Lopes, SUDD I
Addiction (Substance Use Disorder) Counselor
Reina Lopez
Social Worker
Shelby Lopp
Mental Health Counselor
Nicholas Lotze, RPT
Physical Therapist
Audrey Lough
Adult Companion
Susan Love, MFT
Marriage & Family Therapist
Mary Lowe
Marriage & Family Therapist
Robert Lowe, M.D.
Infectious Disease Physician
Adriana Lozano
Addiction (Substance Use Disorder) Counselor
Margaret Luce, LMFT
Marriage & Family Therapist
Paulette Lucier, PH.D., LMFT
Marriage & Family Therapist
Thomas Luisetti, MD
Anesthesiology Physician
Megan Lukkonen, LEP, BCBA
Behavior Analyst
Nicole Lundburg
Speech-Language Pathologist
Peter Luong, DDS
General Practice Dentistry
Jessica Lusignan, FNP-BC
Family Nurse Practitioner
Chelsea Lynch, PT
Physical Therapist
Leandra Lyon, DO
Student in an Organized Health Care Education/Training Program
James Mabry, PA-C
Physician Assistant
Heather Macadam
Mental Health Counselor
Joseph Macchiavelli, L.AC.
Acupuncturist
Erin Macdonald, M.D.
Obstetrics & Gynecology Physician
Jennifer Macdonell
Mental Health Counselor
Julie Maciolek, R.D.H.
Dental Hygienist
Elizabeth Macleod
Mental Health Counselor
Heather Madison
Case Manager/Care Coordinator
Allison Maffei, DPT
Physical Therapist
Jonathan Mah, RADT
Addiction (Substance Use Disorder) Counselor
Jessica Mairs, LM, CPM
Midwife
Yelena Makovey, NP, MSN
Physician Assistant
Nelson Maldonado, M.D.
Surgery Physician
John Mallery, MD
Cardiovascular Disease Physician
Chase Malloy
Physical Therapist
Sarah Mancebo
Addiction (Substance Use Disorder) Counselor
Aurora Manriquez
Counselor
Elizabeth Mantle, MFT, LPCC
Marriage & Family Therapist
Efstratia Mantzouranis
Student in an Organized Health Care Education/Training Program
Seema Maple, M.D.
Family Medicine Physician
Thais Marek, FNP
Nurse Practitioner
Kebby Margaretich, D.C.
Chiropractor
Lily Marie
Case Manager/Care Coordinator
Tanya Markis-Meyer, OD
Optometrist

Nearby Cities in California

Other California cities with provider coverage in the CMS NPPES registry.

Compare specialties side-by-side →

Frequently Asked Questions

How many doctors are in Grass Valley, CA?
There are 1,503 registered healthcare providers in Grass Valley, CA, covering 20 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, Counselor, Marriage & Family Therapist, Physical Therapist. Mental Health Counselor has the most providers with 191.

Provider data from CMS NPPES (download.cms.gov/nppes); specialty classification from NUCC Health Care Provider Taxonomy. PlainDoctor does not rate or rank providers. Methodology · About

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from CMS National Plan and Provider Enumeration System (NPPES). Consult a qualified professional before making decisions based on this data.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-20.