Marcus Messmer
Medical Oncology Physician · Philadelphia, PA
Marcus Messmer is a medical oncology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1285070490, issued on May 14, 2013. Check the license (Pennsylvania MD474051, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Marcus Messmer
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- MD474051 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3401 N Broad St, Philadelphia, PA 19140
- Phone
- (215) 707-4000
- Enumerated
- May 14, 2013
- Record last updated
- Jul 7, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210713002327); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 265 in Pennsylvania → Look up another NPI →
Also registered at 3401 N Broad St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rehab Abdel-Kariem, M.D.Emergency Medicine Physician1508008434
- Abdelaal Abdelbaky, MDNeurological Surgery Physician1437429107
- Ziyodakhon Abdujabborova, MDInternal Medicine Physician1699391839
- Asia Abdul-Haqq, CNMAdvanced Practice Midwife1588679161
Verify Marcus Messmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD474051Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average medical oncology physician in 2024
465 Medicare Part D claims for 62 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Brukinsa94 claims
- Prednisone40 claims
- Calquence33 claims
- Ondansetron Hcl32 claims
- Allopurinol30 claims
- Olanzapine29 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): 76.7 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).
Industry payments in 2024: $3,589.70
21 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Temple Faculty Practice Plan IncPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marcus Messmer among 265 medical oncology physician records in Pennsylvania
Marcus Messmer is one of 265 medical 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 2013, is newer than 81% of them.
- NPI issued2013 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2014 · median 2002 among the 189 with a school on file
- Record last updated2021 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Pennsylvania
There are 265 medical oncology physician records in Pennsylvania.
All 265 in Pennsylvania → Every provider in Philadelphia → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Joyce Habib, M.D.Philadelphia, PA 191401881824886
- Jean-Pierre Issa, M.D.Philadelphia, PA 191401922168475
- Juhi Mittal, MDPhiladelphia, PA 191401336308527
- Aruna Padmanabhan, MDPhiladelphia, PA 191401619159373
- Alvaro Pereira-Rico, M.D.Philadelphia, PA 191401639198880
- Anthony Stack, DOPhiladelphia, PA 191401912491663
- Alexander Gaitanis, D.O.Philadelphia, PA 191411114937844
- Gabor Varadi, MDPhiladelphia, PA 191411780894352
Common questions
What is Marcus Messmer's NPI number?
Marcus Messmer's National Provider Identifier (NPI) is 1285070490, issued on May 14, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Marcus Messmer located?
The NPPES record lists a practice address at 3401 N Broad St, Philadelphia, PA, 19140. Phone: (215) 707-4000. Providers update this record themselves, so call before visiting.
How can I verify Marcus Messmer's license?
NPPES lists Pennsylvania license number MD474051, 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 Marcus Messmer prescribe under Medicare Part D?
In 2024, Marcus Messmer had 465 Medicare Part D claims for 62 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Marcus Messmer's MIPS final score?
The 2023 MIPS final score is 76.7 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.