Does G04.91 require prior authorization?

No, G04.91 does not require prior authorization (high confidence). Covered without prior authorization.

`G04.91`, Myelitis, 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.

Compounded medications for use in implantable infusion pumps may be covered by Medicare when their use meets all other criteria for services provided incident to a physician's service.
True off-the-shelf (non‑compounded) drugs used without compounding and administered via DME may be billed using the drug-specific HCPCS code and are reimbursed under CMS ASP methodology.
If Prialt® is implanted as a single agent in the pump, bill using HCPCS code J2278-KD.
Compounded single-agent or combination drug formulations used in implanted infusion pumps must be billed using HCPCS code J7999-KD for reimbursement.
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.

CGS-J15-L34056, Urodynamics

J15

CGS-J15-L34394, Visual Fields Testing

J15

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

J15

CGS-J18-L34056, Urodynamics

J18

CGS-J18-L34394

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