Mark O'Hara, MD
Hematology & Oncology Physician · Philadelphia, PA
Mark O'Hara, MD is a hematology & oncology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1225291933, issued on Jul 3, 2008. Check the license (Pennsylvania MD444150, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark O'Hara
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- MD444150 PA
MT193503 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Spruce St, Philadelphia, PA 19104
- Phone
- (215) 360-0735
- Enumerated
- Jul 3, 2008
- Record last updated
- Nov 17, 2022
- Medicare enrollment
- Enrolled (PECOS I20150611001357); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 784 in Pennsylvania → Look up another NPI →
Also registered at 3400 Spruce St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Abbott, CRNPNurse Practitioner1396771689
- Michael Abboud, MDEmergency Medicine Physician1962820852
- Emily AbdelmessihPediatric Pharmacist1891612560
- Mohammed AbdullahStudent in an Organized Health Care Education/Training Program1013595495
- Amin Abedini, MDStudent in an Organized Health Care Education/Training Program1912609017
- Farid Aboharb, MD, PHDStudent in an Organized Health Care Education/Training Program1295595973
Verify Mark O'Hara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD444150Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
167 Medicare Part D claims for 69 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 18 claims were for opioids.
Most prescribed
- Prochlorperazine Maleate16 claims
- Ondansetron Hcl15 claims
- Creon14 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): 85.5 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 Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark O'Hara among 784 hematology & oncology physician records in Pennsylvania
Mark O'Hara, MD is one of 784 hematology & oncology physician records with a practice address in Pennsylvania. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 54% of them.
- NPI issued2008 · 54% of these records are older, 40% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2008 · median 2004 among the 553 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Pennsylvania
There are 784 hematology & oncology physician records in Pennsylvania.
All 784 in Pennsylvania → Every provider in Philadelphia → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Roger Cohen, MDPhiladelphia, PA 191041639146939
- Nevena Damjanov, MDPhiladelphia, PA 191041518954395
- Andrew Dancis, MDPhiladelphia, PA 191041316988249
- Arthur Feldman, MDPhiladelphia, PA 191041518966357
- Patrick Fogarty, MDPhiladelphia, PA 191041528016052
- Steven Freedman, M.D./PH.D.Philadelphia, PA 191041417932757
- Alison Loren, MDPhiladelphia, PA 191041942241641
- Carlos Madamba, MDPhiladelphia, PA 191041811994866
Common questions
What is Mark O'Hara, MD's NPI number?
Mark O'Hara, MD's National Provider Identifier (NPI) is 1225291933, issued on Jul 3, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mark O'Hara, MD located?
The NPPES record lists a practice address at 3400 Spruce St, Philadelphia, PA, 19104. Phone: (215) 360-0735. Providers update this record themselves, so call before visiting.
How can I verify Mark O'Hara, MD's license?
NPPES lists Pennsylvania license number MD444150, 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 Mark O'Hara, MD prescribe under Medicare Part D?
In 2024, Mark O'Hara, MD had 167 Medicare Part D claims for 69 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Mark O'Hara, MD's MIPS final score?
The 2023 MIPS final score is 85.5 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.