Greenwich Avenue Psychiatry, PC
NPI 1033819453 · Child & Adolescent Psychiatry Physician · Old Greenwich, CT
Greenwich Avenue Psychiatry, PC is a Child & Adolescent Psychiatry Physician organization in Old Greenwich, CT (NPI 1033819453).
Provider details
- NPI number
- 1033819453
- Entity type
- Organization
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Marc Halperin, President(917) 540-0230
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Psychiatry Physician2084P0800X
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 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
- 2023-03-06
- Last updated
- 2025-06-04
- Certified
- 2025-06-04
Frequently asked questions
- What is Greenwich Avenue Psychiatry, PC's NPI number?
- Greenwich Avenue Psychiatry, PC's National Provider Identifier (NPI) is 1033819453, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Greenwich Avenue Psychiatry, PC?
- Greenwich Avenue Psychiatry, PC is classified in the NPPES registry as Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Greenwich Avenue Psychiatry, PC located?
- Greenwich Avenue Psychiatry, PC's practice location on file with NPPES is 3 W End Ave Ste 111, Old Greenwich, CT 06870-1640.
- What is Greenwich Avenue Psychiatry, PC's phone number?
- The practice phone number listed in the NPPES registry for Greenwich Avenue Psychiatry, PC is (917) 540-0230.
- Who is the authorized official for Greenwich Avenue Psychiatry, PC?
- The authorized official listed on Greenwich Avenue Psychiatry, PC's NPPES record is Marc Halperin, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Greenwich Avenue Psychiatry, PC's NPI active?
- Yes — Greenwich Avenue Psychiatry, PC's NPI (1033819453) is active in the NPPES registry as of the last update on 2025-06-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.