Does G44.021 require prior authorization?

No, G44.021 does not require prior authorization (high confidence). Covered without prior authorization.

`G44.021`, Chronic cluster headache, intractable

ICD-10-CM

No Prior Auth Required

Covered without prior authorization (high confidence)

To bill for these (denied) procedures, providers must report CPT code 64999 for both trial and permanent electrode-array insertions and indicate whether the procedure is a trial or permanent in the claim narrative/comment field adjacent to CPT 64999.
For Part B claims enter 1 unit of service (UOS) and include the text 'Peripheral Nerve Field Stimulation', 'PNFS', 'Peripheral Subcutaneous Field Stimulation', or 'PSFS' adjacent to CPT 64999 and whether the procedure is permanent or trial in the comment/narrative field (e.g., Loop 2400 or SV101-7 for 5010A1 837P; Item 19 for paper claims).
For Part A claims enter 1 UOS and include the text 'Peripheral Nerve Field Stimulation', 'PNFS', 'Peripheral Subcutaneous Field Stimulation', or 'PSFS' adjacent to CPT 64999 and whether the procedure is permanent or trial in the comment/narrative field (e.g., Line SV02-7 for 837I electronic claims; Block 80 on the UB-04 form).

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.
C79.49 Secondary malignant neoplasm of other parts of nervous system
C79.51 Secondary malignant neoplasm of bone
C79.70 - C79.72 Secondary malignant neoplasm of adrenal gland
C79.82 Secondary malignant neoplasm of genital organs [prostate]

AMBETTER-CP.VP.63, Visual Field Testing

AETNA-CPB-0100, Cryoablation

A55530, Billing and Coding: Peripheral Nerve Stimulation

A56612, Billing and Coding: CT of the Head

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

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