Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Hospitalist

Ann Thomas, MD

Works at hospitals in Tulsa, OK · Oklahoma

Summary

Ann Thomas, MD (Hospitalist) is listed by Medicare at 1 hospital in Tulsa, OK. NPI 1275797581. 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 Ann Thomas, 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

HospitalistPrimary specialty
YesAccepts Medicare assignment
22Years since medical school (graduated 2004)
FemaleGender (as listed)
Warren Clinic IncGroup practice

Quick answers

Which hospitals does Ann Thomas work at?
Medicare's official clinician data lists Ann Thomas at 1 hospital: Saint Francis Hospital, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Ann Thomas see patients?
Medicare's clinician data lists 1 practice location in Tulsa, OK. Call before your visit to confirm the address.
What is Ann Thomas's specialty?
Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
Does Ann Thomas accept Medicare assignment?
Yes. Medicare's clinician data says Ann Thomas 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 Ann Thomas?
(918) 502-4720, as listed in official Medicare / NPI Registry data.
What is Ann Thomas's NPI number?
1275797581. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Ann Thomas works

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

Group practices

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

  • Warren Clinic Inc883 clinicians in the group

Specialties

Find other Hospitalist doctors in Oklahoma →

Other hospitalists in Tulsa

Clinicians with the same Medicare primary specialty in Tulsa, OK — not a recommendation.

All hospitalists in Tulsa →

Clinician information

CredentialMD
Graduation year2004
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1275797581
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