Q71.4Longitudinal reduction defect of radius

Q71.4 is the ICD-10-CM diagnosis code for longitudinal reduction defect of radius. It belongs to category Q71 (reduction defects of upper limb), block Q65-Q79 (congenital malformations and deformations of the musculoskeletal system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within Q71 (reduction defects of upper limb), Q71.4 is specifically for longitudinal reduction defect of radius. Related codes cover congenital complete absence of upper limb (Q71.0), congenital absence of upper arm and forearm with hand present (Q71.1), congenital absence of both forearm and hand (Q71.2), congenital absence of hand and finger (Q71.3), longitudinal reduction defect of ulna (Q71.5), Lobster-claw hand (Q71.6), other reduction defects of upper limb (Q71.8) and unspecified reduction defect of upper limb (Q71.9).

To report this condition, pick the subcode that matches the documentation: Q71.40 (radius), Q71.41 (radius), Q71.42 (radius) and Q71.43 (bilateral).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.