Dr. Leonard Mark KleinJr , MD

Internal Medicine , Hematology/Oncology and Medical Oncology

(847) 827-9060

Illinois Cancer Specialists
8915 W Golf Rd Fl 2
Niles, IL 60714


Dr. Klein hails from New York City. He completed his medical school training at State University of New York at Buffalo, where he received awards for excellence in internal medicine. Dr. Klein completed his residency in Internal Medicine at Parkland Memorial Hospital in Dallas, Texas and a Fellowship in Hematology/Oncology at Barnes Hospital in St. Louis. He has also completed a fellowship in Medical Oncology at the City of Hope National Medical Center in Duarte, California. Dr. Klein has been in private practice in Cancer Care & Hematology Specialists of Chicagoland with special interests in the treatment of Hematological malignancies with experience in autologous and allogenic blood and bone marrow transplants. His many honors include the Gibson Anatomical Society in 1972, Junior AGA in 1974, Philip P. Sanger Award for excellence in Internal Medicine and the Alumni Award for excellence in clinical clerkships. Dr. Klein is married with two sons and in his spare time enjoys sports, music and travel.

Gender: N/A

Years in Practice: 41 Years

Languages Spoken: English , Polish and Spanish

Education & Training

Medical School: University At Buffalo State University Of New York School Of Medicine & Biomedical Sciences

Graduation Date: in 1978

Specialties & Hospital Affiliations

Hospital Affiliations:

  • Advocate Lutheran General Hospital
  • Northwest Community Hospital

Specialties: Internal Medicine , Hematology/Oncology and Medical Oncology

Health Insurance and Affiliations

  • Aetna Choice POS II
  • Aetna HMO
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • BCBS Blue Card PPO
  • BCBS IL Blue Precision HMO
  • BCBS IL BlueCare Direct
  • BCBS IL BlueChoice Select
  • CIGNA Open Access Plus
  • Coventry HealthAmerica PPO
  • Coventry IL PPO
  • Coventry PPO Platinum
  • First Health PPO
  • Health Alliance HMO/POS
  • Health Alliance IL IA Public Mrktplace QHP Provider Directory
  • Health Alliance PPO
  • HealthLink PPO
  • Humana Choice POS
  • Humana ChoiceCare Network PPO
  • Humana National HMO
  • Humana Preferred PPO
  • Multiplan PPO
  • PriorityHealth Priority PPO
  • UHC Choice Plus POS
  • UHC Compass HMO
  • UHC Navigate HMO
  • UHC Navigate POS
  • UHC Options PPO

Dr. KleinJr's Office Information

Fax: (847) 782-7719
Website: illinoiscancerspecialists.com
Accepting New Patients: Yes
Medicare Accepted: Yes
Medicaid Accepted: Yes

Office Hours:

Mon9:00 AM-5:00 PM
Tue9:00 AM-5:00 PM
Wed9:00 AM-5:00 PM
Thu9:00 AM-5:00 PM
Fri9:00 AM-5:00 PM

View All Internal Medicine , Hematology/Oncology and Medical Oncology Specialist Doctors in Evanston, IL