John Thomas Flaherty, D.O.
Internal Medicine Physician · Monroeville, PA
John Thomas Flaherty, D.O. is an internal medicine physician with a practice address in Monroeville, Pennsylvania, and NPI 1861055501, issued on Apr 18, 2019. Check the license (Pennsylvania OS022234, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John Thomas Flaherty
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS022234 PA
Self-reported in NPPES; status is on the state search - Practice location
- 2775 Mosside Blvd, Monroeville, PA 15146
- Phone
- (412) 357-3000
- Enumerated
- Apr 18, 2019
- Record last updated
- Nov 29, 2023
- Medicare enrollment
- Enrolled (PECOS I20220624002453); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 2775 Mosside Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Thomas Flaherty in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS022234Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
376 Medicare Part D claims for 165 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass22 claims
- Oxycodone Hcl15 claims
- Atorvastatin Calcium14 claims
- Pantoprazole Sodium13 claims
- Prednisone13 claims
- Furosemide11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 77.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- University OF Pittsburgh PhysiciansPittsburgh, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Thomas Flaherty among 7,300 internal medicine physician records in Pennsylvania
John Thomas Flaherty, D.O. 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 2019, is newer than 74% of them.
- NPI issued2019 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2015 · median 2008 among the 4,208 with a school on file
- Record last updated2023 · 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).
34 internal medicine physician records list a practice address in Monroeville
They are 34 of the 1,646 NPPES records with a practice address in Monroeville, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Monroeville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Bonacorsi, M.D.Monroeville, PA 151461730180308
- Francis Colangelo, MDMonroeville, PA 151461255374633
- Joseph Dicroce, M.D.Monroeville, PA 151461275580748
- Michael Filiaggi, DOMonroeville, PA 151461639150642
- Richard McQuigg, MDMonroeville, PA 151461194760116
- Ezz Eldin Moukamal, MDMonroeville, PA 151461306828421
- Shawn NaseemMonroeville, PA 151461972577112
- Kenneth PloweyMonroeville, PA 151461184674012
Common questions
What is John Thomas Flaherty, D.O.'s NPI number?
John Thomas Flaherty, D.O.'s National Provider Identifier (NPI) is 1861055501, issued on Apr 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is John Thomas Flaherty, D.O. located?
The NPPES record lists a practice address at 2775 Mosside Blvd, Monroeville, PA, 15146. Phone: (412) 357-3000. Providers update this record themselves, so call before visiting.
How can I verify John Thomas Flaherty, D.O.'s license?
NPPES lists Pennsylvania license number OS022234, 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 John Thomas Flaherty, D.O. prescribe under Medicare Part D?
In 2024, John Thomas Flaherty, D.O. had 376 Medicare Part D claims for 165 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is John Thomas Flaherty, D.O.'s MIPS final score?
The 2023 MIPS final score is 77.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.