Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Jonathan Ryan Mah, RADT

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1124905484

Jonathan Ryan Mah, RADT is an Addiction (Substance Use Disorder) Counselor in Grass Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2025

Practice location Address checks out

159 Brentwood Dr
Grass Valley, CA 95945-5703
Phone: (530) 273-9541
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence R1623720725 (CA)

Record details

NPI number1124905484
Entity typeIndividual (Type 1)
GenderMale
Credentials RADT
Sole proprietorYes
NPI enumeratedAugust 19, 2025
Last updated in NPPESAugust 19, 2025
Certification dateAugust 19, 2025
Mailing address406 Sunrise Ave Ste 105, Roseville, CA 95661-4145

Other providers in Grass Valley