John M. Maris, M.D.
Pediatric Hematology & Oncology Physician · Philadelphia, PA
John M. Maris, M.D. is a pediatric hematology & oncology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1275557787, issued on Jul 27, 2006. Check the license (Pennsylvania MD044988L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John M. Maris
- Credential
- M.D.
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License number
- MD044988L PA
Self-reported in NPPES; status is on the state search - Practice location
- 3401 Civic Center Blvd, Philadelphia, PA 19104
- Phone
- (215) 590-3535
- Enumerated
- Jul 27, 2006
- Record last updated
- Apr 15, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (215) 590-3992
- Medicaid IDs
- 001539508 PA
6558305 NJ - Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 218 in Pennsylvania → Look up another NPI →
Also registered at 3401 Civic Center Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John M. Maris in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD044988LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $1,000.00
1 payment: consulting fee; the largest payer was Jubilant DraxImage Inc. The 1,215 providers of this specialty with any payment received $7,404.07 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.
John M. Maris among 218 pediatric hematology & oncology physician records in Pennsylvania
John M. Maris, M.D. is one of 218 pediatric hematology & oncology physician records with a practice address in Pennsylvania. 41% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 64% newer
- In a Medicare fileYes · 41% of these records are
- In the CMS Doctors and Clinicians fileNo · 25% of these records are
- Record last updated2013 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0207X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Hematology & Oncology Physician providers in Pennsylvania
There are 218 pediatric hematology & oncology physician records in Pennsylvania.
All 218 in Pennsylvania → Every provider in Philadelphia → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Peter Adamson, M.D.Philadelphia, PA 191041548285943
- Edward Attiyeh, M.D.Philadelphia, PA 191041194741207
- Rochelle Bagatell Berg, MDPhiladelphia, PA 191041285606095
- Leonard Bailey, M.D.Philadelphia, PA 191041134153612
- Vandana Batra, MDPhiladelphia, PA 191041659322147
- Samuel Blackman, MD, PHDPhiladelphia, PA 191041790782605
- Stella Chou, M.D.Philadelphia, PA 191041104856509
- Katherine High, MDPhiladelphia, PA 191041548203847
Common questions
What is John M. Maris, M.D.'s NPI number?
John M. Maris, M.D.'s National Provider Identifier (NPI) is 1275557787, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John M. Maris, M.D. located?
The NPPES record lists a practice address at 3401 Civic Center Blvd, Philadelphia, PA, 19104. Phone: (215) 590-3535. Providers update this record themselves, so call before visiting.
How can I verify John M. Maris, M.D.'s license?
NPPES lists Pennsylvania license number MD044988L, 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.
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.