Understanding the F84.0 Diagnosis: Your Child’s Future & Health

For many families, having a child receive a F84.0 diagnosis code, autism spectrum disorder, can be a defining moment, marking the start of a journey filled with both challenges and opportunities. This diagnostic code serves as a cornerstone in understanding and addressing the unique needs of individuals affected by this condition. Understanding the diagnosis is the starting point for parents and caregivers on a new journey for knowledge, support, and resources to best support their loved ones on their developmental journey.

Children may be referred to diagnosticians for a comprehensive psychological evaluation for various reasons. This referral could stem from parental concerns, recommendations from educational professionals, or referrals from physicians.

Throughout the evaluation process, physicians or other qualified practitioners conduct assessments to ascertain whether individuals meet diagnostic criteria for various medical conditions, including a diagnosis of F84.0, autism spectrum disorder. These assessments involve direct interaction with the children, supplemented by information gathered from parent/caregiver questionnaires and, where feasible, input from the children themselves.

After the direct evaluations, the family will receive a comprehensive written report summarizing the assessments conducted, the results obtained, a formal diagnosis (if applicable), and treatment recommendations. This report is typically provided at the conclusion of the assessment period, often two weeks from the initial testing date.

F84.0, autism spectrum disorder, is diagnosed if individuals demonstrate persistent deficits in social communication and social interaction as well as restricted, repetitive patterns of behavior, interest, or activities.

While a diagnosis of autism can initially feel overwhelming, it is important to remember that the diagnosis opens doors to a vast network of support, resources, and professionals available to assist families. A diagnosis allows physicians to make matching treatment recommendations and grants individuals with the diagnosis access to early intervention services that may require a formal diagnosis for admittance as well as insurance coverage.

Decoding F84.0

The International Classification of Diseases (ICD), a globally recognized system for classifying diseases and health conditions maintained by the World Health Organization (WHO), first added an official diagnosis of autism in the ICD-10 in 1994. The Diagnostic and Statistical Manual of Mental Disorders (DSM), added ASD as an official diagnosis in the DSM-III in 1980, to be most recently updated in the DSM-5, released in 2013.

The most recent edition of the DSM, DSM-5, released in 2013, introduced changes to the F84.0 diagnosis. Most notable are a unified diagnosis – merging several previously separate diagnoses (Autistic Disorder, Asperger’s Disorder, Childhood Disintegrative Disorder, and Pervasive Developmental Disorder- Not Otherwise Specified) into a single diagnosis of Autism Spectrum Disorder (F84.0, ASD), a criteria revision (research-based diagnostic criteria now better reflects the spectrum nature of the disorder), introduction of specifiers (Level 1: Requiring Support, Level 2: Requiring Substantial Support, and Level 3: Requiring Very Substantial Support), inclusion of sensory activities as potential symptoms of ASD, and the reduction of the onset criteria (previously stating that symptoms needed to be present before the age of 3, now stating that symptoms must be present in the early developmental period, even if they do not fully manifest until later).

The most recent edition of the ICD, ICD-11, released by WHO in 2018, included similar revised criteria for a diagnosis, subclassification of severity aligned with the DSM (Level 1, Level 2, Level 3), and alignment with the DSM-5 criteria for an autism diagnosis.

Autism spectrum disorder falls in a category of disorders in the DSM called neurodevelopmental disorders, a group of conditions that typically start early in the developmental period for a child. While neurodevelopmental disorders frequently co-occur, an ASD diagnosis is not a learning disorder or an intellectual developmental disorder.

To meet the diagnostic criteria for F84.0, five outlined criteria must be met. These include:

  1. Persistent deficits in social communication and social interest

  2. Restricted, repetitive patterns of behavior, interests, or activities

  3. Symptoms that are present in early childhood (no longer required before the age of 3)

  4. Symptoms that cause clinically significant impairment in social, occupational, or other important areas of current functioning

  5. Symptoms that are not better explained by a diagnosis of another disability or developmental delay

With the criteria revision in the DSM, looking at autism as a spectrum, the first two criteria tend to vary in severity across diagnosed individuals, leading to the different Levels (or specifiers) associated with support provided. Deficits in the first area (social communication and social interest) are based on reference to the behavior of similar-aged peers. In some children, this can be observed through infrequent use or comprehension of gestures, in others, deficits in social communication and social interest can be observed through failure to understand or act in a variety of social settings.

Similar to the spectrum of differences with social deficits, the second category of restricted, repetitive patterns of behavior, interests, or activities also varies across individuals. One child may engage in stereotypical behavior such as flapping their hands or repeating phrases or lines from their favorite TV show or song. Another child may sequence toy cars in an obvious pattern or pattern undetectable to others, and have a meltdown if the order is disturbed or a specific item is missing. A third individual may have a fixation on a specific topic and talk incessantly about the topic to anyone who will listen.

Change to ICD/DSM Codes and ASD

F84.0 diagnosis is often the beginning of a lifelong journey

The diagnostic code for autism spectrum disorder, whether diagnosed in a country that uses the International Classification of Diseases (ICD) or in the Diagnostic and Statistical Manual of Mental Disorders (published by the American Psychiatric Association (APA) and used widely, not just restricted to the United States), is the same, F84.0

In the United States, children typically receive their diagnoses through the DSM. While the ICD also includes the F84.0 code for autism spectrum disorders, in the context of clinical practice in the United States, diagnoses of ASD are commonly made using the diagnostic criteria outlined in the DSM. The DSM is widely used by mental health professionals in the United States for the diagnosis of mental disorders, including ASD.

Whether diagnosed through the ICD or DSM, obtaining a correct diagnosis for a child in the United States is crucial for ensuring access to comprehensive medical coverage, appropriate treatment options, and essential educational services. Medical interventions and therapies including different therapies (expanded on below in the Treatment and Management section) and medical assessments can be costly. A correct diagnosis facilitates reimbursement for these services through health insurance plans, Medicaid, or other healthcare programs.

While a formal diagnosis is beneficial for treatment coverage for any diagnosis, with ASD, early intervention is crucial for maximizing developmental outcomes. A timely and accurate diagnosis allows families to access early intervention programs and therapeutic services proven to be effective in promoting the child’s development and well-being.

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The Diagnostic Process

Comprehensive diagnostic evaluations can be conducted upon recommendation from a child’s pediatric physician, school personnel, or at the family’s request. The evaluations involve multiple steps and may vary depending on the healthcare provider and the specific resources available. The process typically includes an initial screening to identify potential signs or symptoms of ASD. This can be a questionnaire or interview with the parents, caregivers, teachers, or other individuals who have regular interactions with the child.

If the initial screening suggests the possibility of ASD, a comprehensive direct assessment is conducted by a multidisciplinary team of practitioners (e.g., psychologists, pediatricians, psychiatrists). The assessments are commonly comprised of interviews with parents/ caregivers, a direct observation, standardized assessments, developmental and cognitive assessments, and an assessment of sensory behavior.

To meet the diagnostic criteria for ASD, practitioners are required to complete specific assessments. ASD-specific assessments include:

  • Autism Diagnostic Observation Schedule – Second Edition (ADOS-2)

  • Autism Diagnosis Interview-Revised (ADI-R)

  • Autism Spectrum Rating Scale (ASRS)

  • Social Responsiveness Scale – Second Edition (SRS-2)

  • Childhood Autism Rating Scale – Second Edition (CARS-2)

  • Gilliam Autism Rating Scale – Second Edition (GARS-2)

  • Monteiro Interview Guidelines for Diagnosing the Autism Spectrum, Second Edition (MIGDAS-2)

Other developmental screening tools are frequently administered by pediatricians to screen for ASD, but these tools alone cannot be used to make a diagnosis of F84.0. These can include:

  • Ages and Stages Questionnaires (ASQ)

  • Modified Checklist for Autism in Toddlers (MCHAT)

  • Communication and Symbolic Behavior Scales (CBS)

  • Screening Tool for Autism in Toddlers and Young Children (STAT)

  • Parents’ Evaluation of Developmental Status (PEDS)

Along with the assessments, a medical evaluation is commonly done to rule out other medical conditions that can present with similar symptoms to identify comorbid diagnoses. This may involve a physical examination, genetic testing, neurological assessment, or any laboratory tests if determined to be necessary.

After the assessment pieces are complete, the practitioners review the findings and reach a diagnostic conclusion.

Steps to Take After f84.0 Diagnosis

For families that have received an autism diagnosis, the best first step to take involves education – learning about what autism spectrum disorder is, characteristics or associated behaviors, and available interventions. Families and caregivers are encouraged to seek information from reliable sources such as healthcare professionals, autism organizations, or other reputable sources.

Families and caregivers should proactively seek support and access services, whether through online resources or within their local community. Connecting with other families who have navigated the diagnostic process can offer valuable insights and practical advice based on their firsthand experiences.

Treatment and Management Strategies


Within a diagnostic report, physicians typically include a list of treatment recommendations (listed on the diagnostic evaluation report) that the families can reference for assistance moving forward. When it comes to treatment and management strategies, recommendations are made to improve the quality of life for the individual and provide access to resources to the family/ caregivers supporting the autistic individual. Please note that these recommendations listed below should only be made by your physician and are individualized for the child. While not a comprehensive list, some treatment recommendations include:

  • A referral back to a pediatrician or primary care physician for the patient. While no medication is recommended simply for a diagnosis of autism, a pediatrician or physician can provide further consultation regarding medication management for comorbid diagnosis or associated symptoms.

  • A referral to a genetics clinic can be recommended if a benefit is seen in a further medical evaluation. Some physicians include this in the section on recommendations for a genetic screening study to ensure the child’s health and allow providers to appropriately guide medical management.

  • If there are concerns with a child’s food selectivity, additional testing could be recommended for allergens, or a swallow study could be recommended to rule out any medical conditions.

  • If there are concerns with sleep routines, a referral for a sleep study could be advised.

  • Community-specific supports can be recommended such as a Family Resource Specialist, Social Worker (specific to hospital or school settings), or Case Management Services (through the local county office). Physicians can also make recommendations to different community resources that are available (e.g., Autism Society) or local waivers.

  • A referral for specific services related to a diagnosis of ASD can be made. Applied Behavior Analysis is the main behavioral treatment recommendation given by the CDC following a diagnosis of ABA. A Board Certified Behavior Analyst (BCBA) can conduct a direct assessment and make recommendations for either comprehensive (30-40 hours/ week) or focused (10-25 hours/ week) direct ABA services, provided in a 1:1 or group setting based on the child’s needs. ABA services can be provided in the home, school, clinic, or community settings.

  • Referrals for other related services such as speech, occupational therapy, or physical therapy can be made. Some community practices offer combined services in one location (e.g., both ABA and SLP services).

Educational Considerations

Diagnoses of ASD can occur before children start school, as neither the DSM nor the ICD specify a minimum age for diagnosis, though some healthcare providers prefer to wait until around 18-24 months of age or older before making a formal diagnosis to allow for more reliable observation of developmental patterns and behaviors.

For parents, it is important to be aware of compulsory education laws and the associated age or grade requirements. In the United States, most states require children to start attending school between ages 5 and 7, though this varies from state to state. In some cases, children may be exempt from compulsory education requirements due to specific circumstances, which can include medical conditions and disabilities.

If a family plans to enroll their child with an ASD diagnosis in school, educational considerations are crucial for promoting a child’s academic success, social development, and overall well-being. Parents and caregivers should team with their child’s school to determine if the child is eligible for an Individualized Education Plan (IEP) or 504 Plan. These can provide different modifications and specialized services to outline specific goals, interventions, and supports to help the child succeed both academically and socially.

Education informed by Applied Behavior Analysis (ABA) principles offers evidence-based strategies for supporting individuals diagnosed with F84.0. By employing practices grounded in ABA, such as breaking down skills into smaller components, errorless teaching, task chaining, and multiple-trial teaching, educators can effectively address the diverse learning needs of students.

Additionally, an optimal learning environment can be created through modifications such as minimizing distractions and creating structured, predictable settings. Moreover, classrooms with lower teacher-to-student ratios can further facilitate personalized instruction and support, maximizing learning opportunities for students with ASD.

Support for Parents and Families


The entire family unit surrounding a child diagnosed with autism spectrum disorder often encounters challenges and uncertainties in navigating the diagnosis and seeking support and services. However, numerous resources and supports are available to assist parents in meeting the needs of their child with ASD and promoting their overall well-being. From educational programs and therapeutic interventions to parent training and support groups, these resources offer valuable guidance, information, and emotional support to families.

Here are some online resources to start with:

Additionally, several books come highly recommended for parents and caregivers of children with ASD, including:

  • “An Early Start For Your Child With Autism” by Sally J. Rogers, Geraldine Dawson, and Laurie A. Vismara

  • “Achieving Best Behavior for Children with Developmental Disabilities: A Step-by-Step Workbook for Parent and Caregivers” by Paw Lewis

In addition to these resources, the recommendations section of a diagnostic report should include a variety of service recommendations tailored to the child’s needs. Families can also reach out to their private or public insurance programs to determine local providers that are in-network and can offer support services.

Looking Ahead

It is important following a diagnosis of ASD that the family and caregivers look at it as a beginning rather than a predetermined path for the child’s life. The family unit should prioritize finding the most effective ways to support the child in achieving the highest levels of independence and happiness possible.

While each child is unique in their abilities, there are many inspiring success stories of children with autism who have achieved remarkable milestones and overcome significant challenges. Temple Grandin, a renowned author, speaker, and animal scientist, was diagnosed with autism at a young age. She now speaks at conferences and is a leading advocate for autism awareness and education. Carly Fleischman, diagnosed with severe autism and unable to speak until she was 11, now communicates through typing and has become a successful author, advocate, and talk show host.

Advances in technology, including AI, are creating new methods for children with autism to learn in innovative ways that can cater to their unique needs. Emerging technologies can help bridge the gap between traditional education methods and the diverse learning styles and communication challenges associated with autism spectrum disorder.

As autism diagnoses become more prevalent, there is a growing global awareness and focus on the condition. This heightened awareness extends into healthcare, education, research, and public policy, as communities strive to better understand and support individuals on the autism spectrum.


Receiving an F84.0 ASD diagnosis can understandably feel overwhelming for families and caregivers. However, it’s important to recognize that this diagnosis marks the initial step toward accessing essential support systems and nurturing your child through their journey. It’s crucial to maintain a perspective that prioritizes your child’s identity beyond their diagnosis. While their unique needs and learning style may set them apart, they remain foremost a cherished child who thrives on the love, support, and understanding from their family and community.

Parents and caregivers should anticipate that their journey will lead them on a unique path, distinct from parenting a neurotypical child. By actively seeking out available support and resources, both for themselves and their child, they can empower themselves to fulfill the crucial role of advocate throughout their journey.

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