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MR. JOHN CHARLES DUFF III
NPI 1962732719
Counselor - Addiction (Substance Use Disorder) in Nevada City, CA

Active since December 29, 2009
727 ZION ST, NEVADA CITY, CA 95959(530) 265-2914 Get Directions Write a Review

NPPES record last updated: December 29, 2009. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mr. John Charles Duff Iii NPPES

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

MR. JOHN CHARLES DUFF III (NPI 1962732719) is an individual addiction (substance use disorder) provider in Nevada City, California, licensed in California (9852) and active in the NPI registry since December 2009.

NPPES Registry Identity

NPI1962732719
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameMR. JOHN CHARLES DUFF III
Location Address727 ZION STNevada City, CA 95959-2920
Mailing Address727 Zion StNevada City, CA 95959-2920 · (530) 265-2914
Phone(530) 265-2914
Sole ProprietorNo
Enumeration DateDecember 29, 2009
✔ NPI 1962732719 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 · 9852
727 ZION ST, Nevada City, CA 95959
Open in Google Maps ↗

Other Identifiers 1

Other290007APCA · Other

Other Providers at the Same Location NPPES 9

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

ROBERT M. BARKER CASI
Counselor (Addiction (Substance Use Disorder))
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 265-2914
ALEXANDRA M. WRIGHT M.F.T.
Marriage & Family Therapist
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 265-2914
MRS. JEANNE MARIE BORNSTEIN
Counselor (Addiction (Substance Use Disorder))
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 265-2914
SUSAN LEE COUTURE
Counselor (Addiction (Substance Use Disorder))
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 265-2914
COMMON GOALS
Counselor (Addiction (Substance Use Disorder))
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 265-2914
TERRI M NADZAM-RUGGIERO
Counselor (Addiction (Substance Use Disorder))
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 265-2914
STEVE NAVISKY LMFT
Marriage & Family Therapist
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 470-2338
MR. JAN DANIEL FRANKENBERGER RRW
Counselor (Addiction (Substance Use Disorder))
727 ZION ST
NEVADA CITY, CA 95959
Nevada County (530) 265-2941

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 John Duff's NPI number?

The NPI number for John Duff is 1962732719. It was assigned to this individual provider in the NPPES registry on December 29, 2009.

Where is John Duff located?

John Duff practices at 727 Zion St, Nevada City, CA 95959. The listed phone number is (530) 265-2914.

What is John Duff'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 John Duff was last updated on December 29, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years 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.