DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q66 Congenital deformities of feet

  • Header · not billable

Q66 is not billable. The category heads 32 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q65-Q79 Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)
  3. Q66 Congenital deformities of feet
Billable codes
32
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
61

Codes in Q66

  1. Q66.0
    Congenital talipes equinovarus
    Header
  2. Q66.00
    Congenital talipes equinovarus, unspecified foot
    BillableExempt
  3. Q66.01
    Congenital talipes equinovarus, right foot
    BillableExempt
  4. Q66.02
    Congenital talipes equinovarus, left foot
    BillableExempt
  5. Q66.1
    Congenital talipes calcaneovarus
    Header
  6. Q66.10
    Congenital talipes calcaneovarus, unspecified foot
    BillableExempt
  7. Q66.11
    Congenital talipes calcaneovarus, right foot
    BillableExempt
  8. Q66.12
    Congenital talipes calcaneovarus, left foot
    BillableExempt
  9. Q66.2
    Congenital metatarsus (primus) varus
    Header
  10. Q66.21
    Congenital metatarsus primus varus
    Header
  11. Q66.211
    Congenital metatarsus primus varus, right foot
    BillableExempt
  12. Q66.212
    Congenital metatarsus primus varus, left foot
    BillableExempt
  13. Q66.219
    Congenital metatarsus primus varus, unspecified foot
    BillableExempt
  14. Q66.22
    Congenital metatarsus adductus
    Header
    Inclusion terms 1

    Inclusion terms

    • Congenital metatarsus varus
  15. Q66.221
    Congenital metatarsus adductus, right foot
    BillableExempt
  16. Q66.222
    Congenital metatarsus adductus, left foot
    BillableExempt
  17. Q66.229
    Congenital metatarsus adductus, unspecified foot
    BillableExempt
  18. Q66.3
    Other congenital varus deformities of feet
    Header
    Inclusion terms 1

    Inclusion terms

    • Hallux varus, congenital
  19. Q66.30
    Other congenital varus deformities of feet, unspecified foot
    BillableExempt
  20. Q66.31
    Other congenital varus deformities of feet, right foot
    BillableExempt
  21. Q66.32
    Other congenital varus deformities of feet, left foot
    BillableExempt
  22. Q66.4
    Congenital talipes calcaneovalgus
    Header
  23. Q66.40
    Congenital talipes calcaneovalgus, unspecified foot
    BillableExempt
  24. Q66.41
    Congenital talipes calcaneovalgus, right foot
    BillableExempt
  25. Q66.42
    Congenital talipes calcaneovalgus, left foot
    BillableExempt
  26. Q66.5
    Congenital pes planus
    Header
    Inclusion terms 3, Excludes1 1

    Inclusion terms

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

    Excludes1

    • pes planus, acquired (M21.4) M21.4
  27. Q66.50
    Congenital pes planus, unspecified foot
    BillableExempt
  28. Q66.51
    Congenital pes planus, right foot
    BillableExempt
  29. Q66.52
    Congenital pes planus, left foot
    BillableExempt
  30. Q66.6
    Other congenital valgus deformities of feet
    BillableExempt
    Inclusion terms 1

    Inclusion terms

    • Congenital metatarsus valgus
  31. Q66.7
    Congenital pes cavus
    Header
  32. Q66.70
    Congenital pes cavus, unspecified foot
    BillableExempt
  33. Q66.71
    Congenital pes cavus, right foot
    BillableExempt
  34. Q66.72
    Congenital pes cavus, left foot
    BillableExempt
  35. Q66.8
    Other congenital deformities of feet
    Header
  36. Q66.80
    Congenital vertical talus deformity, unspecified foot
    BillableExempt
  37. Q66.81
    Congenital vertical talus deformity, right foot
    BillableExempt
  38. Q66.82
    Congenital vertical talus deformity, left foot
    BillableExempt
  39. Q66.89
    Other specified congenital deformities of feet
    BillableExempt
    Inclusion terms 5

    Inclusion terms

    • Congenital asymmetric talipes
    • Congenital clubfoot NOS
    • Congenital talipes NOS
    • Congenital tarsal coalition
    • Hammer toe, congenital
  40. Q66.9
    Congenital deformity of feet, unspecified
    Header
  41. Q66.90
    Congenital deformity of feet, unspecified, unspecified foot
    BillableExempt
  42. Q66.91
    Congenital deformity of feet, unspecified, right foot
    BillableExempt
  43. Q66.92
    Congenital deformity of feet, unspecified, left foot
    BillableExempt

Sources of each column.

Instructions

At Q66

Excludes1

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

Notes that also apply

Chapter 17 instructions (Notes 1, Excludes2 1): printed on the chapter 17 page.

Index entries

  • Equinovarus (congenital) (talipes) → Q66.0-
  • Cavovarus foot, congenital → Q66.1-
  • Primus varus → Q66.21-
  • Cavus foot (congenital) → Q66.7-
  • Gampsodactylia (congenital) → Q66.7-
  • Hollow foot (congenital) → Q66.7-
  • Vertical talus (congenital) → Q66.80
  • Clawfoot (congenital) → Q66.89
  • Clawtoe (congenital) → Q66.89
  • Clubfoot (congenital) → Q66.89
  • Talipes (congenital) → Q66.89
  • Clubfoot (congenital)equinovarus → Q66.0-
  • Talipes (congenital)equinovarus → Q66.0-
  • Talipes (congenital)calcaneovarus → Q66.1-
  • Metatarsus, metatarsaladductus, congenital → Q66.22-
  • Metatarsus, metatarsalvarus (congenital) → Q66.22-
  • Talipes (congenital)varus → Q66.3-
  • Talipes (congenital)calcaneovalgus → Q66.4-
  • Metatarsus, metatarsalvalgus (abductus), congenital → Q66.6
  • Pes (congenital)valgus → Q66.6
  • Talipes (congenital)equinovalgus → Q66.6
  • Talipes (congenital)planovalgus → Q66.6
  • Talipes (congenital)valgus → Q66.6
  • Pes (congenital)cavus → Q66.7-
  • Talipes (congenital)cavus → Q66.7-
  • Talipes (congenital)percavus → Q66.7-
  • Deformityvertical talus (congenital) → Q66.80
  • Vertical talus (congenital)right foot → Q66.81
  • Vertical talus (congenital)left foot → Q66.82
  • Coalitioncalcaneo-scaphoid → Q66.89
  • Coalitiontarsal → Q66.89
  • Hammer toe (acquired) NECcongenital → Q66.89
  • Overlapping toe (acquired)congenital (fifth toe) → Q66.89
  • Pes (congenital)adductus → Q66.89
  • Talipes (congenital)asymmetric → Q66.89
  • Talipes (congenital)calcaneus → Q66.89
  • Talipes (congenital)equinus → Q66.89
  • Distortion(s) (congenital)foot → Q66.9-
  • Distortion(s) (congenital)toe(s) → Q66.9-
  • Deformityfoot (acquired)cavovarus (congenital) → Q66.1-

21 more, longer entries are not listed; the search box finds them by word.

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