F84.2Billable

Rett's syndrome

Chapter
5. Mental, Behavioral and Neurodevelopmental disorders
Category
F84
Effective date
October 1, 2026

Related codes in category F84

F84Pervasive developmental disordersF84.0Autistic disorderYesF84.3Other childhood disintegrative disorderYesF84.5Asperger's syndromeYesF84.8Other pervasive developmental disordersYesF84.9Pervasive developmental disorder, unspecifiedYes

Frequently asked questions

What is ICD-10 code F84.2?

F84.2 is an ICD-10-CM diagnosis code for Rett's syndrome.

Is F84.2 a billable code?

Yes. F84.2 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is F84.2 in?

F84.2 falls under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

When did F84.2 become effective?

F84.2 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to F84.2?

F84.2 belongs to category F84, which includes 6 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.