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

MS. Theresa Y. Williams, CASAC

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1689820995

MS. Theresa Y. Williams, CASAC is an Addiction (Substance Use Disorder) Counselor in New York, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2008

Practice location Address checks out

500 8th Ave 3rd Fl
New York, NY 10018-6504 Not confirmed with CMS for 18 years — call before visiting
Phone: (212) 904-1500
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 12644 (NY)

Record details

NPI number1689820995
Entity typeIndividual (Type 1)
GenderFemale
Credentials CASAC
Sole proprietorYes
NPI enumeratedAugust 18, 2008
Last updated in NPPESAugust 18, 2008

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