Summary

Dr. Leonidas Diamantopoulos is an oncology specialist with additional expertise in internal medicine. He earned his medical degree from the University of Ioannina Medical School and brings a decade of clinical experience to his practice. His dual specialization allows him to provide comprehensive care for cancer patients while managing their overall health needs.

Dr. Diamantopoulos practices at multiple respected medical facilities, including Mayo Clinic Hospital Saint Marys Campus and Mayo Clinic in Rochester, Minnesota, as well as Staten Island University Hospital and Staten Island University Hospital South in Staten Island, New York. He treats patients with various blood pressure conditions, including hypertensive emergencies and both adult and pediatric hypertension. His clinical work includes performing essential diagnostic procedures such as complete blood counts and comprehensive metabolic panels to monitor patient health and guide treatment decisions.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 10 years of experience
  • 24 insurance plans accepted
  • University Of Ioannina Medical School
  • 2 specialties
  • 2 areas of expertise
  • 5 hospital affiliations
  • 4 office locations
  • Male

Office Locations

Dr. Leonidas Nikolaos Diamantopoulos has 4 locations

Mayo Clinic Hospital Saint Marys Campus

1216 2nd St SwRochester, MN 55902

Mayo Clinic

200 1st St SwRochester, MN 55905
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Staten Island University Hospital

475 Seaview AveStaten Island, NY 10305

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Dr. Leonidas Nikolaos Diamantopoulos
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Dr. Leonidas Nikolaos DiamantopoulosDr. David Michael Nanus, MDSahil D. Doshi, MDThomas J. Ow, MD
OncologyOncologyOncologyOncology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.8 
10 Years of Experience 44 Years of Experience 7 Years of Experience 22 Years of Experience
No Virtual Visit Option Virtual Visit Available No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English
Staten Island , NYNew York , NYNew York , NYNew York , NY
Med School: University Of Ioannina Medical School Med School: Chicago Medical School At Rosalind Franklin University-Medicine & Sciences Med School: Perelman School Of Medicine At University Of Pennsylvania Med School: Northwestern University Feinberg School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Leonidas Nikolaos Diamantopoulos

  • 1199SEIU
  • AARP
  • Aetna
  • AmeriGroup
  • Anthem Blue Cross
  • Blue Cross Blue Shield
  • CareSource
  • Cigna
  • EmblemHealth
  • Health Choice Arizona
  • HealthPartners
  • HealthPartners - Medicaid (Managed)
  • Humana
  • Humana - HMO
  • Humana - Medicare (Advantage HMO)
  • MagnaCare
  • Medicaid
  • Medicaid - Medicaid (Managed)
  • Meritain Health
  • MetroPlus Health Plan
  • Sanford Health Plan
  • Tricare
  • UnitedHealthcare
  • VillageCareMax

Medical Specialties

Dr. Leonidas Nikolaos Diamantopoulos has the following 2 specialties

Specialty Expertise

Dr. Leonidas Nikolaos Diamantopoulos has the following 2 areas of expertise

  • Hematology/oncology
  • Internal Medicine

Certifications, License, & Education

10 Years Experience

Dr. Leonidas Nikolaos Diamantopoulos holds an expired medical license in the state of New York.

Medical License

Medical Doctor with an expired medical license in the state of New York that expired in 2026.

Education & Training

Medical School

Graduated from University Of Ioannina Medical School in 2016.

NPI Number

Dr. Diamantopoulos' NPI number is 1295358273.

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Frequently Asked Questions

How can I make an appointment with Dr. Leonidas Diamantopoulos?
You can find contact information for Dr. Leonidas Diamantopoulos here on Vitals.
Is Dr. Leonidas Diamantopoulos accepting new patients?
Dr. Leonidas Diamantopoulos is accepting new patients on Vitals. View Dr. Leonidas Diamantopoulos's profile on Vitals to make an appointment.
Where is Dr. Leonidas Diamantopoulos's office located?
Dr. Leonidas Diamantopoulos's office is located at 375 Seguine Ave, Staten Island, NY, 10309.
Does Dr. Leonidas Diamantopoulos accept my insurance?
You can see the insurance plans that Dr. Leonidas Diamantopoulos accepts on their Vitals profile.
Does Dr. Leonidas Diamantopoulos accept virtual/telehealth appointments?
Dr. Leonidas Diamantopoulos has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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