Gregory Dillon, MD
NPI 1003941287 · Psychiatry Physician · New York, NY
Gregory Dillon, MD is a Psychiatry Physician provider in New York, NY (NPI 1003941287).
Provider details
- NPI number
- 1003941287
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 217184 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Clonazepam | 43 |
| Fluoxetine Hcl | 39 |
| Duloxetine Hcl | 27 |
| Trazodone Hcl | 23 |
| Bupropion Hclbrand: Bupropion Hcl Sr | 22 |
| Aripiprazole | 16 |
| Quetiapine Fumarate | 12 |
| Bupropion Hclbrand: Bupropion Xl | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-21
- Last updated
- 2026-04-07
- Certified
- 2026-04-07
Frequently asked questions
- What is Gregory Dillon's NPI number?
- Gregory Dillon's National Provider Identifier (NPI) is 1003941287, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Dillon's specialty?
- Gregory Dillon is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Dillon located?
- Gregory Dillon's practice location on file with NPPES is 1133 Broadway Ste 521, New York, NY 10010-8107.
- What is Gregory Dillon's phone number?
- The practice phone number listed in the NPPES registry for Gregory Dillon is (212) 352-8184.
- Is Gregory Dillon's NPI active?
- Yes — Gregory Dillon's NPI (1003941287) is active in the NPPES registry as of the last update on 2026-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.