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Q74.1

Congenital malformation of knee

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 6 never code together
Q74code
Excludes1
  • polydactyly (Q69.-)Q69.-
  • reduction defect of limb (Q71-Q73)Q71-Q73
  • syndactyly (Q70.-)Q70.-
Q74.1code
Excludes1

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Instructional notes 5
Q74.1code
Inclusion terms
  • Congenital absence of patella
  • Congenital dislocation of patella
  • Congenital genu valgum
  • Congenital genu varum
  • Rudimentary patella
Index entries leading here 13
  • Absence (of) (organ or part) (complete or partial)
    • patella, congenital Q74.1
  • Agenesis
  • Anomaly, anomalous (congenital) (unspecified type) Q89.9
  • Bifid (congenital)
  • Biparta, bipartite
  • Genu
    • extrorsum (acquired) — see also Deformity, varus, knee
    • congenital Q74.1
    • valgum (acquired) (knock-knee) M21.06
    • varum (acquired) (bowleg) M21.16
    • introrsum (acquired) — see also Deformity, valgus, knee
  • Dislocation (articular)
  • Knock knee (acquired) M21.06
  • Malposition
    • congenital
  • Elongated, elongation (congenital) — see also Distortion
    • ligamentum patellae Q74.1
  • Hypertrophy, hypertrophic
    • meniscus, knee, congenital Q74.1
  • Hypoplasia, hypoplastic
  • Rudimentary (congenital) — see also Agenesis
Alongside this code 5 same parent — Q74
Q74.0 Oth congen malform of upper limb(s), inc shoulder girdle Q74.2 Oth congen malform of lower limb(s), including pelvic girdle Q74.3 Arthrogryposis multiplex congenita Q74.8 Other specified congenital malformations of limb(s) Q74.9 Unspecified congenital malformation of limb(s)
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
Q74
Block
Q65-Q79
Siblings
5

Present FY2024–FY2027.