Does G93.40 require prior authorization?

No, G93.40 does not require prior authorization (high confidence). Covered without prior authorization.

`G93.40`, Encephalopathy, unspecified

ICD-10-CM

No Prior Auth Required

Covered without prior authorization (high confidence)

The patient's medical record must contain documentation that fully supports the medical necessity for the visual fields testing in accordance with the applicable LCD.
Documentation should include relevant medical history, a physical examination, and results of pertinent diagnostic tests or procedures supporting the need for visual fields testing.
The diagnosis code(s) reported on the claim must best describe the patient's condition for which the visual fields testing was performed.
Refer to NCCI and OPPS requirements prior to billing Medicare to ensure coding compliance and to determine any bundling or packaging edits.

Visual field testing is covered when billed to the Part A or Part B MAC with a valid ICD-10-CM diagnosis code that best describes the patient’s condition and when the service is reasonable and necessary.
For diagnostic visual field tests, report the test result on the claim if known; if the result is not known, report the signs or symptoms that prompted the test.
If the service requires a referring/ordering physician, include the ordering/referring physician’s name and NPI on the claim.
Ambulatory EEG is covered for diagnostic evaluation when seeking to detect clinical seizures or interictal epileptiform activity.
Ambulatory EEG is covered for pre-surgical evaluation to localize seizure onset when capture of multiple seizures is needed for surgical planning.
Ambulatory EEG is covered for routine follow-up monitoring of known seizure disorder or previously identified epileptiform activity.

CGS-J15-L34394, Visual Fields Testing

J15

CGS-J18-L34394, Visual Fields Testing

J18

NGS-J6-L33574, Visual Fields Testing

NGS-J6-L35074, Heavy Metal Testing

A57030, Billing and Coding: EEG Ambulatory Monitoring

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