
Accepting patients
Who is Dr. Gregos, Hematology / Oncology Specialist in Brooklyn, NY?
Peter Gregos, M.D., M.S. is an Assistant Professor of Medicine at Weill Cornell Medical College and an Attending Physician at NewYork-Presbyterian Brooklyn Methodist Hospital. Dr. Gregos specializes in treating patients with a wide variety of hematological (blood) disorders and cancers, with a focus in genitourinary cancers. He received a Bachelor of Science degree from Fordham University and a Master?s degree in Biomedical Science from Barry University. Dr. Gregos received his medical degree with high honors from Ross University School of Medicine. He then completed his Internal Medicine internship and residency at NewYork-Presbyterian Brooklyn Methodist Hospital where he also completed his fellowship in Hematology and Medical Oncology. Dr. Gregos was named Physician of the Year at NewYork-Presbyterian Brooklyn Methodist Hospital in 2019.
What languages does Dr. Gregos speak?
Dr. Gregos and their clinical team can communicate with patients in the following languages:
English
What conditions does a Hematology / Oncology Specialist like Dr. Gregos typically treat?
As a Hematology / Oncology Specialist, Dr. Gregos diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Gregos. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Prostate Cancer
- Prostate Cancer Treatment (PDQ®)
- Prostatic Carcinoma
- Prostate Gland Cancer
- Malignant Prostate Tumor
ICD-10 Codes:
- C61: Malignant neoplasm of prostate
Also known as:
- Iron Deficiency Anemia from Chronic Blood Loss
- Anemia
- Iron
- Anemia due to iron deficiency and blood loss
- Chronic blood loss anemia
- Low iron anemia from bleeding
- Low Red Blood Cell Count
- Low Hemoglobin
- Iron deficiency
ICD-10 Codes:
- D500: Iron deficiency anemia secondary to blood loss (chronic)
- D649: Anemia, unspecified
Also known as:
- Kidney Cancer
- Renal cancer
- Kidney carcinoma
- Renal cell carcinoma
ICD-10 Codes:
- C642: Malignant neoplasm of left kidney, except renal pelvis
- C649: Malignant neoplasm of unspecified kidney, except renal pelvis
Does Dr. Gregos accept my insurance?
Dr. Gregos accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Gregos accept in Brooklyn, NY?
Dr. Gregos in Brooklyn, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Cigna Group
Elderplan
EmblemHealth
International Brotherhood of Teamsters (IBT)
Medicare
National Benefit Fund
Service Employees International Union (SEIU)
Unknown
Visiting Nurse Service of New York
View All Insurances
Where is Dr. Gregos' office located?

Center for Community Health at NewYork-Presbyterian Brooklyn Methodist Hospital
515 6th Street
Brooklyn, NY 11215
What is Dr. Gregos's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Gregos's National Provider Identifier (NPI) number is 1447670773.
What common questions do patients ask about Dr. Gregos?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Gregos
What is Dr. Peter Gregos's specialty?
Dr. Gregos is a Hematology / Oncology Specialist near Brooklyn, NY.
What does a Hematology / Oncology Specialist do?
An internist doctor of osteopathy specializing in the combined treatment of hematology and oncology disorders. A doctor of osteopathy who is board eligible or certified by the American Osteopathic Board of Internal Medicine was previously able to obtain a Certificate of Special Qualifications in Hematology and Oncology; however, this certificate is no longer available.
Is this Dr. Peter Gregos affiliated with a ranked Castle Connolly Top Hospital?
No, Gregos is not affiliated with a Castle Connolly Top Hospital, but is affiliated with the following hospitals: Newyork-Presbyterian Brooklyn Methodist Hospital. Castle Connolly Top Hospitals are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see a Hematology / Oncology Specialist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Hematology / Oncology Specialist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Peter Gregos accepting new patients in Brooklyn, NY?
Yes, Dr. Peter Gregos is accepting new patients at this time.
Does Dr. Peter Gregos offer online booking?
Please contact Dr. Gregos's office for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Peter Gregos?
Please contact Dr. Gregos's office for information regarding telehealth appointment availability or for scheduling assistance.
Other Hematology / Oncology Specialist Near Brooklyn, NY

Dr. Brandon Swed, MD is a Hematology / Oncology Specialist, who primarily practices in Brooklyn, NY.

Center for Community Health at NewYork-Presbyterian Brooklyn Methodist Hospital
515 6th Street
Brooklyn, NY 11215

Dr. Doru Paul, MD is a Hematology / Oncology Specialist, who primarily practices in Brooklyn, NY. He is board certified.
Center for Community Health at NewYork-Presbyterian Brooklyn Methodist Hospital
515 6th Street
Brooklyn, NY 11215

Dr. Jonathan Canaani, MD is a Hematology / Oncology Specialist, who primarily practices in Brooklyn, NY.
Center for Community Health at NewYork-Presbyterian Brooklyn Methodist Hospital
515 6th Street
Brooklyn, NY 11215
Connect with DR. Gregos
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Center for Community Health at NewYork-Presbyterian Brooklyn Methodist Hospital
515 6th Street
Brooklyn, NY 11215