Does E84.19 require prior authorization?

No, E84.19 does not require prior authorization (high confidence). Code is covered without prior authorization.

`E84.19` — Cystic fibrosis with other intestinal manifestations

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

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.
When billing CPT 84999 for the listed tests, include a note identifying the specific test in the Remarks (Part A) or Narrative (Part B) area of the claim.
All documentation must be maintained in the patient's medical record, be legible, include patient identification (e.g., complete name) and dates of service, and be made available to the contractor upon request.

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.
Vitamin D assay testing billed to Medicare Part A or Part B MAC is covered when ordered by an authorized provider (physician or state-authorized non-physician) and the service is otherwise consistent with local coverage determination L33996.
A valid ICD-10-CM diagnosis code that best describes the patient's condition prompting the Vitamin D assay must be reported on the claim; for diagnostic tests, report the test result if known, otherwise report the presenting symptoms.
When a referring/ordering provider is required, the referring/ordering provider name and NPI must be reported on the claim.
25-hydroxy vitamin D testing (including fractions, if performed) is covered when deemed reasonable and necessary per Local Coverage Determination L33771.

A57484 — Billing and Coding: Vitamin D Assay Testing

J05

L34658 — Vitamin D Assay Testing

J05

L37535 — Vitamin D Assay Testing

J06

A57736 — Billing and Coding: Vitamin D Assay Testing

J06

A56841 — Billing and Coding: Vitamin D; 25 hydroxy, includes fraction(s), if performed

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