Marshall Andrew Diven, MD, MS
Radiation Oncology Physician · Brooklyn, NY
Marshall Andrew Diven, MD, MS is a radiation oncology physician with a practice address in Brooklyn, New York, and NPI 1649809351, issued on Apr 4, 2020. Check the license on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Marshall Andrew Diven
- Credential
- MD, MS
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 148872 MT
18641A WY
Self-reported in NPPES; status is on the state search - Practice location
- 506 6TH St, Brooklyn, NY 11215
- Phone
- (718) 780-3000
- Enumerated
- Apr 4, 2020
- Record last updated
- Oct 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20251113000298); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, Greenville, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 449 in New York → Look up another NPI →
Also registered at 506 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danielle Abadi, MDPediatrics Physician1003298993
- Haley Abbott, DDSStudent in an Organized Health Care Education/Training Program1568313161
- Jacob Abraham, MDStudent in an Organized Health Care Education/Training Program1043009665
- Maria Abraham, M.D.Pediatrics Physician1184039463
- Alexander Abramov, PA-CPhysician Assistant1487339511
- Eric Abrams, M.D.Emergency Medicine Physician1851737340
Verify Marshall Andrew Diven in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the ProfessionsCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average radiation oncology physician in 2024
29 Medicare Part D claims for 14 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through 2 group practices
- Billings ClinicCody, WY
- Memorial Hospital OF Sheridan CountySheridan, WY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marshall Andrew Diven among 449 radiation oncology physician records in New York
Marshall Andrew Diven, MD, MS is one of 449 radiation oncology physician records with a practice address in New York. 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 2020, is newer than 92% of them.
- NPI issued2020 · 92% of these records are older, 4% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2019 · median 2005 among the 331 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in New York
There are 449 radiation oncology physician records in New York.
All 449 in New York → Every provider in Brooklyn → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Hani Ashamalla, MDBrooklyn, NY 112151467435701
- Bahaa Mokhtar, MDBrooklyn, NY 112151790768034
- Kapilagauri Parikh, MDBrooklyn, NY 112151215911094
- Juliana Runnels, MDBrooklyn, NY 112151063036366
- David Berlach, MD CMBrooklyn, NY 112201811275514
- Thomas Daniels, M.D.Brooklyn, NY 112201700863875
- Jared Rowley, M.D.Brooklyn, NY 112201588197453
- Joseph Safdieh, MDBrooklyn, NY 112101790078590
Common questions
What is Marshall Andrew Diven, MD, MS's NPI number?
Marshall Andrew Diven, MD, MS's National Provider Identifier (NPI) is 1649809351, issued on Apr 4, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Marshall Andrew Diven, MD, MS located?
The NPPES record lists a practice address at 506 6TH St, Brooklyn, NY, 11215. Phone: (718) 780-3000. Providers update this record themselves, so call before visiting.
How can I verify Marshall Andrew Diven, MD, MS's license?
Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marshall Andrew Diven, MD, MS prescribe under Medicare Part D?
In 2024, Marshall Andrew Diven, MD, MS had 29 Medicare Part D claims for 14 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.