Iinuma said he never looked at a patient's medical records while at Aetna. He says that was Aetna protocol and that he based his decision off "pertinent information" provided to him by a nurse.

"Did you ever look at medical records?" Scott Glovsky, Washington's attorney, asked Iinuma in the deposition.

"No, I did not," the doctor says, shaking his head.

"So as part of your custom and practice in making decisions, you would rely on what the nurse had prepared for you?" Glovsky asks.

"Correct."

CNN Exclusive: California launches investigation following stunning admission by Aetna medical director