DETROIT, MI -- A doctor accused of administering unnecessary cancer treatments to patients who were either terminal or in remission was arrested Tuesday, according to federal authorities.

A federal health care fraud complaint against Farid Fata, 48, of Oakland Township, details FBI interviews with the employees of the doctor's Michigan Hematology Oncology Centers, which has offices in Clarkston, Bloomfield Hills, Lapeer, Sterling Heights, Troy and Oak Park.

One oncologist who worked for Fata told investigators he advised a patient never to return to the offices after chemotherapy treatment was ordered even though his cancer was inactive.

The oncologist "described his work for Dr. Fata as 'living with this hell,'" according to the complaint.

Read the full complaint here.

Fata is responsible for about $24.3 million in drug infusions that he billed directly to Medicare over a two-year period, more than any other hematologist/oncologist in Michigan, according to the FBI.

The complaint also alleges instances of deliberate misdiagnosis to justify cancer treatments, administration of chemotherapy to terminal patients who would not benefit from treatment, fabricated diagnoses of anemia and fatigue to justify unnecessary hematology treatment and distribution of prescription drugs at dangerous levels.

In another bizarre and grave allegation, a male patient fell down and hit his head at one of the offices and Fata is accused of insisting that he receive his chemotherapy before be taken to the emergency room.

The patient later died of his head injury, according to the U.S. Attorney's office.

"The agents and attorneys acted with great attention to detail to stop these allegedly dangerous practices as quickly as possible," said U.S. Attorney Barbara McQuade, "and we have set up a victim hotline so that patients can access their files and get questions answered."

Patients can call the United States Attorney’s office information line at 888-702-0553.

Fata is due back in court Thursday for a 1 p.m. detention hearing.

His defense attorney Christopher Andreoff told the Associated Press the allegations came from co-workers and that it's premature to allege that Fata harmed patients.

Follow Khalil AlHajal on Twitter @DetroitKhalil or on Facebook at Detroit Khalil. He can be reached at kalhajal@mlive.com or 313-643-0527.