Lobster-claw hand, unspecified hand

This code describes a congenital malformation of the hand characterized by a deep central cleft that divides the hand into two parts, resembling a lobster's claw. It typically involves the absence or fusion of central digits, most commonly the third and fourth fingers, and can range in severity from mild notching to complete absence of central rays. This condition is also known as ectrodactyly.

Use this code when documentation specifies a diagnosis of lobster-claw hand without further detail regarding laterality (left or right). This code is appropriate for initial encounters where the specific hand affected has not yet been identified or when the condition affects both hands but the documentation does not specify bilateral involvement.

• Always seek clarification from the provider if the laterality of the lobster-claw hand is not documented.
• Avoid using this unspecified code if documentation clearly indicates left (Q71.61) or right (Q71.62) hand involvement.
• Consider associated congenital anomalies, as ectrodactyly can be part of various syndromes (e.g., EEC syndrome), and code those conditions separately if documented.