Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John G Trzesniowski, D.O.

Family Medicine Physician in Philadelphia, PA · enumerated 2006 · practices at Dr. John Trzesniowski LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1144264664

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Registry record

Entity type Individual (Type 1)

Name Dr. John G Trzesniowski

Credential D.O.

Sex Male

Practice address 2716 E Allegheny Ave, Philadelphia, PA, 19134

Phone (215) 426-3610

Fax (215) 426-6835

Enumeration date Jun 15, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License OS003175L (PA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
0058140001	Other	PA	KEYSTONE HEALTH PLAN
1002402	Other	PA	KEYSTONE MERCY
11019	Other	PA	ELDER HEALTH
4102250	Other	PA	AETNA
0006115620002	Medicaid	PA	-
173956	Other	PA	PENNSYLVANIA BLUE SHIELD
28293	Other	PA	HEALTH PARTNERS

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify John Trzesniowski's NPI record?

Cross-check NPI 1144264664 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1144264664 active?

Yes, as of the latest NPPES snapshot, NPI 1144264664 is active (record last updated 2007-07-08).

Other providers at this practice address

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Matthew Trzesniowski General Practice Physician · Philadelphia, PA NPI 1487933503 Dr. John Trzesniowski LLC General Practice Physician · Philadelphia, PA NPI 1649692500 Erica Zabala Family Nurse Practitioner · Philadelphia, PA NPI 1922988112

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.