Autism Spectrum Disorders — CPB 0648 | AETNA Coverage Update

Aetna modified CPB 0648 for autism spectrum disorder (ASD) evaluation and treatment, effective October 3, 2025. Here's what billing teams need to do.

Aetna updated its autism spectrum disorder coverage policy under CPB 0648 to expand and clarify medical necessity criteria across a wide range of diagnostic and therapeutic services. This policy covers 314 CPT codes and 144 HCPCS codes, touching ASD billing across pediatric neurology, behavioral health, speech therapy, genetic testing, and applied behavior analysis. If your practice bills Aetna for any ASD-related services — diagnostic workups, ABA therapy, psychological testing, or augmentative communication — this update affects your reimbursement and your claim denial exposure.

Quick-Reference Table

Aetna Autism Spectrum Disorder Coverage Criteria and Medical Necessity Requirements 2025

The Aetna autism spectrum disorder coverage policy starts with a clear threshold: ASD evaluation and diagnosis are medically necessary when a clinician has identified developmental delays or persistent deficits in social communication and social interaction across multiple contexts. The evaluation must be performed by an appropriately certified or licensed health care professional. That's the gate. Everything else flows from there.

Once that threshold is met, this coverage policy opens up a broad set of billable services. Aetna covers ASD-specific developmental evaluations, cognitive and adaptive behavior evaluations, and speech-language pathology assessments. Psychological testing (CPT 96130, 96131) and neuropsychological testing (CPT 96132, 96133) are covered when selection criteria are met. Developmental test administration under CPT 96112 and 96113 also falls inside the covered range.

For hearing evaluation, Aetna covers formal audiological assessment including frequency-specific brainstem auditory evoked response and otoacoustic emissions. The auditory evoked potential codes — 92650, 92651, 92652, and 92653 — are in scope. EEG services under CPT 95812, 95813, 95816, 95819, and 95822 are covered specifically for symptoms that may indicate seizures. Not for EEG biofeedback. That distinction matters.

Genetic testing coverage requires specific clinical findings. Aetna covers high-resolution chromosome analysis (karyotype) and DNA analysis for fragile X syndrome when the child has mental retardation or mental retardation cannot be excluded — and when there's a family history of fragile X or mental retardation of undetermined etiology. Comparative genomic hybridization (CGH) under CPT 81228, 81229, 81277, and 81349, along with code 0209U, is covered when medical necessity criteria in CPB 0787 are met. Chromosome analysis codes 88245, 88248, 88249, 88261, 88262, 88263, and 88264 also appear in the covered set.

Lead testing under CPT 83655 is covered only when the child shows developmental delay and pica, or lives in a high-risk environment. Selective metabolic testing — including basic metabolic panel (CPT 80047, 80048) and comprehensive metabolic panel (CPT 80053) — is covered when specific clinical findings are present. Those triggers include cyclic vomiting, early seizures, lethargy, hearing impairment, hypotonia, visual impairment, unusual odor, dysmorphic features, evidence of mental retardation, or questionable newborn screening.

Sleep-deprived EEG is covered, but only when the child has clinical seizures, high suspicion of subclinical seizures, or symptoms of developmental regression. Quantitative plasma amino acid assays to detect phenylketonuria are covered. Genetic counseling for parents is covered under CPB 0189 criteria.

For therapy services, Aetna covers PT and OT evaluations for sensorimotor deficits. Psychotherapy codes 90832 through 90840 are covered when selection criteria are met. Psychotherapy codes 90845 through 90853 carry an important restriction — covered for co-morbid medical or psychological conditions, not for neurodevelopmental conditions themselves. That language will drive claim denials if your team bills those codes without documenting a qualifying co-morbidity.

Pharmacotherapy coverage for co-morbidity management is subject to the member's specific drug benefits. Check the plan description before assuming coverage.

Aetna Autism Spectrum Disorder Exclusions and Non-Covered Indications

Aetna draws clear lines on several categories within this coverage policy.

EEG biofeedback is not covered under this policy. The covered EEG codes (95812, 95813, 95816, 95819, 95822) explicitly exclude biofeedback applications. If you're billing EEG with a biofeedback indication, expect a claim denial.

Psychotherapy codes 90845–90853 are not covered when billed for the neurodevelopmental condition itself. Coverage only applies when there's a documented co-morbid medical or psychological condition. Billing these codes for ASD as the primary indication — without a qualifying co-morbid diagnosis — is a denial waiting to happen.

Sleep-deprived EEG without one of the three qualifying conditions (clinical seizures, subclinical seizure suspicion, or documented developmental regression) is not covered. Metabolic testing without the specified clinical triggers is also out of scope. Those triggers include cyclic vomiting, early seizures, lethargy, hearing impairment, hypotonia, visual impairment, unusual odor, dysmorphic features, evidence of mental retardation, or questionable newborn screening.

Genetic testing has narrow coverage triggers. High-resolution chromosome analysis without a family history of fragile X or mental retardation of undetermined etiology does not meet medical necessity. Document the specific clinical justification in the record before ordering or billing.

Coverage Indications at a Glance

Aetna Autism Spectrum Disorder Billing Guidelines and Action Items 2025

This policy is complex. With 314 CPT codes and conditional coverage rules stacked throughout, your documentation posture determines your denial rate. Here's what to do before the effective date of October 3, 2025.

If your practice has a high volume of Aetna ASD claims and you're not sure how this update interacts with your payer contract or compliance posture, talk to your compliance officer before October 3, 2025.

CPT, HCPCS, and ICD-10 Codes for Autism Spectrum Disorder Under CPB 0648

Covered CPT Codes (When Selection Criteria Are Met)

234 additional CPT codes and 144 HCPCS codes appear in the full policy. Review the complete code list at the source policy before updating your charge capture.

Note on HCPCS codes: The full policy includes 144 HCPCS codes. The policy data provided here does not include individual HCPCS code details. Pull the full CPB 0648 document from Aetna directly to confirm which HCPCS codes apply to your service lines.

Note on ICD-10-CM codes: The full policy references 21 ICD-10-CM codes. Individual code details were not included in the source data above. Confirm applicable diagnosis codes against the full CPB 0648 document before billing.