Does T46.905D require prior authorization?

No, T46.905D does not require prior authorization (high confidence). Covered without prior authorization.

`T46.905D`, Adverse effect of unspecified agents primarily affecting the cardiovascular system, 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.
When a limited or follow-up echocardiogram is performed, document the targeted cardiac problem/region and bill using the appropriate CPT code (93308 or 93321).
If the study is a screening exam, document and bill with the appropriate screening ICD-10 code; document any abnormal findings and use the resulting diagnosis for subsequent billing when applicable.

Follow-up or limited transthoracic echocardiography performed to evaluate a single specified cardiac problem or region must be billed with CPT 93308.
Limited Doppler/follow-up echocardiographic studies (for targeted velocity or gradient assessment) should be billed with CPT 93321 (e.g., tricuspid regurgitant velocity to estimate pulmonary artery systolic pressure or sequential transmitral velocity in mitral stenosis).
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.
Monitored Anesthesia Care (MAC) is medically necessary when the patient has one or more documented diagnoses listed as supporting medical necessity (e.g., F91.9, G97.81, T81.9XXA, T88.8XXA, F79) and the diagnosis is matched to the anesthesia/CPT/HCPCS procedure performed.
Use G9 anesthesia modifier to indicate need for MAC due to a history of severe or advanced cardiopulmonary disease when the proceduralist determines additional monitoring is required.
Use G8 anesthesia modifier for certain deep, complex, complicated, or markedly invasive surgical procedures when applied to anesthesia codes 00100, 00300, 00400, 00160, 00532, or 00920.

A57473, Billing and Coding: Allergy Testing

WPS-J5-L36402, Allergy Testing

NGS-J6-L33591, RAST Type Tests

A56844, Billing and Coding: RAST Type Tests

WPS-J8-L36402, Allergy Testing

NOVITAS-JH-L35049, Monitored Anesthesia Care

NGS-JK-L33591, RAST Type Tests

A57361, Billing and Coding: Monitored Anesthesia Care

NOVITAS-JL-L35049, Monitored Anesthesia Care

A59186, Billing and Coding: Magnesium

A56612, Billing and Coding: CT of the Head

A56625, Billing and Coding: Echocardiography