William T. Grizos, MD
Radiation Oncology Physician · Philadelphia, PA
William T. Grizos, MD is a radiation oncology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1811910854, issued on Jul 25, 2006. Check the license (Pennsylvania MD-027845-E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- William T. Grizos
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD-027845-E PA
Self-reported in NPPES; status is on the state search - Practice location
- 8835 Germantown Ave., Philadelphia, PA 19118
- Phone
- (215) 242-1100
- Enumerated
- Jul 25, 2006
- Record last updated
- Sep 26, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (215) 242-1101
- Medicaid IDs
- 001147375 PA
7972601 NJ - Medicare enrollment
- Enrolled (PECOS I20041206000876); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1981
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 383 in Pennsylvania → Look up another NPI →
Verify William T. Grizos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD-027845-ECheck 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 radiation oncology physician in 2024
16 Medicare Part D claims, 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.
Industry payments in 2024: $37.64
2 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,275 providers of this specialty with any payment received $1,897.85 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
- 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).
William T. Grizos among 383 radiation oncology physician records in Pennsylvania
William T. Grizos, MD is one of 383 radiation oncology physician records with a practice address in Pennsylvania. 82% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 51% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1981 · median 2004 among the 285 with a school on file
- Record last updated2012 · 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 2085R0001X and a Pennsylvania 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 Pennsylvania
There are 383 radiation oncology physician records in Pennsylvania.
All 383 in Pennsylvania → Every provider in Philadelphia → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Won Chang, MDPhiladelphia, PA 191151992787618
- Scot Fisher, D.O.Philadelphia, PA 191141780606202
- Eric Gressen, M.D.Philadelphia, PA 191141144242660
- Shari Rudoler, M.D.Philadelphia, PA 191141972525400
- Alyssa Asaro, MDPhiladelphia, PA 191111477355725
- Vladimir Avkshtol, MDPhiladelphia, PA 191111972921062
- Abigail CopellaPhiladelphia, PA 191111619409638
- Yanqun Dong, M.D., PH.D.Philadelphia, PA 191111740522903
Common questions
What is William T. Grizos, MD's NPI number?
William T. Grizos, MD's National Provider Identifier (NPI) is 1811910854, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William T. Grizos, MD located?
The NPPES record lists a practice address at 8835 Germantown Ave., Philadelphia, PA, 19118. Phone: (215) 242-1100. Providers update this record themselves, so call before visiting.
How can I verify William T. Grizos, MD's license?
NPPES lists Pennsylvania license number MD-027845-E, 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 William T. Grizos, MD prescribe under Medicare Part D?
In 2024, William T. Grizos, MD had 16 Medicare Part D claims; 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.