Does I77.89 require prior authorization?

No, I77.89 does not require prior authorization (high confidence). Code is covered without prior authorization.

`I77.89`, Other specified disorders of arteries and arterioles

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.
For services requiring a referring/ordering physician, the claim must report the referring/ordering physician's name and NPI.

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.'
MRA is covered to evaluate blood flow in the internal carotid vessels of the head and neck.
MRA of peripheral arteries of the lower extremities is covered to determine the presence and extent of peripheral vascular disease and may substitute for conventional angiography (CA).
MRA is covered for pre-operative evaluation of patients undergoing elective abdominal aortic aneurysm (AAA) repair when it is comparable to CA for determining extent of AAA and evaluating aortoiliac occlusive disease and renal artery pathology necessary for surgical planning.

WPS-J5-L35761, Non-Invasive Peripheral Arterial Vascular Studies

A57593, Billing and Coding: Non-Invasive Peripheral Arterial Vascular Studies

A56747, Billing and Coding: Magnetic Resonance Angiography (MRA)

NGS-J6-L33627, Non-Invasive Vascular Studies

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