2026 ICD-10-CM Diagnosis Code F84.0Autistic disorder
ICD-10-CM Codes›F01–F99›F80-F89›F84
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
F84.0 is a billable ICD-10-CM diagnosis code for autistic disorder. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 884. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 295 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neurodevelopmental disorders.
F84.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 for payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F84.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Active infantile autism
- ADNP-related multiple congenital anomalies, intellectual disability, autism spectrum disorder
- Autism epilepsy syndrome due to branched chain ketoacid dehydrogenase kinase deficiency
- Autism spectrum disorder due to AUTS2 deficiency
- Autism spectrum disorder, epilepsy, arthrogryposis syndrome
- Autistic disorder of childhood onset
- Borderline psychosis of childhood
- Developmental delay with autism spectrum disorder and gait instability
- GRIN2B-related developmental delay, intellectual disability, autism spectrum disorder
- High-functioning autism
- Infantile autism
- Infantile psychosis
- Intellectual disability, autism, speech apraxia, craniofacial dysmorphism syndrome
- Macrocephaly, intellectual disability, autism syndrome
- Mental disorder in infancy
- Pervasive developmental disorder of residual state
- Psychosis in early childhood
- Psychosis with origin in childhood
- Residual childhood psychosis
- Residual infantile autism
- Symbiotic infantile psychosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Autism spectrum disorder
- Infantile autism
- Infantile psychosis
- Kanner's syndrome
Type 1 Excludes
- Asperger's syndrome F84.5
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
autistic F84.0
autism spectrum F84.0
with autism F84.0
Syndrome See Also: Disease;
Kanner's (autism) F84.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Autistic Disorder
a disorder beginning in childhood. it is marked by the presence of markedly abnormal or impaired development in social interaction and communication and a markedly restricted repertoire of activity and interest. manifestations of the disorder vary greatly depending on the developmental level and chronological age of the individual. (dsm-v)
Patient EducationClinical
Autism Spectrum Disorder
Autism spectrum disorder (ASD) is a neurological and developmental disorder that begins early in childhood and lasts throughout a person's life. It affects how a person acts and interacts with others, communicates, and learns. It includes what used to be known as Asperger syndrome and pervasive developmental disorders.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F84.0 to ICD-9-CMHistory
Code HistoryHistory
Questions About F84.0Overview
What is the ICD-10 code for autistic disorder?
The ICD-10-CM code for autistic disorder is F84.0 (sometimes written as F840). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is F84.0 (Pervasive developmental disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report autistic disorder on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does F84.0 group to?
When autistic disorder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 884 (organic Disturbances and Intellectual Disability), which carries a relative weight of 1.6089. Higher weights mean higher Medicare reimbursement.
Is F84.0 a CC or MCC?
CMS lists F84.0 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 295 closely related codes in its exclusion list.
What is the ICD-9 equivalent of F84.0?
Under the General Equivalence Mappings, autistic disorder converts to ICD-9-CM 299.00 (autistic disord-current) and 299.01 (autistic disord-residual). The mapping is approximate, so confirm the match fits the documentation.
Does F84.0 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: F84.0 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 (Anxiety and Other Psychiatric Disorders).
