1. Home
  2. Directory
  3. Pennsylvania
  4. Philadelphia
  5. Internal Medicine
  6. NPI Profile

DR. GREGORY MASLAK M.D.
NPI 1720439235
Internal Medicine in Philadelphia, PA

Active since June 27, 2016
245 N 15TH ST,, DREXEL UNIVERSITY COLLEGE OF MEDICINE 6TH FLOOR, PHILADELPHIA, PA 19102(215) 762-7000 Get Directions Write a Review

NPPES record last updated: March 8, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 8, 2021, Jun 27, 2016 (2 updates tracked since 2016).

About Dr. Gregory Maslak M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GREGORY MASLAK M.D. (NPI 1720439235) is an individual internal medicine provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MT211838) and active in the NPI registry since June 2016.

NPPES Registry Identity

NPI1720439235
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. GREGORY MASLAKCredential: M.D.
Location Address245 N 15TH ST,, DREXEL UNIVERSITY COLLEGE OF MEDICINE 6TH FLOORPhiladelphia, PA 19102-3129
Mailing Address245 N 15th St., Drexel University College Of Medicine 6th FloorPhiladelphia, PA 19102-3129 · (215) 762-7000
Phone(215) 762-7000
Sole ProprietorNo
Enumeration DateJune 27, 2016
Last NPPES UpdateMarch 8, 20212 updates tracked since enumeration
NPPES CertifiedMarch 8, 2021
✔ NPI 1720439235 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in PA · MT211838✔ Licensed in CT · 064131
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License 064131 (CT)
245 N 15TH ST,, Philadelphia, PA 19102
Open in Google Maps ↗

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Maslak's NPI number?

The NPI number for Gregory Maslak is 1720439235. It was assigned to this individual provider in the NPPES registry on June 27, 2016.

Where is Gregory Maslak located?

Gregory Maslak practices at 245 N 15th St, Drexel University College Of Medicine 6th Floor, Philadelphia, PA 19102. The listed phone number is (215) 762-7000.

What is Gregory Maslak's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Gregory Maslak was last updated on March 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.