Does O09.73 require prior authorization?

No, O09.73 does not require prior authorization (high confidence). Covered without prior authorization.

`O09.73`, Supervision of high risk pregnancy due to social problems, third trimester

ICD-10-CM

No Prior Auth Required

Covered without prior authorization (high confidence)

Enter specific test verbiage in the claim narrative field: for pre-1/1/2018 Zika rRT-PCR enter 'Zika PCR'; for pre-1/1/2018 Trioplex enter 'Zika Trioplex'; for other tests enter test-appropriate verbiage, using Part A Loop 2300/NTE or Form Locator 80 (CMS 1450) or Part B Loop 2400/SV101-7 or Item 19 (CMS 1500) as applicable.
Claims must include at least one of the specified ICD-10 diagnosis codes on the claim to support Zika-related test billing.
Laboratories must have and make available their FDA Emergency Use Authorization (EUA) for the respective test upon Noridian request.

For dates of service on or after 1/1/2018, bill Zika rRT-PCR using CPT 87662 when testing is ordered and the claim includes at least one of the listed ICD-10 diagnosis codes and testing follows FDA and CDC guidelines.
For dates of service prior to 1/1/2018, bill Zika rRT-PCR using CPT 87999 and enter 'Zika PCR' in the claim narrative field when testing is ordered and the claim includes at least one of the listed ICD-10 diagnosis codes.
For dates of service on or after 1/1/2018, bill Zika virus IgM testing using CPT 86794 when testing is ordered and the claim includes at least one of the listed ICD-10 diagnosis codes.
Bill Dengue rRT-PCR using CPT 87798 when Dengue testing is ordered and the claim includes at least one of the listed ICD-10 diagnosis codes.
Bill Chikungunya rRT-PCR using CPT 87798 when Chikungunya testing is ordered and the claim includes at least one of the listed ICD-10 diagnosis codes.
If both Dengue and Chikungunya rRT-PCR testing are performed on the same date of service, bill once using CPT 87801.

A55326, Billing and Coding: Zika Virus Testing by PCR and ELISA Methods

A57189, Billing and Coding: Serum Magnesium