Does N51 require prior authorization?

No, N51 does not require prior authorization (high confidence). Code is covered without prior authorization.

`N51`, Disorders of male genital organs in diseases classified elsewhere

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

The ordering/referring practitioner's assessment related to the patient's complaint and the specific reason for the test must be documented in the medical record.
The medical record must contain a referral/order on file for each non‑invasive vascular study performed.
Results of pertinent tests and procedures performed that relate to the indication must be included in the medical record and reported on the claim if known; otherwise report the symptoms that prompted the test.
Signed and dated office visit notes and operative reports must be present in the record for the services ordered or rendered to Medicare beneficiaries.
Providers must maintain documentation of staff training and experience for those who perform and interpret the technical and interpretation portions of the examinations for post‑payment audit.
When expecting Medicare denial due to medical necessity, an Advance Beneficiary Notice (ABN) Form CMS‑R‑131 should be signed and retained and the correct denial modifier (GA/GX/GZ/GY) reported per CMS instruction; for Part A MAC include occurrence code 32 and the ABN date.

Non-invasive vascular diagnostic tests are covered when ordered by the treating practitioner or a consulting physician who will use the results to manage the beneficiary's specific medical problem.
A documented referral/order must be on record for each individual non-invasive vascular study performed for coverage to apply.
Cerebrovascular arterial duplex follow-up is covered annually for stenosis 20–49% (diameter reduction).
Cerebrovascular arterial duplex follow-up is covered every six months for stenosis 50–79% (diameter reduction).
Cerebrovascular arterial duplex follow-up is covered every six months for stenosis 80–99% if surgical correction has not been performed.
After carotid endarterectomy, repeat ipsilateral (unilateral) duplex examinations are allowable at approximately six weeks, six months, and one year post‑procedure during the first year.

CGS-J15-L34045, Non-Invasive Vascular Studies

J15

CGS-J18-L34045, Non-Invasive Vascular Studies

J18

A57591, Billing and Coding: Non-Invasive Abdominal / Visceral Vascular Studies

WPS-J5-L35755, Non-Invasive Abdominal / Visceral Vascular Studies

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