Mary K. McMahan, MD

Medicare activity in 2024

Official CMS public-use data for Mary K. McMahan, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)314 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)144 services
3. Hospital discharge day management, more than 30 minutes (99239)113 services
4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)12 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%
• Diabetes51%
• Arthritis51%
• Chronic kidney disease48%
• Heart failure48%

Hospitals where Mary K. McMahan works

Medicare's Facility Affiliation Data lists Mary K. McMahan 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.

• Savannah Health Services LLC dba Memorial Health University Medical CenterSavannah, GA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 110036

Practice locations

Addresses where Mary K. McMahan is enrolled with Medicare (CMS data updated October 2, 2026).

• 4700 Waters AveSavannah, GA 31404 (912) 350‑8000
• 4700 Waters Ave, (memorial Health University Medical Center)Savannah, GA 31404 (912) 350‑8000

Group practices

Medicare enrollment lists Mary K. McMahan as a member of these groups (CMS data updated October 2, 2026).

• Cogent Healthcare of Georgia PC249 clinicians in the group
• Hospital Medicine Services of Ga LLC101 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Georgia →

Other internal medicine doctors in Savannah

Clinicians with the same Medicare primary specialty in Savannah, GA — not a recommendation.

• Atsou C. Klougan, MD
• Tai Quach, MD
• Chad H. Martins, MD
• Rebecca A. Nowacki, MD
• Kaye Bardeloza, MD
• Lauren Wood, MD
• Elizabeth Cornell, DO
• Guy R. Maclang, MD

All internal medicine doctors in Savannah →

Other clinicians in Cogent Healthcare of Georgia PC

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

• Gilbert L. Holmes, MD
• Laquetta M. Planter, PA
• Tai Quach, MD
• Tabi Tabe-Ebob, MD
• Kavitha Vemuri, MD
• Richard A. Wall

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