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ANDREW EASTON WILLIAMS MD
NPI 1639704836
Radiology - Diagnostic Radiology in Evanston, IL

Active since March 08, 2020PECOS Enrolled
2650 RIDGE AVE, DEPARTMENT OF RADIOLOGY, EVANSTON, IL 60201(847) 570-2475(847) 570-2942 Get Directions Write a Review

NPPES record last updated: May 28, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 28, 2026, Jun 16, 2021, Apr 1, 2021 and 1 more (4 updates tracked since 2020).

About Andrew Easton Williams Md NPPES

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

ANDREW EASTON WILLIAMS MD (NPI 1639704836) is an individual diagnostic radiology provider in Evanston, Illinois, licensed in Illinois (036178323) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Texas Tech University Health Science Center School Of Medicine (2021).

NPPES Registry Identity

NPI1639704836
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameANDREW EASTON WILLIAMSCredential: MD
Location Address2650 RIDGE AVE, DEPARTMENT OF RADIOLOGYEvanston, IL 60201-1718
Mailing Address2650 Ridge Ave Ste 1223Evanston, IL 60201-1700 · (847) 570-2475 · Fax (847) 570-2942
Phone(847) 570-2475
Fax(847) 570-2942
Sole ProprietorYes
Medical School CMSTexas Tech University Health Science Center School Of MedicineGraduated 2021
Enumeration DateMarch 8, 2020
Last NPPES UpdateMay 28, 20264 updates tracked since enumeration
NPPES CertifiedMay 28, 2026
✔ NPI 1639704836 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in IL · 036178323
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Also ListedInternal MedicineTaxonomy 207R00000X · License 125.078976 (IL)
2650 RIDGE AVE, Evanston, IL 60201
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11740 W Taylor StChicago, IL 60612-7232 · Phone (866) 600-2273
Location 25001 El Paso DrEl Paso, TX 79905-2827 · Phone (915) 215-4360

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Andrew Easton Williams Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5597167924
PECOS Enrollment IDI20260618001003
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.

Medicare Billing Reassignment

Medicare enrollment records show Andrew Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Endeavor Health Medical Group
Same address
Anesthesiology
2650 RIDGE AVE, ANESTHESIOLOGY ROOM 3905
Evanston, IL 60201
  • Reassigned Medicare billing, Illinois enrollment
  • 4,841 clinicians in this Medicare group
NPI 1265695944 (847) 570-2760

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60201 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
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
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 20

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

DR. THOMAS LEE CIBULL M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
2650 RIDGE AVE, EVANSTON HOSPITAL
EVANSTON, IL 60201
Cook County (847) 570-2040
LAUREN ANDERSON MD
Hospitalist
2650 RIDGE AVE
EVANSTON, IL 60201
Cook County (847) 570-1027
DR. DANIEL K. WEST MD
Radiology (Diagnostic Radiology)
2650 RIDGE AVE, DEPARTMENT OF RADIOLOGY, G507
EVANSTON, IL 60201
Cook County (847) 570-2475
JOEL BERNSTEIN M.D.
Radiology (Diagnostic Radiology)
2650 RIDGE AVE, EVANSTON HOSPITAL
EVANSTON, IL 60201
Cook County (847) 570-1206
MATTHEW R. SHERWOOD MD
Internal Medicine
2650 RIDGE AVE, DIVISION OF INTERNAL MEDICINE RM 4324
EVANSTON, IL 60201
Cook County (847) 570-1010
MICHAEL T. GILLAM M.D.
Emergency Medicine
2650 RIDGE AVE, EMERGENCY MEDICINE RM G909
EVANSTON, IL 60201
Cook County (847) 570-2114
MARLENE ANGELICO CNP
Nurse Practitioner (Acute Care)
2650 RIDGE AVE, EMERGENCY MEDICINE, RM G903C
EVANSTON, IL 60201
Cook County (847) 570-1355
MINA KEROLOS MD
Hospitalist
2650 RIDGE AVE
EVANSTON, IL 60201
Cook County (847) 570-1010

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 Andrew Williams's NPI number?

The NPI number for Andrew Williams is 1639704836. It was assigned to this individual provider in the NPPES registry on March 8, 2020.

Where is Andrew Williams located?

Andrew Williams practices at 2650 Ridge Ave Department Of Radiology, Evanston, IL 60201. The listed phone number is (847) 570-2475.

What is Andrew Williams's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Andrew Williams enrolled in Medicare?

Yes. Andrew Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Andrew Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Williams reassigns Medicare benefits to Endeavor Health Medical Group (Evanston, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Andrew Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Andrew Williams was last updated on May 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.