Quick answers
- Which hospitals does Timothy J. Williams work at?
- Medicare's official clinician data lists Timothy J. Williams at 5 hospitals: Christian Hospital Northeast, Mercy Hospital Lincoln, Mercy Hospital St Louis, Mercy Hospital Washington and Missouri Baptist Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Timothy J. Williams see patients?
- Medicare's clinician data lists 2 practice locations, including Saint Louis, MO. Call before your visit to confirm the address.
- What is Timothy J. Williams's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does Timothy J. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Timothy J. Williams 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 Timothy J. Williams?
- (314) 996-5772, as listed in official Medicare / NPI Registry data.
- What is Timothy J. Williams's NPI number?
- 1699036731. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Timothy J. Williams works
Medicare's Facility Affiliation Data lists Timothy J. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · CCN 260180
- Mercy Hospital LincolnTroy, MO · Critical Access Hospital · CCN 261319
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · CCN 260052
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · CCN 260108
Practice locations
Addresses where Timothy J. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 3015 N Ballas RdSaint Louis, MO 63131 (314) 996‑5772
- 615 S New Ballas RdSaint Louis, MO 63141 (314) 251‑6339
Group practices
Medicare enrollment lists Timothy J. Williams as a member of these groups (CMS data updated 2026-10-02).
- Physician Groups LC521 clinicians in the group
- Mercy Clinic Adult Hospitalists - St. Louis, LLC137 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Cincinnati College Of Medicine |
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699036731 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians