What is Mark Mahon's NPI number?

Mark Mahon's National Provider Identifier (NPI) is 1184276966, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Mahon's specialty?

Mark Mahon is listed in the NPPES registry with a primary specialty of Pediatric Gastroenterology Physician (Allopathic & Osteopathic Physicians).

Where is Mark Mahon located?

Mark Mahon's practice location on file with NPPES is 3401 Civic Center Blvd, Philadelphia, PA 19104.

What is Mark Mahon's phone number?

The practice phone number listed in the NPPES registry for Mark Mahon is (215) 590-3247.

Is Mark Mahon's NPI active?

Yes — Mark Mahon's NPI (1184276966) is active in the NPPES registry as of the last update on 2025-12-04.

IndividualActive

Mark Mahon, MD

NPI 1184276966 · Pediatric Gastroenterology Physician · Philadelphia, PA

Mark Mahon, MD is a Pediatric Gastroenterology Physician provider in Philadelphia, PA (NPI 1184276966).

Provider details

NPI number: 1184276966
Entity type: Individual
Primary specialty: Pediatric Gastroenterology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Pediatric Gastroenterology PhysicianPrimary2080P0206XLicense MT224821 (PA)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care
Pediatrics Physician208000000XLicense MD477537 (PA)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(64/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
6 yrs in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
2 documented practice locations

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

3401 Civic Center Blvd

Division of Pediatric Gastroenterology

Philadelphia, PA 19104

Phone: (215) 590-3247

Street-level locationGet directions

More PA providers

Mailing address

3401 Civic Center Blvd

Philadelphia, PA 19104

Additional practice locations (1)

1400 Pelham Pkwy S
Bronx, NY 10461-1138
Phone: (718) 918-6315

Enumerated: 2019-07-12
Last updated: 2025-12-04
Certified: 2025-12-04

Frequently asked questions

What is Mark Mahon's NPI number?: Mark Mahon's National Provider Identifier (NPI) is 1184276966, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mark Mahon's specialty?: Mark Mahon is listed in the NPPES registry with a primary specialty of Pediatric Gastroenterology Physician (Allopathic & Osteopathic Physicians).
Where is Mark Mahon located?: Mark Mahon's practice location on file with NPPES is 3401 Civic Center Blvd, Philadelphia, PA 19104.
What is Mark Mahon's phone number?: The practice phone number listed in the NPPES registry for Mark Mahon is (215) 590-3247.
Is Mark Mahon's NPI active?: Yes — Mark Mahon's NPI (1184276966) is active in the NPPES registry as of the last update on 2025-12-04.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.