Thomas Gregg, MD PHD
NPI 1639339146 · Family Medicine Physician · Rochester, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Gregg, MD PHD is a Family Medicine Physician provider in Rochester, NY (NPI 1639339146).
Provider details
- NPI number
- 1639339146
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 255452 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 434 | 118 |
| Amlodipine Besylate | 337 | 88 |
| Gabapentin | 239 | 57 |
| Famotidine | 184 | 37 |
| Lisinopril | 153 | 39 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 146 | 37 |
| Hydrochlorothiazide | 145 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-10
- Last updated
- 2015-08-19
Frequently asked questions
- What is Thomas Gregg's NPI number?
- Thomas Gregg's National Provider Identifier (NPI) is 1639339146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Gregg's specialty?
- Thomas Gregg is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Gregg located?
- Thomas Gregg's practice location on file with NPPES is 480 Genesee Street, Rochester, NY 14611.
- What is Thomas Gregg's phone number?
- The practice phone number listed in the NPPES registry for Thomas Gregg is (585) 436-3040.
- Does Thomas Gregg accept Medicare?
- Thomas Gregg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Gregg's NPI active?
- Yes — Thomas Gregg's NPI (1639339146) is active in the NPPES registry as of the last update on 2015-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.