Does I63.20 require prior authorization?

No, I63.20 does not require prior authorization (high confidence). Code is covered without prior authorization.

`I63.20` — Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

When billing these procedures after carotid endarterectomy, include the surgery date and the phrase 'carotid endarterectomy' in the claim narrative.
When reporting a reduced (unilateral/limited) service, append modifier -52 and include an explanation of the reduced service in Item 19 of the CMS-1500 form or electronic equivalent; any appropriate supporting documentation may be submitted with the claim.
Follow Novitas LCD L35397 for the reasonable and necessary documentation requirements and frequency limitations, and consult NCCI edits for correct coding combinations prior to billing Medicare.
All documentation must be maintained in the patient's medical record and made available to the contractor upon request; every page must be legible and include patient identification and dates of service.

Non-invasive cerebrovascular arterial studies are covered when reasonable and necessary as defined by Novitas Local Coverage Determination (LCD) L35397.
Duplex post-interventional follow-up studies (typically limited and unilateral) are covered for evaluation after cerebrovascular intervention.
Vascular studies performed after carotid endarterectomy are covered when the claim includes the procedure date and the narrative 'carotid endarterectomy.'
Continuous intraoperative neurophysiologic monitoring provided one-on-one in the operating room (CPT 95940) is covered when it supports the covered indications in LCD L35003.
Report continuous intraoperative neurophysiologic monitoring in the operating room (95940) in addition to monitoring services provided from outside the operating room (G0453); coverage includes interpretation of baseline studies and removal of electrodes at the end of the procedure when supporting the LCD indications.
Reimbursement may be made for covered intraoperative monitoring when performed at POS 19, POS 21, POS 22, or POS 24.

L34623 — Intraoperative Neurophysiological Testing

J05

A57597 — Billing and Coding: Somatosensory Testing

J05

A57604 — Billing and Coding: Intraoperative Neurophysiological Testing

J05

L34624 — Somatosensory Testing

J05

L34615 — Visual Fields

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