Gregory Mark Closkey, M.D.
Nephrology Physician · Bryn Mawr, PA
Gregory Mark Closkey, M.D. is a nephrology physician with a practice address in Bryn Mawr, Pennsylvania, and NPI 1942223573, issued on Jul 25, 2006. Check the license (Pennsylvania MD038267L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Gregory Mark Closkey
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- MD038267L PA
Self-reported in NPPES; status is on the state search - Practice location
- 830 Old Lancaster RD, Bryn Mawr, PA 19010
- Phone
- (610) 525-8110
- Enumerated
- Jul 25, 2006
- Record last updated
- Sep 4, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 0012986000002 PA
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 651 in Pennsylvania → Look up another NPI →
Also registered at 830 Old Lancaster RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory Mark Closkey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD038267LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average nephrology physician in 2024
22 Medicare Part D claims, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Gregory Mark Closkey among 651 nephrology physician records in Pennsylvania
Gregory Mark Closkey, M.D. is one of 651 nephrology physician records with a practice address in Pennsylvania. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2020 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Pennsylvania
There are 651 nephrology physician records in Pennsylvania.
All 651 in Pennsylvania → Every provider in Bryn Mawr → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Kristi Dodbiba, DOBryn Mawr, PA 190101902362437
- Sophia Moldavsky, M.D.Bryn Mawr, PA 190101043234438
- Yelena Mushiyakh, MDBryn Mawr, PA 190101215268818
- Anthony Zappacosta, M.D.Bryn Mawr, PA 190101801800479
- Sat Arora, M.D.Upland, PA 190131104865906
- Alan Barman, D.O.Upland, PA 190131992743793
- Arinze Ikeme, M.DChester, PA 190131740444710
- Glenn Ladinsky, M.D., PH.D.Upland, PA 190131467409607
Common questions
What is Gregory Mark Closkey, M.D.'s NPI number?
Gregory Mark Closkey, M.D.'s National Provider Identifier (NPI) is 1942223573, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Mark Closkey, M.D. located?
The NPPES record lists a practice address at 830 Old Lancaster RD, Bryn Mawr, PA, 19010. Phone: (610) 525-8110. Providers update this record themselves, so call before visiting.
How can I verify Gregory Mark Closkey, M.D.'s license?
NPPES lists Pennsylvania license number MD038267L, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Mark Closkey, M.D. prescribe under Medicare Part D?
In 2024, Gregory Mark Closkey, M.D. had 22 Medicare Part D claims; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.