Q04.5 is the authoritative medical code for Megalencephaly. This classification is used in medical billing and clinical recording to specify the clinical criteria for megalencephaly (ICD-10-CM Q04.5), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Sequencing, inclusion, and exclusion notes published for Q04.5 in the official ICD-10-CM tabular list.
Conditions that can never be reported with this code; the two are mutually exclusive.
Per Excludes1 instructions, Q04.5 must not be reported with: cyclopia (Q87.0); macrocephaly (Q75.3).
Official ICD-10-CM classifications in the same code family as Q04.5, with their registry titles.
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: