Does R83.6 require prior authorization?

No, R83.6 does not require prior authorization (high confidence). Code is covered without prior authorization.

`R83.6`, Abnormal cytological findings in cerebrospinal fluid

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

Medical records must include history and physical notes, laboratory results, and documentation of signs and symptoms that warrant the head/neck diagnostic imaging.
Accurate HCPCS/CPT coding must be submitted to differentiate CT and MRI scans from other radiology services and to support coverage determinations.
Documentation and supporting information must be available to Medicare upon request.
Providers should check and apply Correct Coding Initiative (CCI) edits and applicable LCD guidance for correct code combinations before billing.

CT or MRI scans of the head or neck are covered when the medical record documents the scan is reasonable and necessary for diagnostic evaluation.
Coverage requires documentation supporting clinical indication such as history and physical exam findings, laboratory results, and signs or symptoms that justify the diagnostic test.
Flow cytometry is covered for examination of body fluids (including peripheral blood and cerebrospinal fluid), bone marrow, and lymphoreticular tissues (lymph nodes, tonsil, spleen).
Peripheral blood and fine needle aspirate specimens are acceptable for flow cytometry to avoid more invasive diagnostic procedures.
Coverage decisions are governed by the associated Local Coverage Determination LCD L34215 and its specific coverage criteria.

A57204, Billing and Coding: MRI and CT Scans of the Head and Neck

A57689, Billing and Coding: Lab: Flow Cytometry

Ask Backwork about documentation requirements, denial risks, or coverage in your state.