Theresa Williams, C.A.S.A.C.
NPI 1689820995 · Addiction (Substance Use Disorder) Counselor · New York, NY
Theresa Williams, C.A.S.A.C. is a Addiction (Substance Use Disorder) Counselor provider in New York, NY (NPI 1689820995).
Provider details
- NPI number
- 1689820995
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- C.A.S.A.C.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 12644 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-18
- Last updated
- 2008-08-18
Frequently asked questions
- What is Theresa Williams's NPI number?
- Theresa Williams's National Provider Identifier (NPI) is 1689820995, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Williams's specialty?
- Theresa Williams is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Theresa Williams located?
- Theresa Williams's practice location on file with NPPES is 500 8th Ave, New York, NY 10018-6504.
- What is Theresa Williams's phone number?
- The practice phone number listed in the NPPES registry for Theresa Williams is (212) 904-1500.
- Is Theresa Williams's NPI active?
- Yes — Theresa Williams's NPI (1689820995) is active in the NPPES registry as of the last update on 2008-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.