Mariam M. Sullivan, MD

Medicare activity in 2024

Official CMS public-use data for Mariam M. Sullivan, 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 35 minutes (99232)493 services
2. Hospital discharge day management, more than 30 minutes (99239)136 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)105 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)74 services
5. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)22 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%
• Arthritis67%
• Ischemic heart disease48%
• Heart failure47%
• Chronic kidney disease43%

Hospitals where Mariam M. Sullivan works

Medicare's Facility Affiliation Data lists Mariam M. Sullivan 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.

• Methodist Hospitals of MemphisMemphis, TN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 440049

Practice locations

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

• 4250 Bethel RdOlive Branch, MS 38654 (901) 516‑1290
• 7691 Poplar AveGermantown, TN 38138 (901) 516‑1290

Group practices

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

• Methodist Inpatient Physicians LLC128 clinicians in the group

Specialties

• Hospitalistprimary
• Internal Medicinealso

Find other Hospitalist doctors in Mississippi →

Other hospitalists in Olive Branch

Clinicians with the same Medicare primary specialty in Olive Branch, MS — not a recommendation.

• Celeste S. Long, MD
• Michele K. Faircloth, MD
• Buckley K. Dempsey Jr., MD
• Lauren M. Fulmer
• Douglas D. Thaggard, MD
• Amy E. Mauritson, MD
• Karen E. Andrews, MD

All hospitalists in Olive Branch →

Other clinicians in Methodist Inpatient Physicians LLC

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

• Phillip P. Nguyen, NP
• Laurae D. Hicks, MD
• Mohamed Darwish, MD
• Kathryn R. Lynn, NP
• Sarah B. Poplawski, PA
• Celeste S. Long, 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