Does T59.3X4A require prior authorization?

No, T59.3X4A does not require prior authorization (high confidence). Covered without prior authorization.

`T59.3X4A`, Toxic effect of lacrimogenic gas, undetermined, initial 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.
Claims must follow the complementary Local Coverage Determination (LCD L34430) and, when CPT 97000–97799 are used by PT/OT, must include documentation that the services meet the coverage and documentation requirements for physical or occupational therapy.
Follow LCD L35434 for reasonable and necessary requirements and supporting medical documentation for oximetry services.

Therapeutic procedures whose principal aim is to treat a respiratory impairment must be billed using HCPCS codes G0237, G0238, or G0239.
Therapeutic respiratory procedures (HCPCS G0237, G0238, G0239) using an individualized physical conditioning and exercise program with breathing techniques are covered for patients with documented activity limitations.
Pulmonary function tests (PFTs) represented by CPT codes 94070, 94200, 94640, 94726, 94727, and 94729 are covered when reasonable and medically necessary with supporting clinical documentation and a written order by a physician or appropriate NPP.
Spirometry (CPT 94010, 94011, 94012, 94060, 94070, 94150, 94200, 94375, 94726, 94727) is covered when clinically indicated and documented in the medical record.
Lung volume determination (CPT 94013, 94726, 94727, 94728) and diffusion capacity testing (CPT 94729) are covered when medically necessary and documented.
Pulmonary stress testing (CPT 94617, 94618, 94619, 94621) is covered when clinically indicated and supported by the medical record.

NOVITAS-JH-L35434, Oximetry Services

NOVITAS-JL-L35434, Oximetry Services

A57205, Billing and Coding: Oximetry Services

A56612, Billing and Coding: CT of the Head

A56717, Billing and Coding: Respiratory Therapy (Respiratory Care)

A57224, Billing and Coding: Respiratory Care