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Q00 Anencephaly and similar malformations

ICD-10-CM category Q00 sits in Chapter 17 (Congenital malformations, deformations and chromosomal abnormalities, Q00-Q99). It contains 3 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in Q00

CodeDescription
Q00.0Anencephaly
Q00.1Craniorachischisis
Q00.2Iniencephaly

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