Autism (ASD) Diagnostic Evaluation Report: Template & Guide
What Is an Autism Diagnostic Evaluation?
An autism diagnostic evaluation is a comprehensive, multi-method assessment designed to determine whether an individual meets DSM-5-TR criteria for Autism Spectrum Disorder (ASD). The evaluation integrates developmental history, direct behavioral observation, standardized assessment tools, cognitive testing, and information from multiple informants (parents, teachers, and other caregivers) to arrive at a diagnostic determination and a functional profile that guides intervention planning.
Unlike a brief screening (e.g., M-CHAT-R/F), the diagnostic evaluation is an in-depth clinical process typically requiring several hours. It is conducted by a licensed psychologist, developmental pediatrician, or multidisciplinary team with specialized training in autism assessment. The resulting report must document the presence or absence of DSM-5-TR criteria across both core domains — (A) persistent deficits in social communication and social interaction, and (B) restricted, repetitive patterns of behavior, interests, or activities — along with specifiers for severity level, intellectual impairment, language impairment, and associated conditions.
The evaluation serves multiple purposes: confirming or ruling out an ASD diagnosis, identifying co-occurring conditions (ADHD, anxiety, intellectual disability, language disorder), characterizing the individual's cognitive and adaptive functioning profile, and providing specific, actionable recommendations for intervention, educational placement, and family support.
When You Need It
- Early identification — When a toddler or preschooler fails a developmental screening (e.g., M-CHAT-R/F) or a pediatrician or parent observes concerning social communication differences such as limited eye contact, absence of pointing, lack of shared enjoyment, or delayed language development.
- School-age referral — When a child is struggling socially, displaying repetitive behaviors, having difficulty with transitions, or showing a rigid behavioral profile that prompts concern from teachers or school psychologists.
- Late or missed diagnosis — Older children, adolescents, or adults who were not identified earlier — particularly females and individuals without intellectual disability who may have "camouflaged" or masked their social difficulties.
- Differential diagnosis — When the clinical presentation overlaps with social anxiety disorder, ADHD, language disorder, intellectual disability, reactive attachment disorder, or selective mutism, and the clinician needs to determine whether ASD accounts for the presentation.
- Access to services — Many intervention programs, insurance authorizations for ABA therapy, school-based autism classifications, and state developmental disability services require a formal diagnostic evaluation by a qualified professional.
- Re-evaluation — When a prior diagnosis needs to be confirmed, updated, or when a child given an earlier provisional diagnosis has reached an age where a more definitive evaluation is possible.
Key Components / Required Sections
- Identifying Information and Referral Question — Demographics, referral source, and the specific diagnostic question.
- Evaluation Methods — All assessment tools, interviews, observations, questionnaires, and records reviewed.
- Developmental History — Pregnancy and birth, motor milestones, language development (first words, phrases, regression if any), social development (joint attention, imaginative play, peer relationships), behavioral patterns (routines, sensory sensitivities, repetitive behaviors), and medical history.
- Family History — ASD, ADHD, learning disabilities, psychiatric conditions, and developmental delays in biological relatives.
- Educational History — Current placement, services received, academic and social functioning in school.
- Parent/Caregiver Interview — Structured or semi-structured interview covering DSM-5-TR criteria (ADI-R or equivalent).
- Teacher/School Report — Rating scales, narrative reports, or direct interview with educational staff.
- Behavioral Observations — Detailed observation of social communication, play, restricted/repetitive behaviors, and sensory responses during the evaluation.
- Standardized Autism Assessment — ADOS-2 module, algorithm scores, and comparison to diagnostic thresholds.
- Cognitive Assessment — IQ testing to characterize intellectual functioning and identify intellectual disability.
- Adaptive Behavior Assessment — Vineland-3 or ABAS-3 to assess daily living skills, communication, and socialization.
- Additional Testing — Language assessment, sensory profile, or behavioral/emotional rating scales as indicated.
- DSM-5-TR Criteria Mapping — Explicit documentation of how each criterion is or is not met, with supporting evidence.
- Diagnostic Impressions — ASD diagnosis with severity level specifiers, co-occurring conditions, and rule-outs.
- Recommendations — Intervention, educational placement, therapies, family resources, and follow-up.
Example Report
Autism Diagnostic Evaluation Report — Pediatric (Age 6)
AUTISM DIAGNOSTIC EVALUATION REPORT
Client Name: L.K. Date of Birth: XX/XX/2019 Age at Evaluation: 6 years, 4 months Date(s) of Evaluation: 02/05/2026, 02/12/2026 Date of Report: 02/24/2026 Evaluator: [Psychologist Name], Ph.D., Licensed Psychologist
REFERRAL QUESTION
L.K. was referred by his pediatrician for a comprehensive autism evaluation following parental concerns about his social development, repetitive behaviors, and difficulty with transitions. His kindergarten teacher has also expressed concern about his limited engagement with peers and intense, narrow interests. The referral questions are: (1) Does L.K. meet DSM-5-TR criteria for Autism Spectrum Disorder? (2) What is his cognitive and adaptive functioning profile? (3) What interventions and educational supports are recommended?
EVALUATION METHODS
- Autism Diagnostic Observation Schedule–Second Edition (ADOS-2), Module 2
- Autism Diagnostic Interview–Revised (ADI-R), administered with L.K.'s mother
- Wechsler Preschool and Primary Scale of Intelligence–Fourth Edition (WPPSI-IV)
- Vineland Adaptive Behavior Scales–Third Edition (Vineland-3), Parent/Caregiver Interview Form
- Social Responsiveness Scale–Second Edition (SRS-2), Parent and Teacher forms
- Sensory Profile–2, Caregiver Questionnaire
- Clinical interview with parents (approximately 90 minutes)
- Telephone interview with kindergarten teacher
- Review of pediatric developmental records and early intervention records
DEVELOPMENTAL HISTORY
Pregnancy/Birth: Full-term pregnancy without complications. Normal vaginal delivery. Birth weight 7 lbs 6 oz. No NICU stay.
Motor Development: Sat independently at 6 months, walked at 13 months. Parents describe fine motor skills as adequate.
Language Development: First words at approximately 18 months (later than siblings). Combined two-word phrases by age 2.5 years. Parents report he currently speaks in full sentences but has an unusual prosody ("sounds like a little professor") and frequently uses scripted phrases from television shows. He tends to talk at length about his interests (trains, weather patterns) without noticing whether the listener is engaged. Pronoun reversal was present until approximately age 4.
Social Development: As an infant, L.K. was described as content to be alone and was not a "cuddly" baby. He did not consistently point to show objects to others until approximately 20 months. He has limited interest in peers and prefers parallel play. At school, he stands at the edge of the playground or engages in solitary pretend play involving train scenarios. He has no reciprocal friendships. He becomes very distressed when classroom routines change unexpectedly.
Restricted and Repetitive Behaviors: L.K. has had an intense interest in trains since age 2 that dominates his play, conversation, and drawing. He memorizes train schedules and corrects adults about train facts. He lines up toy trains in specific orders and becomes very upset if anyone moves them. He flaps his hands when excited. He has strong sensory preferences, including aversion to certain food textures (will only eat crunchy foods), distress with loud noises (covers ears during fire drills and assemblies), and insistence on wearing the same type of socks.
Medical History: No significant medical conditions. Hearing and vision screened and normal. No seizures. No history of regression.
PARENT INTERVIEW AND RATING SCALES
The ADI-R was administered with L.K.'s mother, who provided a detailed developmental history. Scores exceeded the diagnostic algorithm cutoffs in all three domains: Reciprocal Social Interaction (score: 18; cutoff: 10), Communication (score: 14; cutoff: 8), and Restricted, Repetitive, and Stereotyped Patterns (score: 6; cutoff: 3).
SRS-2 Parent Form: Total T-score = 78 (Severe range). Social Communication and Interaction subscale T = 76. Restricted Interests and Repetitive Behavior subscale T = 80.
SRS-2 Teacher Form: Total T-score = 74 (Severe range). Consistent elevations across subscales.
TEACHER REPORT
L.K.'s kindergarten teacher reports that he is a bright student who excels at memorizing facts and has strong letter and number recognition. However, she observes that he does not initiate social interactions with peers, rarely makes eye contact, and becomes "rigid" when the daily schedule changes (e.g., substitute teacher, assembly, indoor recess). He does not participate in collaborative play and becomes distressed during group activities. He frequently talks about trains during circle time regardless of the topic. He follows classroom rules when they are clearly stated and predictable.
BEHAVIORAL OBSERVATIONS (INCLUDING ADOS-2)
General Observations: L.K. separated from his mother without difficulty but did not greet the examiner or make eye contact upon entering the room. He immediately noticed a toy train on the shelf and began describing it in detail, including its manufacturer and model. His speech was grammatically correct but had a flat, monotone quality with unusual stress patterns. He did not engage in conversational back-and-forth; interactions were largely one-sided and centered on trains.
ADOS-2 Observations (Module 2): During structured and semi-structured activities, L.K. showed limited social overtures. He did not spontaneously show, give, or direct the examiner's attention to objects of interest (limited joint attention). When the examiner expressed distress during the birthday party scenario, L.K. did not respond with concern or comfort. He demonstrated limited range of facial expression and rarely coordinated eye contact with verbal communication or gestures. Imaginative play was limited to train scenarios and was repetitive. He flapped his hands during a bubble activity. He did not engage in reciprocal social play with the examiner unless the play involved his special interest.
ADOS-2 Algorithm Scores:
- Social Affect: 12 (Autism cutoff: 8)
- Restricted and Repetitive Behavior: 5 (Autism cutoff: 4)
- Total: 17 (Autism cutoff: 12)
- Comparison Score: 7 (Moderate level of ASD-related symptoms)
COGNITIVE ASSESSMENT (WPPSI-IV)
| Index | Standard Score | Percentile | Classification |
|---|---|---|---|
| Verbal Comprehension (VCI) | 108 | 70th | Average |
| Visual Spatial (VSI) | 118 | 88th | High Average |
| Fluid Reasoning (FRI) | 112 | 79th | High Average |
| Working Memory (WMI) | 102 | 55th | Average |
| Processing Speed (PSI) | 94 | 34th | Average |
| Full Scale IQ (FSIQ) | 108 | 70th | Average |
L.K.'s overall cognitive ability falls in the Average range, with a notable strength in Visual Spatial reasoning (High Average). There is no evidence of intellectual disability. His cognitive profile indicates that he has the intellectual capacity to access grade-level curriculum with appropriate supports.
ADAPTIVE BEHAVIOR (Vineland-3)
| Domain | Standard Score | Percentile | Adaptive Level |
|---|---|---|---|
| Communication | 82 | 12th | Moderately Low |
| Daily Living Skills | 78 | 7th | Low |
| Socialization | 68 | 2nd | Low |
| Adaptive Behavior Composite | 74 | 4th | Low |
L.K.'s adaptive functioning is significantly below his measured cognitive ability, a pattern commonly seen in ASD. His Socialization score is the lowest domain, reflecting deficits in interpersonal relationships, play/leisure skills, and coping skills.
SENSORY PROFILE-2
The Sensory Profile-2 indicates "Much More Than Others" patterns in Sensory Sensitivity and Sensory Avoiding quadrants. Specific areas of concern include auditory sensitivity, tactile sensitivity (clothing, food textures), and sensory seeking (hand flapping, visual fascination with spinning objects).
DSM-5-TR CRITERIA MAPPING
Criterion A — Persistent deficits in social communication and social interaction (all three met):
- A1: Deficits in social-emotional reciprocity — limited conversational reciprocity, one-sided interactions centered on special interests, reduced sharing of emotions and interests.
- A2: Deficits in nonverbal communicative behaviors — limited eye contact, flat affect, poor coordination of eye contact with speech and gesture, unusual prosody.
- A3: Deficits in developing, maintaining, and understanding relationships — no reciprocal friendships, limited interest in peers, absent cooperative or imaginative play with others.
Criterion B — Restricted, repetitive patterns of behavior, interests, or activities (three of four met):
- B1: Stereotyped motor movements — hand flapping when excited.
- B2: Insistence on sameness — distress with schedule changes, rigid routines around food and clothing, inflexible adherence to play sequences.
- B3: Highly restricted, fixated interests — intense preoccupation with trains that is abnormal in intensity and focus.
- B4: Hyper-reactivity to sensory input — auditory sensitivity, tactile defensiveness, visual fascination with spinning.
Criterion C: Symptoms present in early developmental period — confirmed by developmental history.
Criterion D: Symptoms cause clinically significant impairment — documented across home, school, and evaluation settings.
Criterion E: Not better explained by intellectual disability or global developmental delay — cognitive testing confirms Average intellectual ability.
DIAGNOSTIC IMPRESSIONS (DSM-5-TR)
- Autism Spectrum Disorder (F84.0), requiring support (Level 1) for restricted, repetitive behaviors; requiring substantial support (Level 2) for social communication
- Without accompanying intellectual impairment
- Without accompanying language impairment (structural language intact; pragmatic language impaired)
- Rule out: Attention-Deficit/Hyperactivity Disorder, Predominantly Inattentive Presentation (some attention concerns reported by teacher; recommend monitoring and reassessment if concerns persist after autism-specific supports are in place)
RECOMMENDATIONS
- School-Based Classification: L.K. meets criteria for educational classification of Autism and should be referred to the Committee on Special Education for an IEP with specialized instruction and related services.
- Applied Behavior Analysis (ABA): Referral for ABA services focusing on social communication skills, flexibility, and functional daily living skills. A Board Certified Behavior Analyst (BCBA) should conduct a functional assessment and develop an individualized program.
- Speech-Language Therapy: Pragmatic (social) language therapy targeting conversational reciprocity, topic maintenance, perspective-taking, and use of nonverbal communication. A speech-language pathologist with experience in ASD is recommended.
- Social Skills Group: A structured, evidence-based social skills program with same-age peers (e.g., PEERS for younger children, Social Thinking curriculum) to practice reciprocal interaction, cooperative play, and friendship skills.
- Occupational Therapy: Sensory integration-informed occupational therapy to address auditory sensitivity, tactile defensiveness, and self-regulation. A sensory diet should be developed for home and school environments.
- Classroom Accommodations: Visual schedule to support transitions; advance notice of schedule changes; a quiet space for sensory breaks; social narratives (Social Stories) for novel situations; structured recess with adult facilitation to support peer engagement; incorporation of special interests into academic activities when possible.
- Parent Training and Support: Parent education in ASD-specific behavior management strategies. Connect the family with local autism parent support groups and the Autism Society of America.
- Monitoring for ADHD: If attention difficulties persist after autism-specific supports are in place for 6 months, formal ADHD evaluation with Conners rating scales and CPT is recommended.
- Re-evaluation: Comprehensive re-evaluation in 2 to 3 years to track developmental progress, update the cognitive and adaptive profile, and refine recommendations.
[Psychologist Name], Ph.D. Licensed Psychologist, [License #]
This is a sample for educational purposes only — not real patient data.
How to Write It Step by Step
Step 1: Collect a Thorough Developmental History. Autism is a neurodevelopmental condition — its roots are in early development. Use the ADI-R or a comprehensive semi-structured interview to systematically explore early language milestones, social development (joint attention, imaginative play, peer engagement), and the emergence of restricted/repetitive behaviors. Ask about regression, as approximately 25–30% of children with ASD experience language regression.
Step 2: Gather Multi-Informant Data. Obtain rating scales from both parents and teachers. Autism-related behaviors may present differently across settings. Discrepancies between home and school reports are common and clinically informative — they do not necessarily argue against the diagnosis.
Step 3: Administer the ADOS-2 with the Correct Module. Select the module based on the individual's expressive language level, not their age. Module 1 is for children who do not consistently use phrase speech; Module 2 for those with phrase speech but not fluent; Module 3 for verbally fluent children and adolescents; Module 4 for verbally fluent adolescents and adults. Record algorithm scores and the comparison score.
Step 4: Conduct Cognitive Testing. Intellectual functioning is a required specifier for ASD diagnosis and is critical for differential diagnosis (ASD vs. intellectual disability) and educational planning. Choose a measure appropriate for the individual's age, language level, and behavioral presentation. Nonverbal cognitive measures (e.g., Leiter-3) may be appropriate for minimally verbal individuals.
Step 5: Assess Adaptive Behavior. The gap between cognitive ability and adaptive functioning is a hallmark of ASD and is essential for service eligibility. Administer the Vineland-3 or ABAS-3 via parent interview.
Step 6: Map Findings to DSM-5-TR Criteria Explicitly. The report should contain a clear section that walks through each criterion and provides the specific evidence supporting whether it is met or not met. This documentation is often required by insurance companies and service agencies.
Step 7: Assign Severity Levels and Specifiers. DSM-5-TR requires severity ratings for both social communication and restricted/repetitive behaviors (Level 1, 2, or 3), as well as specifiers for intellectual impairment, language impairment, known medical or genetic conditions, and associated neurodevelopmental or mental health conditions.
Step 8: Write Recommendations That Are Specific and Immediately Actionable. Families receiving an autism diagnosis need clear next steps. Name specific therapies, provide referral pathways, recommend school-based services by name, and connect the family to community resources. Avoid vague recommendations that leave families unsure where to start.
Common Mistakes
- Diagnosing solely based on the ADOS-2. The ADOS-2 is one component of the evaluation, not the evaluation itself. Clinical judgment integrating all data sources must drive the diagnosis. Some individuals with ASD score below the ADOS-2 cutoff, and some individuals without ASD score above it.
- Using the wrong ADOS-2 module. Selecting a module based on age rather than expressive language level produces invalid results. A 10-year-old with limited phrase speech should receive Module 1 or 2, not Module 3.
- Neglecting to assess for co-occurring conditions. ADHD, anxiety, depression, and intellectual disability are highly comorbid with ASD. Failing to identify these conditions results in incomplete treatment planning.
- Insufficient developmental history. An autism evaluation that does not include a detailed early developmental history is incomplete. Current behavior alone is insufficient — DSM-5-TR requires that symptoms be present in the early developmental period.
- Overlooking camouflaging and masking. Females, individuals with high cognitive ability, and culturally diverse populations may not present with the "classic" autism profile. The evaluator must be aware that social camouflaging can suppress observable symptoms during the ADOS-2 while the individual still meets clinical criteria.
- Writing recommendations without specifying interventions. "Provide social skills training" is not a recommendation — it is a category. Specify the type (structured group vs. individual coaching), the curriculum or approach, and the frequency.
- Failing to include severity specifiers. Insurance companies, school districts, and service agencies rely on DSM-5-TR severity levels and specifiers to determine service eligibility and intensity. Omitting them creates barriers for families seeking services.
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