Diane Mercer, CASAC-T
NPI 1598985301 · Addiction (Substance Use Disorder) Counselor · Wyandanch, NY
Diane Mercer, CASAC-T is a Addiction (Substance Use Disorder) Counselor provider in Wyandanch, NY (NPI 1598985301).
Provider details
- NPI number
- 1598985301
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- CASAC-T
- Sex
- Female
- Sole proprietor
- No
- License
- 18272 (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
19 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
- 2007-04-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Diane Mercer's NPI number?
- Diane Mercer's National Provider Identifier (NPI) is 1598985301, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Mercer's specialty?
- Diane Mercer is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Diane Mercer located?
- Diane Mercer's practice location on file with NPPES is 240 Long Island Ave # a, Wyandanch, NY 11798-3123.
- What is Diane Mercer's phone number?
- The practice phone number listed in the NPPES registry for Diane Mercer is (631) 920-8250.
- Is Diane Mercer's NPI active?
- Yes — Diane Mercer's NPI (1598985301) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.