George J. Koullias

Medicare activity in 2024

Official CMS public-use data for George J. Koullias, 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)147 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)137 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)125 services
4. Ultrasound study of one arm or leg veins with compression and maneuvers (93971)82 services
5. Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less (15271)48 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 disease61%
• Arthritis58%
• Diabetes50%
• Chronic kidney disease45%

Hospitals where George J. Koullias works

Medicare's Facility Affiliation Data lists George J. Koullias 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.

• St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330401

Practice locations

Addresses where George J. Koullias is enrolled with Medicare (CMS data updated October 2, 2026).

• 48 Route 25a, Suite 303Smithtown, NY 11787 (631) 862‑3696
• 761 Merrick AveWestbury, NY 11590 (516) 302‑8560

Group practices

Medicare enrollment lists George J. Koullias as a member of this group (CMS data updated October 2, 2026).

• CHS Physician Partners PC743 clinicians in the group

Specialties

• Vascular Surgeryprimary

Find other Vascular Surgery doctors in New York →

Other vascular surgeons in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

• Robert L. Streisand, MD
• Paul M. Anain, MD
• Suroosh S. Marzban, MD
• Alexander D. Dibartolomeo, MD
• David S. Landau, MD
• Angela A. Kokkosis, MD
• Syed Ali R. Rizvi, DO
• Spyridon Monastiriotis, MD

All vascular surgeons in New York →

Other clinicians in CHS Physician Partners PC

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

• Aimee Q. Cowan, MD
• Thomas J. Dowling Iii, MD
• Eleni Manitaras, PA
• Michael N. Kang, MD
• Scott Capustin, MD
• Oosman A. Tariq, 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