Q00
⚠ Non-billable (Header)Anencephaly and similar malformations
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Child Codes (3)
Clinical Description
ICD-10-CM code Q00 represents anencephaly and similar malformations. This code falls under the Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
Frequently Asked Questions
What is ICD-10 code Q00?
ICD-10-CM code Q00 is "Anencephaly and similar malformations". It belongs to the category: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0).
Is Q00 a billable ICD-10 code?
No, Q00 is a non-billable header code. A more specific child code must be used for billing.
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)