Paul S. Massimiano, MD

Medicare activity in 2024

Official CMS public-use data for Paul S. Massimiano, 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. Coronary artery bypass using artery graft, 1 graft (33533)45 services
2. Harvest of vein using an endoscope (33508)39 services
3. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)35 services
4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)31 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)30 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 disease75%
• Heart failure53%
• Arthritis51%
• Atrial fibrillation51%

Hospitals where Paul S. Massimiano works

Medicare's Facility Affiliation Data lists Paul S. Massimiano 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.

• Adventist Healthcare White Oak Medical CenterSilver Spring, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210016
• Winchester Medical CenterWinchester, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490005

Practice locations

Addresses where Paul S. Massimiano is enrolled with Medicare (CMS data updated October 2, 2026).

• 9901 Medical Ctr DrRockville, MD 20850 (301) 279‑6000

Group practices

Medicare enrollment lists Paul S. Massimiano as a member of this group (CMS data updated October 2, 2026).

• Adventist Physician Services Inc148 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary
• Thoracic Surgeryalso
• Vascular Surgeryalso

Find other Cardiovascular Disease (Cardiology) doctors in Maryland →

Other cardiologists in Rockville

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

• Shubir Sofat, MD
• Tanveer A. Malik, MD
• Robert Dibianco, MD
• Dennis C. Friedman, MD
• Bobby Ghosh, MD
• Sameer Sofat, MD
• Joann Urquhart, MD
• Radhey S. Murarka, MD

All cardiologists in Rockville →

Other clinicians in Adventist Physician Services Inc

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

• Jared Antevil, MD
• Weldemariam Mezghebe, PA
• John McCarthy, NP
• Heather Tropiano, CP
• Bryan M. White, MD
• Christaina Wabeke, 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