F84.2

Rett's syndrome

Billable / specific

F84.2 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from F84)

  • disorders of psychological development

Excludes1

Not coded here — never report together with this code.

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

Excludes2

Not included here — may be reported together when both conditions exist.

  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99) (from F84)

Code also

An additional code may be needed.

  • any associated medical condition and intellectual disabilities (from F84)

Also known as

  • Rett's disease or syndrome

Parent code

  • F84Pervasive developmental disordersHeader

Related codes

  • F84.0Autistic disorderBillable
  • F84.3Other childhood disintegrative disorderBillable
  • F84.5Asperger's syndromeBillable
  • F84.8Other pervasive developmental disordersBillable
  • F84.9Pervasive developmental disorder, unspecifiedBillable

Browse