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Internal Medicine

Theodore Ross, MD

Works at hospitals in Granite City, IL · Belleville, IL · Centreville, IL · Illinois

Summary

Theodore Ross, MD (Internal Medicine) is listed by Medicare at 3 hospitals in Granite City, IL, Belleville, IL and Centreville, IL. NPI 1285720508. 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 Theodore Ross, 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

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
42Years since medical school (graduated 1984)
Washington University School Of MedicineMedical school
MaleGender (as listed)
Southern Illinois Healthcare Foundation IncGroup practice

Quick answers

Which hospitals does Theodore Ross work at?
Medicare's official clinician data lists Theodore Ross at 3 hospitals: Gateway Regional Medical Center, Memorial Hospital and Touchette Regional Hospital Inc. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Theodore Ross see patients?
Medicare's clinician data lists 2 practice locations, including East Saint Louis, IL and Centreville, IL. Call before your visit to confirm the address.
What is Theodore Ross's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Theodore Ross accept Medicare assignment?
Yes. Medicare's clinician data says Theodore Ross 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.
What is the phone number for Theodore Ross?
(618) 271-9191, as listed in official Medicare / NPI Registry data.
What is Theodore Ross's NPI number?
1285720508. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Theodore Ross works

Medicare's Facility Affiliation Data lists Theodore Ross 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 Theodore Ross is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Theodore Ross as a member of this group (CMS data updated 2026-10-02).

  • Southern Illinois Healthcare Foundation Inc119 clinicians in the group

Specialties

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Illinois

Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.

All internal medicine doctors in Illinois →

Clinician information

CredentialMD
Medical schoolWashington University School Of Medicine
Graduation year1984
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1285720508
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