Gary Portnay, M.D
NPI 1346289345 · Internal Medicine Physician · Andover, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Portnay, M.D is a Internal Medicine Physician provider in Andover, MA (NPI 1346289345).
Provider details
- NPI number
- 1346289345
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 32439 (MA)
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
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
- 2006-06-05
- Last updated
- 2022-06-21
- Certified
- 2022-06-21
Frequently asked questions
- What is Gary Portnay's NPI number?
- Gary Portnay's National Provider Identifier (NPI) is 1346289345, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Portnay's specialty?
- Gary Portnay is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gary Portnay located?
- Gary Portnay's practice location on file with NPPES is 13 Bateson Drive, Andover, MA 01810-3401.
- What is Gary Portnay's phone number?
- The practice phone number listed in the NPPES registry for Gary Portnay is (781) 879-2061.
- Does Gary Portnay accept Medicare?
- Gary Portnay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Portnay's NPI active?
- Yes — Gary Portnay's NPI (1346289345) is active in the NPPES registry as of the last update on 2022-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.