William Royster, MD, PHD
Surgical Oncology Physician · Park Ridge, IL
William Royster, MD, PHD is a surgical oncology physician with a practice address in Park Ridge, Illinois, and NPI 1093160855, issued on Apr 29, 2016. Check the license (Illinois 036178261, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William Royster
- Credential
- MD, PHD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 036178261 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1875 Dempster St Ste 465, Park Ridge, IL 60068
- Phone
- (847) 318-9071
- Enumerated
- Apr 29, 2016
- Record last updated
- Jul 31, 2026
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 71 in Illinois → Look up another NPI →
Also registered at 1875 Dempster St Ste 465
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sophie Drescher, PA-CPhysician Assistant1124914320
- Christy Enright, CNMAdvanced Practice Midwife1407827751
- Veena Hamill, MDObstetrics & Gynecology Physician1023868916
- Aakangsha JainObstetrics & Gynecology Physician1659075042
Verify William Royster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036178261Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average surgical oncology physician in 2024
13 Medicare Part D claims for 11 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 12 claims were for opioids.
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.
William Royster among 71 surgical oncology physician records in Illinois
William Royster, MD, PHD is one of 71 surgical oncology physician records with a practice address in Illinois. 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 2016, is newer than 87% of them.
- NPI issued2016 · 87% of these records are older, 11% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 77% of these records are
- Record last updated2026 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Illinois
There are 71 surgical oncology physician records in Illinois.
All 71 in Illinois → Every provider in Park Ridge → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Helene Sterbling, MDLibertyville, IL 600481144726951
- Denise Monahan, M.D.Lake Forest, IL 600451114170289
- Sonya Sharpless, M.D.Lake Forest, IL 600451396739280
- Myles Cunningham, MDWinnetka, IL 600931205093697
- Elizabeth Poli, M.D.Highland Park, IL 600351316351539
- Katherine Hansen, DOGeneva, IL 601341235360553
- Claudia Perez, D.O.Maywood, IL 601531457568016
- Chantal Reyna, M.D.Maywood, IL 601531902067697
Common questions
What is William Royster, MD, PHD's NPI number?
William Royster, MD, PHD's National Provider Identifier (NPI) is 1093160855, issued on Apr 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is William Royster, MD, PHD located?
The NPPES record lists a practice address at 1875 Dempster St Ste 465, Park Ridge, IL, 60068. Phone: (847) 318-9071. Providers update this record themselves, so call before visiting.
How can I verify William Royster, MD, PHD's license?
NPPES lists Illinois license number 036178261, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Royster, MD, PHD prescribe under Medicare Part D?
In 2024, William Royster, MD, PHD had 13 Medicare Part D claims for 11 beneficiaries; the average among surgical oncology physician prescribers was 87. 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.