HEALTH ALERT! If you have any of the following, please call our office before coming in for your appointment: Fever AND cough; Fever OR cough and recent travel (domestic or international to any destination); Recent international travel to areas impacted by the Coronavirus (2019-nCoV) within the last 14 days; OR close contact with someone who has traveled outside the US or been exposed to the Coronavirus. Read more

Locations & Physicians

Aslam Zahir, M.D.

Hematology - Aslam Zahir, M.D.


Medical Oncology

Primary Location

Crystal Lake
360 Station Dr., Suite 201
Crystal Lake, IL 60014

Main Phone:

View Location Information


Internal Medicine, St. Joseph Hospital, Chicago IL


Hematology and Oncology, Medical College of Wisconsin, WI

Hospital Affiliations

Sherman Hospital, Elgin
Presence St. Joseph Hospital, Elgin
Northwestern Medicine McHenry Hospital
Northwestern Medicine Woodstock Hospital
St. Alexius Medical Center, Hoffman Estates
Mercy Harvard Hospital, Harvard

Board Certified


Dr. Zahir is actively involved in conducting clinical research trials and teaching. He is a chairman of the Cancer Care Committee at Memorial Medical Center in Woodstock, and Northern Illinois Medical Center in McHenry. He also serves as the Clinical Investigator at Sherman Hospital. Dr. Zahir treats patients with a variety of malignancies and benign hematologic disorders.