Summary

Dr. John Ostuni is an endocrinologist who specializes in diabetes and metabolism, as well as internal medicine. They graduated from State University of New York Upstate Medical University and completed residency training at Nassau University Medical Center. With 55 years of clinical experience, Dr. Ostuni brings extensive knowledge to the diagnosis and management of complex hormonal and metabolic conditions.

Dr. Ostuni practices at South Nassau Internal Medicine in Freeport, New York. They focus on treating patients with Type 2 diabetes and diabetic complications, including diabetic neuropathy and peripheral nerve damage. Dr. Ostuni performs comprehensive diagnostic testing through blood work and urine analysis to monitor patient health. Patients have given them an average rating of 4.3 out of 5 stars for their care.

Overview based on verified provider data

Quick Facts

  • 4.3
  • 55 years of experience
  • 9 insurance plans accepted
  • Nassau University Medical Center
  • 3 written reviews
  • 2 specialties
  • 13 areas of expertise
  • 2 board certifications
  • 1 office location

Office Location

South Nassau Internal Medicine

155 W Merrick Rd Ste 101Freeport, NY 11520

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Dr. John A Ostuni, MDIsabel Reckson, MPHDr. Brian D. Schwartz, MDDr. Pamela U Freda, MD
Endocrinology, Diabetes & MetabolismEndocrinology, Diabetes & MetabolismEndocrinology, Diabetes & MetabolismEndocrinology, Diabetes & Metabolism
Accepts New Patients Accepts New Patients
4.3 
3.4 
4.1 
55 Years of Experience 33 Years of Experience 38 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks English Speaks English, Spanish
Freeport , NYNew York , NYNew York , NYNew York , NY
Med School: State University Of New York Upstate Medical University Med School: New York University Med School: Columbia University College Of Physicians & Surgeons
Current Profile
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Insurance Plans Accepted by Dr. John A Ostuni

  • AARP
  • Aetna
  • Blue Cross Blue Shield
  • Humana
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Oscar Health Insurance
  • UnitedHealthcare

Medical Specialties

Dr. John A Ostuni has the following 2 specialties

Specialty Expertise

Dr. John A Ostuni has the following 13 areas of expertise

  • Acromegaly
  • Addison Disease
  • Cushing Disease
  • Diabetes
  • Diabetes (Types I & II)
  • Diabetes Complications
  • Fatigue
  • Gland Issues
  • Hormones
  • Hyperthyroidism
  • Hypopituitarism
  • Hypothyroidism
  • Internal Medicine

Certifications, License, & Education

55 Years Experience

EDUCATION & TRAINING

Residency

Nassau University Medical Center

Medical School

State University Of New York Upstate Medical UniversityGraduated in 1971

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Frequently Asked Questions

Is Dr. John Ostuni accepting new patients?
Dr. John Ostuni has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
Does Dr. John Ostuni accept my insurance?
You can see the insurance plans that Dr. John Ostuni accepts on their Vitals profile.
Where is Dr. John Ostuni's office located?
Dr. John Ostuni's office is located at 155 W Merrick Rd Ste 101, Freeport, NY, 11520.
How can I make an appointment with Dr. John Ostuni?
You can find contact information for Dr. John Ostuni here on Vitals.
Does Dr. John Ostuni accept virtual/telehealth appointments?
Dr. John Ostuni has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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