Apostolos K. Tassiopoulos, MD

Medicare activity in 2024

Official CMS public-use data for Apostolos K. Tassiopoulos, 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. Ultrasound study of arm or leg veins with compression and maneuvers (93970)952 services
2. Ultrasound study of one arm or leg veins with compression and maneuvers (93971)370 services
3. Ultrasound of both sides of head and neck blood flow (93880)358 services
4. Ultrasound study of arm and leg arteries (93922)225 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)166 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 disease62%
• Arthritis56%
• Diabetes47%
• Chronic kidney disease44%

Hospitals where Apostolos K. Tassiopoulos works

Medicare's Facility Affiliation Data lists Apostolos K. Tassiopoulos 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.

• Long Island Community HospitalPatchogue, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330141
• Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330393

Practice locations

Addresses where Apostolos K. Tassiopoulos is enrolled with Medicare (CMS data updated October 2, 2026).

• 255 W Montauk Hwy, Life Care CtrHampton Bays, NY 11946 (631) 723‑5000

Group practices

Medicare enrollment lists Apostolos K. Tassiopoulos as a member of this group (CMS data updated October 2, 2026).

• Stony Brook Surgical Associates University Faculty Practice Corporati109 clinicians in the group

Specialties

• Vascular Surgeryprimary

Find other Vascular Surgery doctors in New York →

Other vascular surgeons in Hampton Bays

Clinicians with the same Medicare primary specialty in Hampton Bays, NY — not a recommendation.

• David S. Landau, MD
• Angela A. Kokkosis, MD
• Stefanos Giannopoulos, MD
• Gurpreet Gill, MD
• Rabih A. Chaer, MD
• Lucyna Z. Price
• Matthew J. Pergamo, MD

All vascular surgeons in Hampton Bays →

Other clinicians in Stony Brook Surgical Associates University Faculty Practice Corporati

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

• Maroun B. Yammine, MD
• Michael Lui, MD
• Alvin Wong, MD
• Aleksandra Krajewski, MD
• Alison M. Jackson, PA
• David A. Schessel, 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