Leroy T. Gerson, MD
Internal Medicine Physician · Bryn Mawr, PA
Leroy T. Gerson, MD is an internal medicine physician with a practice address in Bryn Mawr, Pennsylvania, and NPI 1285871780, issued on Jan 21, 2009. Check the license (Pennsylvania MD 007963E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Leroy T. Gerson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD 007963E PA
Self-reported in NPPES; status is on the state search - Practice location
- 611 Foxfields RD, Bryn Mawr, PA 19010
- Phone
- (610) 520-0770
- Enumerated
- Jan 21, 2009
- Record last updated
- Jan 21, 2009 (not updated in 17 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Verify Leroy T. Gerson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD 007963ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
14 Medicare Part D claims, against an average of 3,176 among the 108,855 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.
Leroy T. Gerson among 7,300 internal medicine physician records in Pennsylvania
Leroy T. Gerson, MD is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 47% of them.
- NPI issued2009 · 47% of these records are older, 50% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2009 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
49 internal medicine physician records list a practice address in Bryn Mawr
They are 49 of the 1,496 NPPES records with a practice address in Bryn Mawr, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Bryn Mawr → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bonnie Ashby, MDBryn Mawr, PA 190101659350130
- Nahed Botros, DOBryn Mawr, PA 190101770556615
- Richard Brower, M.D.Bryn Mawr, PA 190101558331769
- Matthew Cahill, MDBryn Mawr, PA 190101528031325
- Madeline Danny, D.OBryn Mawr, PA 190101659311892
- Shalini Harigovind, MDBryn Mawr, PA 190101790759306
- Sivasankara Kosaraju, MDBryn Mawr, PA 190101558335919
- Lawrence McKnight, MDBryn Mawr, PA 190101013981166
Common questions
What is Leroy T. Gerson, MD's NPI number?
Leroy T. Gerson, MD's National Provider Identifier (NPI) is 1285871780, issued on Jan 21, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Leroy T. Gerson, MD located?
The NPPES record lists a practice address at 611 Foxfields RD, Bryn Mawr, PA, 19010. Phone: (610) 520-0770. Providers update this record themselves, so call before visiting.
How can I verify Leroy T. Gerson, MD's license?
NPPES lists Pennsylvania license number MD 007963E, 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 Leroy T. Gerson, MD prescribe under Medicare Part D?
In 2024, Leroy T. Gerson, MD had 14 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.