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title: "Mark Ratain | Oncology, Hematology, and Internal Medicine Expert Witness | Deep Research and Background Information on Experts"
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  "og:description": "Mark Jeffrey Ratain is an expert witness in Oncology, Hematology, and Internal Medicine. View detailed background information and comprehensive legal research data."
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  description: "Mark Jeffrey Ratain is an expert witness in Oncology, Hematology, and Internal Medicine. View detailed background information and comprehensive legal research data."
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### **Results for: ** Mark Jeffrey Ratain

# **Mark Jeffrey Ratain**

Oncology, Hematology, Internal Medicine

Chicago,, Illinois

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Expert Details

Dr. Mark J. Ratain, M.D. is a hematology and oncology expert witness from Illinois. He completed his A.B. in 1976 from Harvard University and then earned his M.D. in 1980 from Yale University School of Medicine. He further completed his residency from Johns Hopkins University and his fellowship from the University of Chicago. He has a physician’s license from the state of Illinois and is certified by the American Board of Internal Medicine.