Margaret J. Garner, DO

Medicare activity in 2024

Official CMS public-use data for Margaret J. Garner, 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.

Most frequent services

1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)131 services
2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)58 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)25 services
4. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)20 services
5. Administration of influenza virus vaccine (G0008)14 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 cholesterol75%
• High blood pressure63%
• Arthritis40%
• Diabetes26%
• Anxiety26%
• Depression23%

Hospitals where Margaret J. Garner works

Medicare's Facility Affiliation Data lists Margaret J. Garner 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.

• Barnes-Jewish St Peters HospitalSaint Peters, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260191
• Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020

Practice locations

Addresses where Margaret J. Garner is enrolled with Medicare (CMS data updated October 2, 2026).

• 107 Piper Hill Dr, Suite 150Saint Peters, MO 63376 (636) 939‑0648

Group practices

Medicare enrollment lists Margaret J. Garner as a member of this group (CMS data updated October 2, 2026).

• Mercy Clinic East Communities571 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Missouri →

Other family doctors in Saint Peters

Clinicians with the same Medicare primary specialty in Saint Peters, MO — not a recommendation.

• Chad M. Voges, MD
• Mark D. Hingst, MD
• Ngozidilenna A. Wilkins, MD
• Delores C. Dotson, MD
• Stephanie L. Baker, DO
• Jordan T. Wills, MD
• Stacy R. Broussard, MD
• Rachael A. Mergenmeier, DO

All family doctors in Saint Peters →

Other clinicians in Mercy Clinic East Communities

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

• Megan Wren
• Christian Verry, MD
• Richard X. Brennan, MD
• Jeremiah Cox, MD
• Christina C. Bearden
• Seema K. Iyer, MD

Clinician information

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