Michael John Mesaros, M.D.
Internal Medicine Physician · Harrisburg, PA
Michael John Mesaros, M.D. is an internal medicine physician with a practice address in Harrisburg, Pennsylvania, and NPI 1952721128, issued on Apr 25, 2014. Check the license (Pennsylvania MD022261E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Michael John Mesaros
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD022261E PA
Self-reported in NPPES; status is on the state search - Practice location
- 5071 Bass Lake Dr, Harrisburg, PA 17111
- Phone
- (717) 645-0974
- Enumerated
- Apr 25, 2014
- Record last updated
- Apr 25, 2014 (not updated in 12 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 Michael John Mesaros in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD022261ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
20 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.
Michael John Mesaros among 7,300 internal medicine physician records in Pennsylvania
Michael John Mesaros, M.D. 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 2014, is newer than 60% of them.
- NPI issued2014 · 60% of these records are older, 38% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2014 · 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).
184 internal medicine physician records list a practice address in Harrisburg
They are 184 of the 3,963 NPPES records with a practice address in Harrisburg, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Harrisburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nichole Barton, DOHarrisburg, PA 171111225356751
- Carrie Delone, MDHarrisburg, PA 171111487641221
- Nirmal Joshi, MDHarrisburg, PA 171111306875968
- Olatokunbo Adeniyi, M.D.Harrisburg, PA 171121174621809
- Tania Anderson, MDHarrisburg, PA 171121619948544
- William Bambach, D.O.Harrisburg, PA 171101548567076
- David Delrosario, M.D.Harrisburg, PA 171121407812159
- Evangeline Emesue, M.DHarrisburg, PA 171101033553540
Common questions
What is Michael John Mesaros, M.D.'s NPI number?
Michael John Mesaros, M.D.'s National Provider Identifier (NPI) is 1952721128, issued on Apr 25, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Michael John Mesaros, M.D. located?
The NPPES record lists a practice address at 5071 Bass Lake Dr, Harrisburg, PA, 17111. Phone: (717) 645-0974. Providers update this record themselves, so call before visiting.
How can I verify Michael John Mesaros, M.D.'s license?
NPPES lists Pennsylvania license number MD022261E, 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 Michael John Mesaros, M.D. prescribe under Medicare Part D?
In 2024, Michael John Mesaros, M.D. had 20 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.