Medi Assist India — Asking for diagnosis report not recommended by doctor

Medi Assist happens to be the TPA for my corporate health insurance policy. For planning hospitalisation for my mother, they are asking for a histopath report. However, no such test was adviced by the doctor at the hospital in regards to the ailment my mother is suffering from. The doctor has adviced admission based on other tests and diagnosis which have already been provided to Mediassist. This is resulting in a delay for the pre auth request to get approved, resulting in delay in my mother's hospitalisation.