Mark Closson, PH.D.
NPI 1841577004 · Clinical Psychologist · Garden City, NY
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Closson, PH.D. is a Clinical Psychologist provider in Garden City, NY (NPI 1841577004).
Provider details
- NPI number
- 1841577004
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 019356 (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
14 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
- 2011-11-15
- Last updated
- 2011-11-15
Frequently asked questions
- What is Mark Closson's NPI number?
- Mark Closson's National Provider Identifier (NPI) is 1841577004, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Closson's specialty?
- Mark Closson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Closson located?
- Mark Closson's practice location on file with NPPES is 601 Franklin Ave Ste 200, Garden City, NY 11530-5760.
- What is Mark Closson's phone number?
- The practice phone number listed in the NPPES registry for Mark Closson is (516) 669-0135.
- Does Mark Closson accept Medicare?
- Mark Closson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Closson's NPI active?
- Yes — Mark Closson's NPI (1841577004) is active in the NPPES registry as of the last update on 2011-11-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.