Gajan Sivananthan, MD

Medicare activity in 2024

Official CMS public-use data for Gajan Sivananthan, 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. Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)76 services
2. Ultrasonic guidance for blood vessel access (76937)38 services
3. Fluoroscopic guidance for insertion or removal of central vein access device (77001)24 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)20 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)18 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%
• Chronic kidney disease61%
• Diabetes52%
• Arthritis51%
• Ischemic heart disease51%

Hospitals where Gajan Sivananthan works

Medicare's Facility Affiliation Data lists Gajan Sivananthan 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.

• MedStar Washington Hospital CenterWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090011

Practice locations

Addresses where Gajan Sivananthan is enrolled with Medicare (CMS data updated October 2, 2026).

• 110 Irving St NWWashington, DC 20010 (202) 877‑7000
• 25500 Point Lookout RdLeonardtown, MD 20650 (240) 434‑4088
• 3001 S Hanover StBaltimore, MD 21225 (410) 350‑3200
• 3800 Reservoir Rd NWWashington, DC 20007 (202) 444‑2000

Group practices

Medicare enrollment lists Gajan Sivananthan as a member of this group (CMS data updated October 2, 2026).

• MedStar Medical Group II LLC3,767 clinicians in the group

Specialties

• Interventional Radiologyprimary

Find other Interventional Radiology doctors in District of Columbia →

Other interventional radiologists in Washington

Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.

• Quang H. Nguyen, MD
• Nora E. McDermott-Tabori, MD
• Adam Fang, MD
• Meghal R. Antani, MD
• Nariman Nezami, MD
• Maryam Boumezrag, MD
• Akemi Miller, MD
• Andrew Akman, MD

All interventional radiologists in Washington →

Other clinicians in MedStar Medical Group II LLC

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

• Allison N. Sobin, NP
• Claudia Barrett, PA
• Lawrence D. White, MD
• Erika Shor, CNA
• Madeleine Caughey, NP
• Jeongae Yoon, 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