Does R21 require prior authorization?

No, R21 does not require prior authorization (high confidence). Code is covered without prior authorization.

`R21` — Rash and other nonspecific skin eruption

ICD-10-CM

No Prior Auth Required

Code is 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.
PRNT confirmatory testing, if indicated, is performed by CDC or CDC-designated labs and the PRNT test result/process is not billed to Medicare (do not submit PRNT claims).

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.

L36402 — Allergy Testing

J05

L39051 — Cosmetic and Reconstructive Surgery

J05

A58774 — Billing and Coding: Cosmetic and Reconstructive Surgery

J05

A57473 — Billing and Coding: Allergy Testing

J05

A56837 — Billing and Coding: Reduction Mammaplasty

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