Does T40.993D require prior authorization?

No, T40.993D does not require prior authorization (high confidence). Covered without prior authorization.

`T40.993D`, Poisoning by other psychodysleptics [hallucinogens], assault, subsequent encounter

ICD-10-CM

No Prior Auth Required

Covered without prior authorization (high confidence)

This article provides billing/coding guidelines that complement Local Coverage Determination L34417 for CT of the head; consult LCD L34417 for specific coverage, coding, and documentation requirements.
Medical necessity for each test must be documented in the patient's medical record as required by LCD L35006.
All documentation must be maintained in the patient's medical record and made available to the contractor upon request; every page must be legible and include patient identification and dates of service.

Urine drug testing (UDT) and drugs-of-abuse testing are covered when reasonable and necessary per LCD L35006 and ordered on an individual patient basis by the treating clinician with medical-record documentation of medical necessity.
Patients with a documented diagnosis consistent with substance use disorder (SUD) may qualify for an exception to the standard presumptive UDT annual limits.
Allergy testing is covered when the patient has clinically significant allergic symptoms and conservative therapy has failed.
Allergy testing includes performance, evaluation, and reading of cutaneous and mucous membrane tests together with physician history (including immunologic history), physical examination, antigen selection, and interpretation of results.
Standard skin testing is the preferred method when allergy testing is necessary.
When a percutaneous or intracutaneous single test (CPT 95004 or 95024) and sequential/incremental tests (CPT 95017, 95018, 95027) are performed the same day, both code types may be reported only if they are for different allergens or for different dilutions of the same allergen.

A57473, Billing and Coding: Allergy Testing

WPS-J5-L36402, Allergy Testing

WPS-J8-L36402, Allergy Testing

NOVITAS-JH-L35006, Controlled Substance Monitoring and Drugs of Abuse Testing

A56645, Billing and Coding: Controlled Substance Monitoring and Drugs of Abuse Testing

NOVITAS-JL-L35006, Controlled Substance Monitoring and Drugs of Abuse Testing

A56612, Billing and Coding: CT of the Head