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F84.2 Rett's syndrome ICD-10-CM · CMS code reference
Official ICD-10-CM description: Rett's syndrome
Coding notes From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Excludes1 Not coded together with this code. The exception is when the two conditions are unrelated to each other.
Asperger's syndrome (F84.5 ) Autistic disorder (F84.0 ) Other childhood disintegrative disorder (F84.3 ) Code also A second code may be needed. Sequencing depends on the encounter.
any associated medical condition and intellectual disabilities Common questions Is F84.2 a billable code? Yes. F84.2 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.
From the source Official description from CMS .
Code set ICD-10-CM Category F84 Pervasive developmental disorders Chapter Mental, behavioral and neurodevelopmental disorders Billable Yes Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. About BillingBrief and our sources .
