Joseph L. Roswarski, MD

Medicare activity in 2024

Official CMS public-use data for Joseph L. Roswarski, 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 50 minutes (99233)249 services
2. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)163 services
3. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)136 services
4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)51 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)37 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%
• Arthritis52%
• Ischemic heart disease44%
• Diabetes36%
• Anxiety31%

Hospitals where Joseph L. Roswarski works

Medicare's Facility Affiliation Data lists Joseph L. Roswarski 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 Georgetown University HospitalWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090004
• MedStar Saint Mary's HospitalLeonardtown, MD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 210028
• 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 Joseph L. Roswarski is enrolled with Medicare (CMS data updated October 2, 2026).

• 3800 Reservoir Rd NWWashington, DC 20007 (202) 444‑2000

Group practices

Medicare enrollment lists Joseph L. Roswarski as a member of these groups (CMS data updated October 2, 2026).

• MedStar Medical Group II LLC3,767 clinicians in the group
• Regional Cancer Care Associates LLC151 clinicians in the group

Specialties

• Medical Oncologyprimary
• Hematologyalso
• Radiation Oncologyalso

Find other Medical Oncology doctors in District of Columbia →

Other oncologists in Washington

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

• Kristen D. Whitaker, MD
• Miriam Jacobs, MD
• Matthias Holdhoff, MD
• Sunil Adige, MD
• Elaine Walsh, MD
• Geoffrey T. Gibney, MD
• Jean H. Hoffman-Censits, MD
• Claudine J. Isaacs, MD

All oncologists in Washington →

Other clinicians in MedStar Medical Group II LLC

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

• Zarana H. Patel, MD
• Meghan Veno, MD
• Shubhro Bose, MD
• Anjuli Jain, MD
• Limei Qin, AA
• Kimberly Kenney, 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