Does D89.89 require prior authorization?

No, D89.89 does not require prior authorization (high confidence). Code is covered without prior authorization.

`D89.89` — Other specified disorders involving the immune mechanism, not elsewhere classified

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

Claims must report the appropriate CPT code for the flow cytometry service, include 1 unit of service (UOS), and list the appropriate ICD-10-CM diagnosis code.
Medical necessity documentation per LCD L34513 is required when coverage criteria are not fully met in this billing guideline (for example, when >24 markers are requested).
All documentation must be maintained in the patient's medical record and made available to the contractor upon request.
Every page of the medical record must be legible and include patient identification information (e.g., complete name, dates of service).

Coverage and medical necessity determinations for flow cytometry are governed by Local Coverage Determination L34513.
Flow cytometry may be used to analyze cellular components of body fluids and lymphoreticular tissues, including peripheral blood, cerebrospinal fluid (CSF), bone marrow, lymph nodes, tonsil, spleen, and fine needle aspirate material.
Peripheral blood or fine needle aspirate specimens may be used to avoid more invasive diagnostic procedures when clinically appropriate.
A GIP multiplex NAAT panel (CPT 87505, 87506, 87507) may be reported when medically reasonable and necessary per Local Coverage Determination (LCD) L38227.
Gastrointestinal pathogen (GIP) multiplex NAAT panels (CPT 87505, 87506, 87507) are covered when reasonable and necessary in accordance with LCD L38229.
Billing and coding for intravenous immunoglobulin (IVIG) should follow the Local Coverage Determination (LCD) L34580 and the billing/coding guidelines in this article as a complement to that LCD.

L39044 — MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

J05

A58761 — Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

J05

A58963 — Billing and Coding: Multiplex Gastrointestinal Pathogen Panel (GPP) Tests for Acute Gastroenteritis (AGE)

J06

A60186 — Billing and Coding: Off-label Use of Rituximab and Rituximab Biosimilars

J06

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