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Dr. Leonard Klein, MD

Dr. Leonard Klein, MD

Age 72 Oncology M
(10) 10 reviews
Accepting New Patients


Dr. Leonard Klein, MD is an Oncology Specialist in Niles, IL. Dr. Klein completed a residency at Barnes - Jewish Hospital. They currently practice at Illinois Cancer Specialists and are affiliated with Advocate Lutheran General Hospital. Dr. Klein is board certified in Hematology and accepts accepts multiple insurance plans.


  • City Hope National Med Center, Fellowship Hospital — 1980
  • City Hope Natl Med Ctr, Fellowship Hospital — 1980
  • Barnes - Jewish Hospital, Residency Hospital — 1979
  • Barnes Jewish Hospital, Residency Hospital — 1979
  • Parkland Memorial Hospital, Residency Hospital — 1978
  • New York State U, School of Medicine - Buffalo, Medical School — 1975

Insurance Accepted

  • Aetna
  • Anthem
  • CareFirst Blue Cross Blue Shield
  • Cigna
  • First Health
  • Galaxy Health Network
  • HAP Insurance
  • HealthLink
  • HFN
  • Humana
  • Medicare
  • MultiPlan
  • National Provider Network
  • Preferred Network Access
  • Three Rivers Provider Network

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Compare with other Oncology Specialists

Compare Dr. Klein with our nearby Oncology Specialists at Cleveland Clinic
These providers are on the medical staff of Cleveland Clinic
These providers are on the medical staff of Cleveland Clinic.

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Apr 01, 2021
Dr. Leonard Klein has been my longtime physician. He is a compassionate, brilliant doctor, caring and trustworthy. Cancer is scary for sure but when you have one of the best Cancer Specialist, that's half the battle. I can be rest assured that he is always in my corner. Whether in the hospital or in his office, the care is superb.
Constance Montgomery — Apr 01, 2021
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Leonard Klein, MD. To arrange an appointment, call the number on Dr. Klein's profile.

Dr. Leonard Klein, MD is affiliated with Advocate Lutheran General Hospital.

Yes, Dr. Leonard Klein, MD holds board certification in Hematology, Internal Medicine and Medical Oncology.

Hospital Affiliations

  • Advocate Lutheran General Hospital


  1. Illinois Cancer Specialists

    1. 1
      Illinois Cancer Specialists
      8915 W Golf Rd Fl 3, Niles, IL 60714 (847) 827-9060