Does G51.33 require prior authorization?

No, G51.33 does not require prior authorization (high confidence). Code is covered without prior authorization.

`G51.33` — Clonic hemifacial spasm, bilateral

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

Medical record must document medical necessity, relevant history, physical exam, and results of pertinent diagnostic tests supporting botulinum toxin use and must reference the covered diagnosis.
For spastic conditions other than upper/lower-limb spasticity, blepharospasm, hemifacial spasm, cervical dystonia or other focal dystonias, documentation must state unresponsiveness to conventional treatment and include dosage, injection site(s), frequency, EMG necessity (if used), and effectiveness.
Claims must report referring/ordering physician name and NPI when required by the service, and a valid ICD-10-CM code that best describes the treated condition must be present on the claim.
Documentation must show exact drug dosage administered, reason for unavoidable wastage, and amount discarded; split-vial use must document amounts given to each patient and pro rata wastage calculation details.

Botulinum toxin injections are covered for limb spasticity, including upper- and lower-limb spasticity, when medically necessary.
Botulinum toxin injections are covered for blepharospasm when medically necessary.
Botulinum toxin injections are covered for hemifacial spasm when medically necessary.
Botulinum toxin injections are covered for cervical dystonia when medically necessary.
Botulinum toxin injections are covered for other focal dystonias when medically necessary.
Electromyography (EMG) guidance for injection needle placement is covered when medically necessary and billed with appropriate CPT codes (e.g., 95873; 95874 when not billed with 95873).

A57474 — Billing and Coding: Botulinum Toxin Type A & Type B

J05

A59808 — Billing and Coding: Botulinum Toxin Injections

J05

L39908 — Botulinum Toxin Injections

J05

L34635 — Botulinum Toxin Type A & Type B

J05

A57478 — Billing and Coding: Nerve Conduction Studies and Electromyography

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