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Family Practice

Bob G. William, MD

Works at hospitals in Naperville, IL · Chicago, IL · Illinois

Summary

Bob G. William, MD (Family Practice) is listed by Medicare at 2 hospitals in Naperville, IL and Chicago, IL. NPI 1114111028. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Bob G. William, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Family PracticePrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
20Years since medical school (graduated 2006)
MaleGender (as listed)
Endeavor Health Medical GroupGroup practice

Quick answers

Which hospitals does Bob G. William work at?
Medicare's official clinician data lists Bob G. William at 2 hospitals: Edward Hospital and Swedish Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Bob G. William see patients?
Medicare's clinician data lists 1 practice location in Elmhurst, IL. Call before your visit to confirm the address.
What is Bob G. William's specialty?
Medicare lists Family Practice as the primary specialty.
Does Bob G. William accept Medicare assignment?
Yes. Medicare's clinician data says Bob G. William accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Bob G. William offer telehealth?
Medicare's clinician data says Bob G. William offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Bob G. William?
(331) 221-0096, as listed in official Medicare / NPI Registry data.
What is Bob G. William's NPI number?
1114111028. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Bob G. William works

Medicare's Facility Affiliation Data lists Bob G. William at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Bob G. William is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Bob G. William as a member of this group (CMS data updated 2026-10-02).

  • Endeavor Health Medical Group3,350 clinicians in the group

Specialties

Find other Family Practice doctors in Illinois →

Other family doctors in Elmhurst

Clinicians with the same Medicare primary specialty in Elmhurst, IL — not a recommendation.

All family doctors in Elmhurst →

Clinician information

CredentialMD
Graduation year2006
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1114111028
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians