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Nerissa Williams
NPI 1689027195 · Behavior Analyst · Deer Park, NY
Nerissa Williams is a Behavior Analyst provider in Deer Park, NY (NPI 1689027195).
Provider details
- NPI number
- 1689027195
- Entity type
- Individual
- Primary specialty
- Behavior AnalystBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(65/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
83% 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
99 Maida Ave
Deer Park, NY 11729-7009
Phone: (631) 645-0127
Street-level locationGet directions
Mailing address
99 Maida Ave
Deer Park, NY 11729-7009
Registry dates
- Enumerated
- 2016-07-20
- Last updated
- 2016-07-20
Frequently asked questions
- What is Nerissa Williams's NPI number?
- Nerissa Williams's National Provider Identifier (NPI) is 1689027195, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nerissa Williams's specialty?
- Nerissa Williams is listed in the NPPES registry with a primary specialty of Behavior Analyst (Behavioral Health & Social Service Providers).
- Where is Nerissa Williams located?
- Nerissa Williams's practice location on file with NPPES is 99 Maida Ave, Deer Park, NY 11729-7009.
- What is Nerissa Williams's phone number?
- The practice phone number listed in the NPPES registry for Nerissa Williams is (631) 645-0127.
- Is Nerissa Williams's NPI active?
- Yes — Nerissa Williams's NPI (1689027195) is active in the NPPES registry as of the last update on 2016-07-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.