Andrew Williams, MD
NPI 1639704836 · Diagnostic Radiology Physician · Evanston, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Williams, MD is a Diagnostic Radiology Physician provider in Evanston, IL (NPI 1639704836).
Provider details
- NPI number
- 1639704836
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 125.078976 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$64 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 1740 W Taylor StChicago, IL 60612-7232Phone: (866) 600-2273
- 5001 El Paso DrEl Paso, TX 79905-2827Phone: (915) 215-4360
Registry dates
- Enumerated
- 2020-03-08
- Last updated
- 2026-05-28
- Certified
- 2026-05-28
Frequently asked questions
- What is Andrew Williams's NPI number?
- Andrew Williams's National Provider Identifier (NPI) is 1639704836, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Williams's specialty?
- Andrew Williams is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Williams located?
- Andrew Williams's practice location on file with NPPES is 2650 Ridge Ave, Evanston, IL 60201-1718.
- What is Andrew Williams's phone number?
- The practice phone number listed in the NPPES registry for Andrew Williams is (847) 570-2475.
- Does Andrew Williams accept Medicare?
- Andrew Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Williams's NPI active?
- Yes — Andrew Williams's NPI (1639704836) is active in the NPPES registry as of the last update on 2026-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.