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

Mr. John Charles Duff III

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1962732719

Mr. John Charles Duff III is an Addiction (Substance Use Disorder) Counselor in Nevada City, California. Licensed in California. Registered with an NPI since 2009.

Licensed in
CA
In the registry since
2009

Practice location Address checks out

727 Zion St
Nevada City, CA 95959-2920
Phone: (530) 265-2914
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 9852 (CA)

Record details

NPI number1962732719
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedDecember 29, 2009
Last updated in NPPESDecember 29, 2009

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