Seamus P. Whelton, MD

Medicare activity in 2024

Official CMS public-use data for Seamus P. Whelton, 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)1,355 services
2. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)171 services
3. 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)146 services
4. Ct scan of heart structure with contrast (75572)121 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)99 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%
• Ischemic heart disease56%
• Arthritis55%
• Heart failure46%
• Atrial fibrillation46%

Hospitals where Seamus P. Whelton works

Medicare's Facility Affiliation Data lists Seamus P. Whelton 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.

• Greater Baltimore Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210044
• Johns Hopkins Bayview Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210029
• Johns Hopkins Howard County Medical CenterColumbia, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210048
• The Johns Hopkins HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210009
• University of MD St Joseph Medical CenterTowson, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210063

Practice locations

Addresses where Seamus P. Whelton is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.

• 1800 Orleans StBaltimore, MD 21287 (410) 955‑5000
• 4940 Eastern AveBaltimore, MD 21224
• 600 N Wolf StBaltimore, MD 21287
• 600 N Wolfe St, Blalock 266Baltimore, MD 21287 (410) 502‑4340
• 601 N Caroline StBaltimore, MD 21287

Group practices

Medicare enrollment lists Seamus P. Whelton 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

• Cardiovascular Disease (Cardiology)primary
• Internal Medicinealso

Find other Cardiovascular Disease (Cardiology) doctors in Maryland →

Other cardiologists in Baltimore

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

• Nino Isakadze, MD
• Jonathan D. Gardner, MD
• Harry A. Silber, MD
• Brad Pfeffer, MD
• Tomas Ayala, MD
• Federico Viganego, MD
• Jeffrey A. Brinker, MD
• Jose Madrazo, MD

All cardiologists in Baltimore →

Other clinicians in Johns Hopkins University

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

• Mark G. Lazarev, MD
• Grant J. Anhalt, MD
• Preeti Raghavan, MD
• Kathryn Ritter, MD
• Linda Borneman, NP
• Brian R. Matlaga, 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