Dr. Cowan works in Greenvale, NY and specializes in Cardiovascular Disease. Dr. Cowan is affiliated with Mount Sinai Medical Center, Saint Francis Hospital The Heart Center, South Nassau Communities Hospital and St John's Episcopal Hospital.


Years Experience: Not Available

Procedures Performed

Dr. Cowan's Specialties

Dr. Cowan's Education & Training

Medical School
Not Available


  • Overall Rating

  • Rate
    Explains conditions & treatments

  • Rate
    Takes time to answer my questions

  • Rate
    Provides follow-up as needed

Dr. Cowan's Accepted Insurance

Please verify insurance information directly with your doctor's office as it may change frequently.

Insurance Plans

  • Aetna Choice POS II
  • Aetna Elect Choice EPO
  • Aetna HMO
  • Aetna Managed Choice POS Open Access
  • Aetna NYC Community Plan

Dr. Cowan's Office Information & Appointments


George A Petrossian Md

2200 Northern Blvd Ste 112
Greenvale, NY 11548

Get Directions

Tel: (516) 484-6777

Fax: (516) 484-0037

Practice Website: Stfrancisheartcenter.chsli.org

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: Yes

M 9:00 AM - 5:00 PM
T 9:00 AM - 5:00 PM
W 9:00 AM - 5:00 PM
T 9:00 AM - 8:00 PM
F 9:00 AM - 5:00 PM
S Closed
S Closed

Other Physicians in Dr. Cowan's Practice