Merrill H. Stewart Iii, MD

Medicare activity in 2024

Official CMS public-use data for Merrill H. Stewart Iii, 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. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)229 services
2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)187 services
3. Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician (93016)76 services
4. Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)76 services
5. Critical care, first 30-74 minutes (99291)65 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%
• Ischemic heart disease54%
• Heart failure50%
• Arthritis48%
• Chronic kidney disease44%

Hospitals where Merrill H. Stewart Iii works

Medicare's Facility Affiliation Data lists Merrill H. Stewart Iii 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.

• Ochsner Medical Center AcuteNew Orleans, LA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 190036

Practice locations

Addresses where Merrill H. Stewart Iii is enrolled with Medicare (CMS data updated October 2, 2026).

• 1514 Jefferson HwyNew Orleans, LA 70121 (504) 842‑3000

Group practices

Medicare enrollment lists Merrill H. Stewart Iii as a member of this group (CMS data updated October 2, 2026).

• Ochsner Clinic LLC2,864 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in Louisiana →

Other cardiologists in New Orleans

Clinicians with the same Medicare primary specialty in New Orleans, LA — not a recommendation.

• Hamid R. Alai, MD
• Aaron W. Sweeney, MD
• David R. Janz, MD
• Patrice Delafontaine, MD
• Dominique Williams, MD
• Kelly K. Gajewski, MD
• Kevin D. Cartwright, MD
• James Wever Pinzon, MD

All cardiologists in New Orleans →

Other clinicians in Ochsner Clinic LLC

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

• Andrew Schroth, MD
• Mamie C. Keller, PA
• Angela K. Richards, NP
• Wendy R. Cambre, CNA
• Tracey Murry, CP
• Catherine F. Gaston, CSW

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