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JONATHAN RYAN MAH RADT
NPI 1124905484
Counselor - Addiction (Substance Use Disorder) in Grass Valley, CA

Active since August 19, 2025
159 BRENTWOOD DR, GRASS VALLEY, CA 95945(530) 273-9541 Get Directions Write a Review

NPPES record last updated: August 19, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Jonathan Ryan Mah Radt NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JONATHAN RYAN MAH RADT (NPI 1124905484) is an individual addiction (substance use disorder) provider in Grass Valley, California, licensed in California (R1623720725) and active in the NPI registry since August 2025.

NPPES Registry Identity

NPI1124905484
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameJONATHAN RYAN MAHCredential: RADT
Location Address159 BRENTWOOD DRGrass Valley, CA 95945-5703
Mailing Address406 Sunrise Ave Ste 105Roseville, CA 95661-4145
Phone(530) 273-9541
Sole ProprietorYes
Enumeration DateAugust 19, 2025
NPPES CertifiedAugust 19, 2025
✔ NPI 1124905484 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
License✔ Licensed in CA · R1623720725
159 BRENTWOOD DR, Grass Valley, CA 95945
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KENNETH WISEMAN
Counselor (Addiction (Substance Use Disorder))
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 460-4083
SAVANNAH M WALKER
Counselor (Addiction (Substance Use Disorder))
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 271-1140
SAMANTHA E SMITH RADT
Counselor (Addiction (Substance Use Disorder))
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 271-1140
SOFIA M DEGRUCCIO
Technician
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 273-1140
ANDREA FIGUEROA RADT
Counselor (Addiction (Substance Use Disorder))
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 273-9541
PHILLIP KRULISKY RADT
Counselor (Addiction (Substance Use Disorder))
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 878-5166
AMY JOHNSON
Counselor
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 271-1140
JESSICA ESCOBEDO
Counselor (Addiction (Substance Use Disorder))
159 BRENTWOOD DR
GRASS VALLEY, CA 95945
Nevada County (530) 271-1140

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jonathan Mah's NPI number?

The NPI number for Jonathan Mah is 1124905484. It was assigned to this individual provider in the NPPES registry on August 19, 2025.

Where is Jonathan Mah located?

Jonathan Mah practices at 159 Brentwood Dr, Grass Valley, CA 95945. The listed phone number is (530) 273-9541.

What is Jonathan Mah's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for Jonathan Mah was last updated on August 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.