FY2027 ICD-10-CM reference
Q00: Anencephaly and similar malformations
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Anencephaly and similar malformations. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
CMS-HCC V28
Not applicable to this nonbillable heading
CMS-HCC V24
Not applicable to this nonbillable heading
ESRD
Not applicable to this nonbillable heading
PACE
Not applicable to this nonbillable heading
RxHCC
Not applicable to this nonbillable heading
HHS-HCC
Not applicable to this nonbillable heading
More specific FY2027 codes
- Q00.0: AnencephalyBillable code
- Q00.1: CraniorachischisisBillable code
- Q00.2: IniencephalyBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
Codes from this chapter are not for use on maternal records
Source: Q00-QA1 (chapter, inherited).
Excludes2
inborn errors of metabolism (E70-E88)
Source: Q00-QA1 (chapter, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does Q00 mean in FY2027?
The official ICD-10-CM descriptor is Anencephaly and similar malformations. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is Q00 billable in FY2027?
The FY2027 order file marks Q00 as a nonbillable heading. Select a complete billable child code.
Does Q00 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition