All ICD10 Codes
Chapter 17

Q00–Q99: Congenital Malformations, Deformations and Chromosomal Abnormalities

Congenital Malformations, Deformations and Chromosomal Abnormalities diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)
All CodesBillable Only
Internal Codes
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  • Q70.23—

    Fused toes, bilateral

  • Q70.30—

    Webbed toes, unspecified foot

  • Q70.31—

    Webbed toes, right foot

  • Q70.32—

    Webbed toes, left foot

  • Q70.33—

    Webbed toes, bilateral

  • Q70.4—

    Polysyndactyly, unspecified

  • Q70.9—

    Syndactyly, unspecified

  • Q71.00—

    Congenital complete absence of unspecified upper limb

  • Q71.01—

    Congenital complete absence of right upper limb

  • Q71.02—

    Congenital complete absence of left upper limb

  • Q71.03—

    Congenital complete absence of upper limb, bilateral

  • Q71.10—

    Congenital absence of unspecified upper arm and forearm with hand present

  • Q71.11—

    Congenital absence of right upper arm and forearm with hand present

  • Q71.12—

    Congenital absence of left upper arm and forearm with hand present

  • Q71.13—

    Congenital absence of upper arm and forearm with hand present, bilateral

  • Q71.20—

    Congenital absence of both forearm and hand, unspecified upper limb

  • Q71.21—

    Congenital absence of both forearm and hand, right upper limb

  • Q71.22—

    Congenital absence of both forearm and hand, left upper limb

  • Q71.23—

    Congenital absence of both forearm and hand, bilateral

  • Q71.30—

    Congenital absence of unspecified hand and finger

  • Q71.31—

    Congenital absence of right hand and finger

  • Q71.32—

    Congenital absence of left hand and finger

  • Q71.33—

    Congenital absence of hand and finger, bilateral

  • Q71.40—

    Longitudinal reduction defect of unspecified radius

  • Q71.41—

    Longitudinal reduction defect of right radius

  • Q71.42—

    Longitudinal reduction defect of left radius

  • Q71.43—

    Longitudinal reduction defect of radius, bilateral

  • Q71.50—

    Longitudinal reduction defect of unspecified ulna

  • Q71.51—

    Longitudinal reduction defect of right ulna

  • Q71.52—

    Longitudinal reduction defect of left ulna

  • Q71.53—

    Longitudinal reduction defect of ulna, bilateral

  • Q71.60—

    Lobster-claw hand, unspecified hand

  • Q71.61—

    Lobster-claw right hand

  • Q71.62—

    Lobster-claw left hand

  • Q71.63—

    Lobster-claw hand, bilateral

  • Q71.811—

    Congenital shortening of right upper limb

  • Q71.812—

    Congenital shortening of left upper limb

  • Q71.813—

    Congenital shortening of upper limb, bilateral

  • Q71.819—

    Congenital shortening of unspecified upper limb

  • Q71.891—

    Other reduction defects of right upper limb

  • Q71.892—

    Other reduction defects of left upper limb

  • Q71.893—

    Other reduction defects of upper limb, bilateral

  • Q71.899—

    Other reduction defects of unspecified upper limb

  • Q71.90—

    Unspecified reduction defect of unspecified upper limb

  • Q71.91—

    Unspecified reduction defect of right upper limb

  • Q71.92—

    Unspecified reduction defect of left upper limb

  • Q71.93—

    Unspecified reduction defect of upper limb, bilateral

  • Q72.00—

    Congenital complete absence of unspecified lower limb

  • Q72.01—

    Congenital complete absence of right lower limb

  • Q72.02—

    Congenital complete absence of left lower limb

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