Does T63.421D require prior authorization?

No, T63.421D does not require prior authorization (high confidence). Code is covered without prior authorization.

`T63.421D` — Toxic effect of venom of ants, accidental (unintentional), subsequent encounter

ICD-10-CM

No Prior Auth Required

Code is covered without prior authorization (high confidence)

Maintain all documentation in the patient's medical record and make it available to the contractor upon request.
Every page of the medical record must be legible and include patient identification information (e.g., full name, dates of service).
The medical record must include the legible signature of the physician or non-physician practitioner responsible for and providing the care.
The submitted medical record must support the selected ICD-10-CM code(s) used for billing.

Allergen immunotherapy is covered only when it meets the reasonable and necessary requirements specified in Local Coverage Determination (LCD) L36240.
Allergy testing is covered when the medical record documents a history indicating the possible presence of allergy and the clinician selected a minimal number of tests/antigens based on patient-specific history and physician examination.
Allergy testing is covered when the medical record documents the test(s) used, the interpretation(s), and objective measurement of reaction size (wheal and erythema in mm) or a standardized in vivo grading system.
RAST type tests are covered when medically necessary and supported by the related Local Coverage Determination (LCD) and current medical literature or standards of practice.
An ECG is covered when the result is relevant to the management, diagnosis, or treatment of the patient.
A separate ECG on the same day as a cardiac stress test is payable only when it provides additional clinically necessary information beyond the stress test (e.g., to rule out acute myocardial infarction prior to performing the stress test).

L40195 — Allergen Immunotherapy (AIT) with Subcutaneous Immunotherapy (SCIT)

J05

A57472 — Billing and Coding: Allergy Immunotherapy

J05

L36408 — Allergen Immunotherapy (AIT) with Subcutaneous Immunotherapy (SCIT)

J05

A56844 — Billing and Coding: RAST Type Tests

J06

L33591

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