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Dr. John A. Ostuni, MD

Internal Medicine

  • (516) 379-3139

Dr. Ostuni's Overview

Dr. John A. Ostuni graduated from the SUNY Downstate Medical Center College of Medicine in 1971. He works in Freeport, NY and specializes in Internal Medicine and Endocrinology, Diabetes & Metabolism. Dr. Ostuni is affiliated with South Nassau Communities Hospital.

Dr. Ostuni's Experience

Years in Practice: 44

Dr. Ostuni's Specialties

Internal Medicine, Endocrinology, Diabetes & Metabolism

Dr. Ostuni's Education & Training

Medical School: SUNY Downstate Medical Center College of Medicine; Graduated 1971

Dr. Ostuni's Rating

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Overall Rating


  • Explains conditions & treatments
  • Takes time to answer my questions
  • Provides follow-up as needed
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Dr. Ostuni's Accepted Insurance

  • Aetna Choice POS II
  • Aetna Choice POS Open Access
  • Aetna HMO
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • BCBS Blue Card PPO
  • CIGNA Open Access Plus
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Dr. Ostuni's Office Information & Appointments

Office Locations

South Nassau Internal Medcn
South Nassau Internal Medicine Associates

155 W Merrick Rd Ste 101
Freeport, NY 11520
(516) 379-3139


Office Hours and Information

Fax: (516) 868-0683

Practice Website: Not Available

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: Yes

Monday 9:00 AM - 5:00 PM
Tuesday 9:00 AM - 5:00 PM
Wednesday 9:00 AM - 12:00 PM
Thursday 9:00 AM - 5:00 PM
Friday 9:00 AM - 5:00 PM
Saturday 9:00 AM - 12:00 PM
Sunday Closed

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Dr. Ostuni's Hospital Affiliations

Office Locations

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