Mark Osterman, MD
NPI 1669526851 · Gastroenterology Physician · Philadelphia, PA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Osterman, MD is a Gastroenterology Physician provider in Philadelphia, PA (NPI 1669526851).
Provider details
- NPI number
- 1669526851
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD422520 (PA)
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
19 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
- 2007-01-23
- Last updated
- 2016-03-14
Frequently asked questions
- What is Mark Osterman's NPI number?
- Mark Osterman's National Provider Identifier (NPI) is 1669526851, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Osterman's specialty?
- Mark Osterman is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Osterman located?
- Mark Osterman's practice location on file with NPPES is 51 N 39th St, Philadelphia, PA 19104-2640.
- What is Mark Osterman's phone number?
- The practice phone number listed in the NPPES registry for Mark Osterman is (215) 662-8900.
- Does Mark Osterman accept Medicare?
- Mark Osterman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Osterman's NPI active?
- Yes — Mark Osterman's NPI (1669526851) is active in the NPPES registry as of the last update on 2016-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.