Maria A. Giannopoulos, MD

Medicare activity in 2024

Official CMS public-use data for Maria A. Giannopoulos, 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. Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)17 services
2. Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory (Q0091)14 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 cholesterol75%
• High blood pressure57%

Hospitals where Maria A. Giannopoulos works

Medicare's Facility Affiliation Data lists Maria A. Giannopoulos 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.

• North Shore University HospitalManhasset, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330106

Practice locations

Addresses where Maria A. Giannopoulos is enrolled with Medicare (CMS data updated October 2, 2026).

• 877 Stewart Ave, Suite 7Garden City, NY 11530 (516) 222‑0722

Group practices

Medicare enrollment lists Maria A. Giannopoulos as a member of this group (CMS data updated October 2, 2026).

• North Shore Lij Ob Gyn at Garden City PC11 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in New York →

Other OB-GYNs in Garden City

Clinicians with the same Medicare primary specialty in Garden City, NY — not a recommendation.

• Matthew J. Dilena, MD
• Samantha M. Bandremer, MD
• Marc S. Behar, MD
• Michael Mesbah, MD
• Yuri Argov, MD
• Sarai Paniccia, DO
• Dana M. Almeida, DO
• Seth Plancher, MD

All OB-GYNs in Garden City →

Other clinicians in North Shore Lij Ob Gyn at Garden City PC

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

• Samantha M. Bandremer, MD
• Sherri E. Putterman, MD
• Sophia Wang, MD
• Joanna Paolilli, MD
• Dana M. Almeida, DO
• Gary S. Rosenberg, 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