Gregory Diehl, MD
NPI 1447249214 · Plastic Surgery Physician · Port Jefferson Station, NY
Enrolled with Medicare as Practitioner - Plastic and Reconstructive Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Diehl, MD is a Plastic Surgery Physician provider in Port Jefferson Station, NY (NPI 1447249214).
Provider details
- NPI number
- 1447249214
- Entity type
- Individual
- Primary specialty
- Plastic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 1902162 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2005-10-14
- Last updated
- 2020-05-20
- Certified
- 2020-05-20
Frequently asked questions
- What is Gregory Diehl's NPI number?
- Gregory Diehl's National Provider Identifier (NPI) is 1447249214, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Diehl's specialty?
- Gregory Diehl is listed in the NPPES registry with a primary specialty of Plastic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Diehl located?
- Gregory Diehl's practice location on file with NPPES is 1500 Route 112 Bldg # 10, Port Jefferson Station, NY 11776.
- What is Gregory Diehl's phone number?
- The practice phone number listed in the NPPES registry for Gregory Diehl is (631) 476-7300.
- Does Gregory Diehl accept Medicare?
- Gregory Diehl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Diehl's NPI active?
- Yes — Gregory Diehl's NPI (1447249214) is active in the NPPES registry as of the last update on 2020-05-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.