Does G04.39 require prior authorization?

No, G04.39 does not require prior authorization (high confidence). Covered without prior authorization.

`G04.39`, Other acute necrotizing hemorrhagic encephalopathy

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.
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.
Molecular syndromic infectious disease panels are covered when billed with the appropriate proprietary CPT®/PLA code (or CPT® 87999 if no specific code exists) and accompanied by ICD-10-CM diagnosis codes that support medical necessity documented in the patient record.

CGS-J15-L34394, Visual Fields Testing

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CGS-J15-L39038, MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

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CGS-J18-L34394, Visual Fields Testing

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CGS-J18-L39038, MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

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