Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Mark Closkey, M.D.

Nephrology Physician in Bryn Mawr, PA · enumerated 2006.

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

National Provider Identifier

1942223573

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Mark Closkey

Credential M.D.

Sex Male

Practice address 830 Old Lancaster Rd, Suite 206, Bryn Mawr, PA, 19010

Phone (610) 525-8110

Enumeration date Jul 25, 2006

Last updated in NPPES Sep 4, 2020

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License MD038267L (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
098735	Other	PA	BLUE SHIELD
0012981000002	Other	PA	PROMISE ID #
0012986000002	Medicaid	PA	-
390002631	Other	PA	TRVP #

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

Where does Gregory Closkey practice?

The practice location on file with NPPES is in Bryn Mawr, PA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Gregory Closkey?

The National Provider Identifier (NPI) for Gregory Closkey is 1942223573, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-04.