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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM ROYSTER MD, PHD
NPI 1093160855
Surgery - Surgical Oncology in Park Ridge, IL

Active since April 29, 2016PECOS Enrolled
1875 DEMPSTER ST STE 465, PARK RIDGE, IL 60068(847) 318-9071 Get Directions Write a Review

NPPES record last updated: July 31, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 31, 2026, May 27, 2025, Aug 2, 2024 (3 updates tracked since 2024).

About William Royster Md, Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM ROYSTER MD, PHD (NPI 1093160855) is an individual surgical oncology provider in Park Ridge, Illinois, licensed in Illinois (036178261) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1093160855
Entity TypeIndividualMale
Primary Taxonomy2086X0206X
Provider Legal NameWILLIAM ROYSTERCredential: MD, PHD
Location Address1875 DEMPSTER ST STE 465Park Ridge, IL 60068-1129
Mailing Address1875 Dempster St Ste 465Park Ridge, IL 60068-1129
Phone(847) 318-9071
Sole ProprietorNo
Enumeration DateApril 29, 2016
Last NPPES UpdateJuly 31, 20263 updates tracked since enumeration
NPPES CertifiedJuly 31, 2026
✔ NPI 1093160855 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Surgical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2086X0206X
License✔ Licensed in IL · 036178261
Definition
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.
1875 DEMPSTER ST STE 465, Park Ridge, IL 60068
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Royster Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60068 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$183.39 typical visit price
range $60.08 – $183.39
Typical copayment $45.84 (range $15.02 – $45.84)
Most-billed visit code 99205
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. VEENA HAMILL MD
Obstetrics & Gynecology
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (847) 825-1100
DAISY OCEGUERA MD
Obstetrics & Gynecology
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (847) 825-1100
SASHA NUHN
Obstetrics & Gynecology
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (847) 825-1100
MERIT NASSIF MD, FACOG
Obstetrics & Gynecology
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (732) 642-3144
DR. MEGAN ELIZABETH DONZELLI DO
Obstetrics & Gynecology
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (847) 825-1100
SOPHIE CAROLYN DRESCHER PA-C
Physician Assistant
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (847) 318-9071
ELIJAH MORRIS DO
Obstetrics & Gynecology
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (847) 825-1100
DR. MARIN NIKOLOV MARINOV M.D.
Surgery
1875 DEMPSTER ST STE 465
PARK RIDGE, IL 60068
Cook County (847) 318-9071

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Royster's NPI number?

The NPI number for William Royster is 1093160855. It was assigned to this individual provider in the NPPES registry on April 29, 2016.

Where is William Royster located?

William Royster practices at 1875 Dempster St Ste 465, Park Ridge, IL 60068. The listed phone number is (847) 318-9071.

What is William Royster's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.

Is William Royster enrolled in Medicare?

Yes. William Royster is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for William Royster was last updated on July 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.