Marin H. Kollef, MD

Medicare activity in 2024

Official CMS public-use data for Marin H. Kollef, 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. Critical care, first 30-74 minutes (99291)181 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)162 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)53 services
4. Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)24 services
5. Insertion of artery tube for blood sampling or infusion through skin (36620)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 blood pressure75%
• High cholesterol70%
• Chronic kidney disease64%
• Diabetes58%
• Heart failure57%
• Ischemic heart disease54%

Hospitals where Marin H. Kollef works

Medicare's Facility Affiliation Data lists Marin H. Kollef 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 HospitalSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260032
• Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260180

Practice locations

Addresses where Marin H. Kollef is enrolled with Medicare (CMS data updated October 2, 2026).

• 1 Barnes Jew Hosp PlzSaint Louis, MO 63110 (314) 747‑3000

Group practices

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

• Washington University3,029 clinicians in the group

Specialties

• Critical Care (Intensivists)primary
• Internal Medicinealso
• Pulmonary Diseasealso

Find other Critical Care (Intensivists) doctors in Missouri →

Other critical care doctors in Saint Louis

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

• Bryan Kidd, MD
• Jessica L. Nelson, MD
• Bruno Maranhao
• Salam Rafique, MD
• Anandhalakshmi Varadharajan, MD
• James M. Close, MD
• Joshua Helm, MD
• Lauren A. Sattler, MD

All critical care doctors in Saint Louis →

Other clinicians in Washington University

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

• Alexander Aleem, MD
• Pranay G. Rao, MD
• Jamie N. Bunn
• Sarah N. Skender, MD
• Donald L. Hong, MD
• Bryce E. Montane, 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