Jonathon Leiser, MD
Emergency Medicine Physician · Philadelphia, PA
Jonathon Leiser, MD is an emergency medicine physician with a practice address in Philadelphia, Pennsylvania, and NPI 1396705117, issued on Mar 24, 2006. Check the license (Pennsylvania MD054358L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Jonathon Leiser
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD054358L PA
Self-reported in NPPES; status is on the state search - Practice location
- 5501 Old York RD, Philadelphia, PA 19141
- Phone
- (215) 456-6679
- Enumerated
- Mar 24, 2006
- Record last updated
- Mar 17, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (215) 456-8502
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 5501 Old York RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonathon Leiser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD054358LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average emergency medicine physician in 2024
12 Medicare Part D claims, against an average of 226 among the 54,106 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.
Jonathon Leiser among 3,911 emergency medicine physician records in Pennsylvania
Jonathon Leiser, MD is one of 3,911 emergency medicine physician records with a practice address in Pennsylvania. 82% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 69% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2014 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,006 emergency medicine physician records list a practice address in Philadelphia
They are 1,006 of the 42,849 NPPES records with a practice address in Philadelphia, and 3,911 emergency medicine physician records in Pennsylvania.
All 3,911 in Pennsylvania → Every provider in Philadelphia → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Earl Bryant, DOPhiladelphia, PA 191411356301964
- Merle Carter, MDPhiladelphia, PA 191411073572319
- Charles Fasano, DOPhiladelphia, PA 191411518927847
- Christine Giesa, DOPhiladelphia, PA 191411790754778
- John Kelly, DOPhiladelphia, PA 191411467421644
- Scott Korvek, MD, FACEPPhiladelphia, PA 191411134111412
- Douglas McGee, DOPhiladelphia, PA 191411891764973
- Gerald O Malley, DOPhiladelphia, PA 191411356300057
Common questions
What is Jonathon Leiser, MD's NPI number?
Jonathon Leiser, MD's National Provider Identifier (NPI) is 1396705117, issued on Mar 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathon Leiser, MD located?
The NPPES record lists a practice address at 5501 Old York RD, Philadelphia, PA, 19141. Phone: (215) 456-6679. Providers update this record themselves, so call before visiting.
How can I verify Jonathon Leiser, MD's license?
NPPES lists Pennsylvania license number MD054358L, 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 Jonathon Leiser, MD prescribe under Medicare Part D?
In 2024, Jonathon Leiser, MD had 12 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. 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.