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Q66.5

⚠ Non-billable (Header)

Congenital pes planus

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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Also Known As

Congenital flat footCongenital rigid flat footCongenital spastic (everted) flat foot

❌ Excludes1

direct

Cannot be coded with Q66.5

  • • pes planus, acquired (M21.4)

❌ Excludes1

inherited from Q66

Rules from parent category Q66: Congenital deformities of feet

  • • reduction defects of feet (Q72.-)
  • • valgus deformities (acquired) (M21.0-)
  • • varus deformities (acquired) (M21.1-)

Child Codes (3)

Q66.50Congenital pes planus, unspecified footQ66.51Congenital pes planus, right footQ66.52Congenital pes planus, left foot

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Code Information

CodeQ66.5
BillableNo — Header code
ParentQ66
CategoryCongenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Excludes14 rule(s)
Excludes20 note(s)
Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)