Catherine L. Washburn, MD

Medicare activity in 2024

Official CMS public-use data for Catherine L. Washburn, 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)244 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)50 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)33 services
4. Hospital discharge day management, more than 30 minutes (99239)22 services
5. Hospital discharge day management, 30 minutes or less (99238)13 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%
• Arthritis65%
• Heart failure63%
• Diabetes58%
• Ischemic heart disease54%

Hospitals where Catherine L. Washburn works

Medicare's Facility Affiliation Data lists Catherine L. Washburn 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.

• Johns Hopkins Bayview Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210029

Practice locations

Addresses where Catherine L. Washburn is enrolled with Medicare (CMS data updated October 2, 2026).

• 4940 Eastern AveBaltimore, MD 21224 (410) 550‑0100
• 600 N Wolf StBaltimore, MD 21287 (410) 955‑5000
• 600 N Wolfe St, Blalock 266Baltimore, MD 21287 (410) 502‑4340

Group practices

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

• Johns Hopkins University2,909 clinicians in the group
• Johns Hopkins University713 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Maryland →

Other internal medicine doctors in Baltimore

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

• Gregory Lucas, MD
• Syed Ali, MD
• Cynthia M. Boyd, MD
• Stephanie L. Linder, MD
• Henry J. Michtalik, MD
• Preeya Fozdar, MD
• Janak V. Gopal, MD
• Aseem Sood, MD

All internal medicine doctors in Baltimore →

Other clinicians in Johns Hopkins University

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

• Oscar J. Bienvenu, MD
• Armine K. Smith, MD
• Otis Brawley, MD
• Georganne Jambeter
• Elisabeth M. Nickels, CP
• Marie Defrancesco-Loukas, NP

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