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

Marlon Flash Welch, RAS

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1336359413

Marlon Flash Welch, RAS is an Addiction (Substance Use Disorder) Counselor in San Francisco, California. Registered with an NPI since 2007.

In the registry since
2007

Practice location Address checks out

433 Turk St
San Francisco, CA 94102-3329
Phone: (415) 928-7802
Fax: (415) 928-3710
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

Record details

NPI number1336359413
Entity typeIndividual (Type 1)
GenderMale
Credentials RAS
Sole proprietorNo
NPI enumeratedMay 23, 2007
Last updated in NPPESSeptember 12, 2007

Other providers in San Francisco