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ICD-10-CM 2027

ICD-10 code for autism

F84.0

Autistic disorder

✓ Billable / specificCC — complication/comorbidity

Confirmed by the official ICD-10-CM index entry “autism, autistic (childhood) (infantile)”. Page updated September 29, 2026.

About coding autism

The ICD-10-CM code for autism is F84.0 (Autistic disorder). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F84.0.

It is also searched as ASD.

Within F84 (pervasive developmental disorders), F84.0 is specifically for Autistic disorder. Related codes cover Rett's syndrome (F84.2), other childhood disintegrative disorder (F84.3), Asperger's syndrome (F84.5), other pervasive developmental disorders (F84.8) and pervasive developmental disorder, unspecified (F84.9).

Don't report F84.0 together with the conditions in its Excludes1 note: Asperger's syndrome (F84.5).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

Related Autism codes

  • F84.2 Rett's syndrome
  • F84.3 Other childhood disintegrative disorder
  • F84.5 Asperger's syndrome
  • F84.8 Other pervasive developmental disorders
  • F84.9 Pervasive developmental disorder, unspecified

Don't confuse with (Excludes1 for F84.0)

  • Asperger's syndrome (F84.5)

Common questions about autism ICD-10 codes

What is the ICD-10 code for autism?

F84.0 — Autistic disorder. More specific codes apply when the documentation supports them: F84.2, F84.3, F84.5, F84.8 and others below.

What is the ICD-10 code for rett's syndrome?

F84.2 — Rett's syndrome.

What is the ICD-10 code for other childhood disintegrative disorder?

F84.3 — Other childhood disintegrative disorder.

What is the ICD-10 code for asperger's syndrome?

F84.5 — Asperger's syndrome.

What is the ICD-10 code for other pervasive developmental disorders?

F84.8 — Other pervasive developmental disorders.

What is the ICD-10 code for pervasive developmental disorder, unspecified?

F84.9 — Pervasive developmental disorder, unspecified.

Is F84.0 billable?

Yes. F84.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F84.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F84.0 as a principal diagnosis.

Is F84.0 a CC or MCC?

F84.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.