Unni K. Marar, MD

Medicare activity in 2024

Official CMS public-use data for Unni K. Marar, 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. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)628 services
2. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)259 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)255 services
4. Ultrasound of heart blood flow, valves and chambers, follow-up (93321)76 services
5. Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)74 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%
• Arthritis63%
• Ischemic heart disease53%
• Diabetes39%
• Chronic kidney disease39%

Hospitals where Unni K. Marar works

Medicare's Facility Affiliation Data lists Unni K. Marar 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.

• Ohio State University State Health SystemColumbus, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360085

Practice locations

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

• 543 Taylor AveColumbus, OH 43203 (614) 688‑6400

Group practices

Medicare enrollment lists Unni K. Marar as a member of this group (CMS data updated October 2, 2026).

• OSU Internal Medicine LLC1,161 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in Ohio →

Other cardiologists in Columbus

Clinicians with the same Medicare primary specialty in Columbus, OH — not a recommendation.

• John A. Larry, MD
• Hannah M. Jacobs, DO
• Andrew R. Yates, MD
• Dennis A. Calnon, MD
• Matthew Tong, DO
• Thomas Goodlive, MD
• Todd G. Matros, MD
• Vijay Ravipati, MD

All cardiologists in Columbus →

Other clinicians in OSU Internal Medicine LLC

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

• Shauna L. Iarocci
• William T. Abraham, MD
• Richard Wu, MD
• Sheryl A. Pfeil, MD
• Sumithira Vasu, MD
• Ryan McGrath, 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