Songul Onder, MD

Medicare activity in 2024

Official CMS public-use data for Songul Onder, 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)320 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)161 services
3. Hemodialysis procedure with physician evaluation (90935)119 services
4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)106 services
5. Dialysis services, 4 or more physician visits per month (20 years or older) (90960)85 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%
• Diabetes75%
• Chronic kidney disease75%
• Heart failure49%
• Ischemic heart disease48%

Hospitals where Songul Onder works

Medicare's Facility Affiliation Data lists Songul Onder 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.

• Umd Rehabilitation & Orthopaedic InstituteBaltimore, MD · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 210058
• University of Maryland Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210002
• University of MD Medical Center Midtown CampusBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210038

Practice locations

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

• 22 S Green StBaltimore, MD 21201 (410) 328‑8040

Group practices

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

• University of Maryland Physicians PA404 clinicians in the group

Specialties

• Nephrologyprimary
• Internal Medicinealso

Find other Nephrology doctors in Maryland →

Other nephrologists in Baltimore

Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.

• Daniel C. Brennan, MD
• Anju Yadav, MD
• Nityasree Srialluri, MD
• Monika Dhillon, MD
• Steven P. Menez, MD
• Kulwant S. Modi, MD
• Neil K. Agarwal, MD
• Nada Alachkar, MD

All nephrologists in Baltimore →

Other clinicians in University of Maryland Physicians PA

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

• Janaki Deepak, MD
• Marc C. Hochberg, MD
• Alison Sivo, NP
• Steven R. Gambert, MD
• Cassidy W. Claassen, MD
• Brian Barr, 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