Top ICD-10 Codes for ABA Therapy
1. F84.0 – Autism Spectrum Disorder (ASD)
• Description: A neurodevelopmental disorder characterized by difficulties with social interaction, verbal and nonverbal communication, and restricted, repetitive behaviors.
• Used When: A formal diagnosis of ASD has been made by a qualified clinician (psychologist, psychiatrist, or developmental pediatrician).
• What This Might Look Like:
o Limited eye contact
o Repetitive movements (hand flapping, spinning)
o Echolalia (repeating words)
o Trouble adapting to changes
• When to Refer for ABA:
o As soon as a diagnosis is made
o If delays in communication, social interaction, or daily living skills are impacting function
o If problem behaviors (aggression, tantrums, elopement) are present
2. F84.5 – Asperger’s Syndrome (now under ASD umbrella in DSM-5)
• Description: Milder form of ASD without significant language or cognitive delays; now coded as part of F84.0 in many clinical practices.
• Used When: Previously diagnosed cases still recognized under ICD-10
• What This Might Look Like:
o High verbal ability but poor social awareness
o Intense focus on specific topics
o Difficulty reading social cues
• When to Refer for ABA:
o When social skills or behaviors interfere with peer relationships or academics
3. F84.9 – Pervasive Developmental Disorder, Unspecified
• Description: Used when autism spectrum symptoms are present but don’t fully meet ASD diagnostic criteria
• Used When: Early developmental concerns are noted without a clear-cut diagnosis
• What This Might Look Like:
o Significant developmental delays without confirmed ASD
• When to Refer for ABA:
o If functional impairment exists in daily skills, behavior, or communication
4. F90.0 – Attention-Deficit Hyperactivity Disorder, Predominantly Inattentive Type
• Description: Characterized by distractibility, disorganization, forgetfulness
• Used When: Symptoms persist for more than 6 months and impact functioning
• What This Might Look Like:
o Can’t focus on tasks or instructions
o Often loses things
o Easily distracted
• When to Refer for ABA:
o When ADHD is co-occurring with ASD or behaviors need structured intervention
o If school and home settings report significant functional issues
5. F90.1 – ADHD, Predominantly Hyperactive/Impulsive Type
• Description: Marked by impulsive behaviors and high activity level
• Used When: Symptoms interfere with school, social, or home life
• What This Might Look Like:
o Constant fidgeting or squirming
o Difficulty staying seated
o Interrupts or talks excessively
• When to Refer for ABA:
o When behavior modification and structure are needed
o If emotional regulation is difficult
6. F91.3 – Oppositional Defiant Disorder (ODD)
• Description: Pattern of angry/irritable mood, argumentative behavior, or vindictiveness
• Used When: Behavior is persistent (6+ months) and disruptive
• What This Might Look Like:
o Frequent temper tantrums
o Refusal to comply with rules
o Hostile behavior toward authority
• When to Refer for ABA:
o If traditional behavioral supports aren’t effective
o Safety concerns at school or home due to defiance
7. F93.9 – Childhood Emotional Disorder, Unspecified
• Description: Emotional or behavioral difficulties that don’t fall neatly into another category
• Used When: Emotional concerns are present, but further clarification is needed
• What This Might Look Like:
o Anxiety, sadness, clinginess, or fears not otherwise explained
• When to Refer for ABA:
o If behaviors are impairing function or learning
o While waiting for a clearer diagnosis
8. R62.50 – Unspecified Lack of Expected Normal Physiological Development in Childhood
• Description: Used for developmental delays when a specific diagnosis is not yet established
• Used When: Milestones (speech, motor, social) are significantly delayed
• What This Might Look Like:
o Not talking by age 2
o Not responding to name
o Poor peer interaction
• When to Refer for ABA:
o If developmental delay includes communication and social interaction deficits
o Especially when ASD is suspected
🗒️ Quick Reference Summary Table
ICD-10 Code Diagnosis When to Refer for ABA
F84.0 Autism Spectrum Disorder Upon diagnosis or signs of significant behavior issues
F84.5 Asperger’s Syndrome Social/behavioral challenges impacting function
F84.9 PDD, Unspecified Delays with functional impact, pending full diagnosis
F90.0 ADHD – Inattentive Behavioral challenges, poor academic focus
F90.1 ADHD – Hyperactive Impulsivity or regulation issues interfering with life
F91.3 Oppositional Defiant Disorder Severe defiance, aggression, or school/home disruptions
F93.9 Childhood Emotional Disorder, Unspec. Behavioral concerns awaiting formal diagnosis
R62.50 Unspecified Dev. Delay Delays in speech/social skills with suspected ASD
Notes for Your Practice
• ABA therapy is evidence-based for children with Autism Spectrum Disorder, but many private insurers will authorize services under broader behavioral diagnoses, especially when accompanied by functional limitations.
• Ensure all referrals for ABA include:
o Medical necessity documentation
o Diagnostic report
o Functional impact noted by teachers, therapists, or parents
Additional ICD-10 Codes for ABA Therapy
9. F84.2 – Rett Syndrome
• Description: A rare genetic neurological disorder occurring almost exclusively in girls, characterized by normal early growth followed by a loss of purposeful hand skills and spoken language.
• Used When: A neurologist or geneticist confirms the diagnosis; often with MECP2 gene mutation.
• What This Might Look Like:
o Normal development followed by regression around 6–18 months
o Loss of speech and hand function (e.g., hand-wringing)
o Motor impairments, breathing issues, and seizures
• When to Refer for ABA:
o To improve quality of life through functional communication, motor imitation, and daily living skills
o When behavior regulation and sensory challenges need support
10. F84.3 – Other Childhood Disintegrative Disorder (Heller’s Syndrome)
• Description: A rare disorder marked by late-onset developmental delays in language, social function, and motor skills after at least 2 years of normal development.
• Used When: A regression occurs later than typical for ASD — usually after age 3.
• What This Might Look Like:
o Loss of vocabulary, toileting, social interest, or play skills
o Onset often dramatic and distressing to families
• When to Refer for ABA:
o Immediately after regression is noticed
o For intensive skill rebuilding, behavior regulation, and communication
11. F84.8 – Other Pervasive Developmental Disorders
• Description: Used for pervasive developmental disorders that do not meet criteria for specific conditions like autism or Rett syndrome.
• Used When: Symptoms are present but do not fall under a more defined diagnosis.
• What This Might Look Like:
o Atypical social and communication patterns
o Some repetitive behaviors, but not enough for full ASD diagnosis
• When to Refer for ABA:
o If child exhibits developmental or behavioral delays needing intensive support
o Can be used as a temporary code while a full evaluation is pending
Tennessee (TennCare & Commercial Plans)
• Medicaid (TennCare):
o Requires prior authorization, with medical necessity demonstrations based on ABA-specific assessments.
o No formal weekly or annual hour caps are publicly noted, but rigorous documentation is expected.
o Commonly covered ICD-10 codes: F84.x (ASD/PDD), F90, F91, R62.50 — when functional impairment and ABA necessity are documented.
• Commercial Insurance:
o Tennessee’s autism insurance mandate requires coverage for “medically necessary” services including ABA, with no annual limits, subject to parity protections.
o A prescribing provider must submit a treatment plan outlining diagnosis, goals, and rationale (e.g., F84.0, F84.2–F84.9).
✅ Tip: Include ICD codes F84.0, F84.2–F84.9, R62.50, with detailed documentation, especially for F84.2, F84.3, and F84.8, noting regressions or developmental challenges that signal ABA need.
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Kentucky (Medicaid & KY-Insured)
• Medicaid (Fee-for-Service + MCO):
o Only credentialed providers (LBA, BCBA) can bill, with prior authorization required under 907 KAR 15:010.
o Claims must include correct ICD-10 codes (F84.x, F90.x, F91.3, R62.50) and clear documentation of medical necessity. Duplication across providers is not allowed CCHPAutism SpeaksCabinet for Health and Family Services.
• Commercial Insurance:
o Kentucky has an autism insurance mandate covering ABA when prescribed and deemed medically necessary.
o Plans must cover services year-round and cannot impose calendar limits .
o Code usage mirrors Medicaid: F84.0, F84.2–F84.9, and co-occurring disorders (F90.x, F91.3).
✅ Tip: Kentucky payers often require BCBA-led assessments with IC 10 codes plus objective functional data to support authorizations.
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Indiana (IHCP & Commercial Mandate)
• Medicaid (IHCP):
o Effective April 1, 2025, IHCP will restrict comprehensive ABA to:
– 30, 32, or 38 hr/week, based on ASD severity or documented disability BH Business+2WBAA+2Adapt Ability Autism Services+2WISH-TV+2WISH-TV+2WBAA+2.
– A 3 year lifetime limit on comprehensive services, with focused ABA still available when medically necessary .
o Prior authorization required, including specific assessments (e.g., BASC-PRQ) and RBT credentialing before billing WISH-TV+10BH Business+10CCHP+10.
o Telehealth is allowed for 97155/97156 under strict supervision rules CCHP.
• Commercial Insurance:
o Covered under Indiana’s autism mandate for state-regulated plans, with no caps on ABA hours WISH-TV+4Autism Speaks+4Adapt Ability Autism Services+4.
o Requires a physician-prescribed care plan, including ICD-10 codes (F84.x) and documentation of necessity.
✅ Tip: Expect hour caps and lifetime limits for Medicaid, but in commercial plans, use the full range of F84.0–F84.9, F90.x, F91.3, and R62.50 with physician-issued care plans.