F84.2

F84.2: Rett's syndrome

Billable / specific codeICD-10-CM

F84.2 is a billable, specific ICD-10-CM code for rett's syndrome. It is valid for submission on a claim.

Check F84.2 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Asperger's syndrome (F84.5)
Autistic disorder (F84.0)
Other childhood disintegrative disorder (F84.3)

Other codes that can never be billed with F84.2

Their own Excludes1 notes name this code, so the conflict is not listed above.

F84.3Other childhood disintegrative disorder

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

F84.2 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A56612Billing and Coding: CT of the Head
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

Alphabetic index entries that lead here

Rett's disease or syndrome

Code history

Unchanged in every release from FY2024 to FY2027.