2027 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 2027 (October 1, 2026 through September 30, 2027) 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 294 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 2027.
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 2027 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F84.0: its own notes plus those printed at F84 and Chapter 5. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- disorders of psychological development
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Autism spectrum disorder
- Infantile autism
- Infantile psychosis
- Kanner's syndrome
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- Asperger's syndrome (F84.5)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- any associated medical condition and intellectual disabilities
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F84.0, its category, or a range that includes it.
Excludes1 5
These codes carry an Excludes1 note naming F84.0: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 5
These codes carry an Excludes2 note naming F84.0: its condition is not part of those codes, and both may be reported when the patient has both.
- F80.1 Expressive language disorderpervasive developmental disorders (F84.-) names F84.-, which includes this code
- F80.2 Mixed receptive-expressive language disorderpervasive developmental disorders (F84.-) names F84.-, which includes this code
- F90 Attention-deficit hyperactivity disorderspervasive developmental disorders (F84.-) names F84.-, which includes this code
- F91 Conduct disorderspervasive developmental disorders (F84.-) names F84.-, which includes this code
- F94.0 Selective mutismpervasive developmental disorders (F84.-) names F84.-, which includes this code
Code First 1
These codes say to code first a condition named in the note, and F84.0 is one of the conditions named.
Use Additional Code 3
These codes say to use an additional code from the note, and F84.0 is one of the codes named.
Code Also 8
These codes say F84.0 may also be needed to fully describe the condition. The note gives no sequencing direction.
- F78.A1 SYNGAP1-related intellectual disabilityautism spectrum disorder (F84.0)
- F78.A1 SYNGAP1-related intellectual disabilityautistic disorder (F84.0)
- Q87.85 MED13L syndromeautism spectrum disorder (F84.0-)
- QA0 Neurodevelopmental disorders related to specific genetic pathogenic variantsautism spectrum disorder (F84.0)
- Z71.87 Encounter for pediatric-to-adult transition counselingautism spectrum disorder (F84.0)
- G93.45 Developmental and epileptic encephalopathypervasive developmental disorders (F84.-) names F84.-, which includes this code
- QA0 Neurodevelopmental disorders related to specific genetic pathogenic variantspervasive developmental disorders (F84.-) names F84.-, which includes this code
- Z15.1 Genetic susceptibility to epilepsy and neurodevelopmental disorderspervasive developmental disorders (F84.-) names F84.-, which includes this code
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, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 1.5998. 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 2027. 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 294 closely related codes in its exclusion list.
Can F84.0 be reported with F84.5?
Not as a rule. The Excludes1 note on F84.0 lists "Asperger's syndrome (F84.5)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
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).
