Q00

Non-billable

Anencephaly and similar malformations

Q00 is the ICD-10-CM code for Anencephaly and similar malformations. It is a non-billable category code — use a more specific child code such as Q00.0 for billing.

Status
Header (non-billable)
Chapter
Q00-Q99
Subcodes
3
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code Q00?
Q00 is the ICD-10-CM code for "Anencephaly and similar malformations". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q00 a billable code?
No — Q00 is a non-billable header code. Use a more specific child code (such as Q00.0) for billing.
What are the subcodes of Q00?
Q00 has 3 more specific child codes, including Q00.0, Q00.1, Q00.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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