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Family Practice

Theresa M. Thomas, DO

Works at hospitals in Grand Blanc, MI · Detroit, MI · Pontiac, MI · Michigan

Summary

Dr. Theresa M. Thomas, DO is a family doctor at 5900 Waldon Rd, Clarkston, MI 48346. Phone: (248) 625-1058. Accepts Medicare assignment. In 2024, Theresa M. Thomas had 119 Original Medicare patients and 3,209 services. NPI 1407977200. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Theresa M. Thomas, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Theresa M. Thomas accept Medicare assignment?
Yes. Medicare's clinician data says Theresa M. Thomas accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Theresa M. Thomas see?
In 2024, CMS data shows 119 Original Medicare patients and 3,209 services for Theresa M. Thomas. This counts Original Medicare only and measures volume, not quality.
What is Theresa M. Thomas's NPI number?
1407977200. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Theresa M. Thomas, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients119
Services billed to Medicare3,209
Different services or procedures43
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Injection, methylprednisolone acetate, 1 mg (J1010)2,201 services
  2. Insertion of needle into vein for collection of blood sample (36415)198 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)196 services
  4. Injection of drug or substance under skin or into muscle (96372)120 services
  5. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)91 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Arthritis45%
  • Diabetes29%
  • Ischemic heart disease29%
  • Chronic kidney disease29%

Hospitals where Theresa M. Thomas works

Medicare's Facility Affiliation Data lists Theresa M. Thomas at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Theresa M. Thomas is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Theresa M. Thomas as a member of this group (CMS data updated October 2, 2026).

  • Henry Ford Medical Group Genesys97 clinicians in the group

Specialties

Find other Family Practice doctors in Michigan →

Other family doctors in Clarkston

Clinicians with the same Medicare primary specialty in Clarkston, MI — not a recommendation.

All family doctors in Clarkston →

Other clinicians in Henry Ford Medical Group Genesys

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialDO
Medical schoolMichigan State University College Of Osteopathic Medicine
Graduation year2005 (21 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1407977200
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 October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians