Gregory Maslak, M.D.
NPI 1720439235 · Internal Medicine Physician · Philadelphia, PA
Gregory Maslak, M.D. is a Internal Medicine Physician provider in Philadelphia, PA (NPI 1720439235).
Provider details
- NPI number
- 1720439235
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 064131 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
10 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
- 2016-06-27
- Last updated
- 2021-03-08
- Certified
- 2021-03-08
Frequently asked questions
- What is Gregory Maslak's NPI number?
- Gregory Maslak's National Provider Identifier (NPI) is 1720439235, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Maslak's specialty?
- Gregory Maslak is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Maslak located?
- Gregory Maslak's practice location on file with NPPES is 245 N 15th St,, Philadelphia, PA 19102-3129.
- What is Gregory Maslak's phone number?
- The practice phone number listed in the NPPES registry for Gregory Maslak is (215) 762-7000.
- Is Gregory Maslak's NPI active?
- Yes — Gregory Maslak's NPI (1720439235) is active in the NPPES registry as of the last update on 2021-03-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.