Does K90.821 require prior authorization?

No, K90.821 does not require prior authorization (high confidence). Code is covered without prior authorization.

`K90.821` — Short bowel syndrome with colon in continuity

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

This billing and coding guidance complements Local Coverage Determination L34434; follow LCD L34434 for clinical coverage criteria and required documentation for claims.
All services billed with unlisted procedure codes must include sufficient medical records and supporting documentation to allow development and medical review.
The submitted medical record must support the selected ICD-10-CM code(s), and the submitted CPT/HCPCS code must accurately describe the service performed.
The medical record must include the legible signature of the physician or non-physician practitioner responsible for and providing the care.

For tests that currently lack specific CPT codes (functional intracellular analysis and total antioxidant function), bill using CPT 84999 and add a note identifying which test was performed in the Remarks area for Part A claims and the Narrative area for Part B claims.
Coverage and reasonable/necessary determinations for assays for vitamins and metabolic function are governed by LCD L34914 and claims must meet that LCD's requirements to be covered.
Colonoscopy/sigmoidoscopy/proctosigmoidoscopy is covered for surveillance of colonic neoplasia in patients with a history of colorectal cancer or colonic polyps.
A follow-up procedure is covered 1 year after surgery for treatment of colorectal cancer when the patient is identified as high-risk for colon cancer and is eligible for continued screenings.
25-hydroxy vitamin D testing (including fractions, if performed) is covered when deemed reasonable and necessary per Local Coverage Determination L33771.
Vitamin D assay testing is payable under Medicare Part B when performed in an office (POS 11), independent clinic (POS 49), Federally Qualified Health Center (POS 50), or independent laboratory (POS 81).

A57484 — Billing and Coding: Vitamin D Assay Testing

J05

L34658 — Vitamin D Assay Testing

J05

A57736 — Billing and Coding: Vitamin D Assay Testing

J06

L37535 — Vitamin D Assay Testing

J06

L33771 — Vitamin D; 25 hydroxy, includes fraction(s), if performed

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