Cornerstone Developmental Psychology
NPI 1336673318 · Psychologist · Hauppauge, NY
Cornerstone Developmental Psychology is a Psychologist organization in Hauppauge, NY (NPI 1336673318).
Provider details
- NPI number
- 1336673318
- Entity type
- Organization
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Mark Closson, Psychologist(631) 925-1003
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Social Worker104100000X
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
9 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
- 2017-04-17
- Last updated
- 2017-04-17
Frequently asked questions
- What is Cornerstone Developmental Psychology's NPI number?
- Cornerstone Developmental Psychology's National Provider Identifier (NPI) is 1336673318, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Cornerstone Developmental Psychology?
- Cornerstone Developmental Psychology is classified in the NPPES registry as Psychologist (Behavioral Health & Social Service Providers).
- Where is Cornerstone Developmental Psychology located?
- Cornerstone Developmental Psychology's practice location on file with NPPES is 750 Vets Hwy, Hauppauge, NY 11788-2943.
- What is Cornerstone Developmental Psychology's phone number?
- The practice phone number listed in the NPPES registry for Cornerstone Developmental Psychology is (631) 925-1003.
- Who is the authorized official for Cornerstone Developmental Psychology?
- The authorized official listed on Cornerstone Developmental Psychology's NPPES record is Mark Closson, Psychologist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Cornerstone Developmental Psychology's NPI active?
- Yes — Cornerstone Developmental Psychology's NPI (1336673318) is active in the NPPES registry as of the last update on 2017-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.