FY2027 ICD-10-CM reference
Q66.5: Congenital pes planus
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Congenital pes planus. 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.
More specific FY2027 codes
- Q66.50: Congenital pes planus, unspecified footBillable code
- Q66.51: Congenital pes planus, right footBillable code
- Q66.52: Congenital pes planus, left footBillable 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).
Excludes1
reduction defects of feet (Q72.-)
Source: Q66 (category, inherited).
Excludes1
valgus deformities (acquired) (M21.0-)
Source: Q66 (category, inherited).
Excludes1
varus deformities (acquired) (M21.1-)
Source: Q66 (category, inherited).
Instructional note
Congenital flat foot
Source: Q66.5 (self, direct).
Instructional note
Congenital rigid flat foot
Source: Q66.5 (self, direct).
Instructional note
Congenital spastic (everted) flat foot
Source: Q66.5 (self, direct).
Excludes1
pes planus, acquired (M21.4)
Source: Q66.5 (self, direct).
Compare the FY2027 additions, removals and billable-status changes
What does Q66.5 mean in FY2027?
The official ICD-10-CM descriptor is Congenital pes planus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is Q66.5 billable in FY2027?
The FY2027 order file marks Q66.5 as a nonbillable heading. Select a complete billable child code.
Does Q66.5 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. Read the FY2027 Official Guidelines.
Review the FY2026 April edition