ICD-10 code for Surfer knot

The ICD-10-CM code for Surfer knot is S89.8 (Other specified injuries of lower leg).

Within S89, choose S89.8 (Other specified injuries of lower leg) only when documentation doesn't support a more specific option: physeal fracture of upper end of tibia (S89.0), physeal fracture of lower end of tibia (S89.1), physeal fracture of upper end of fibula (S89.2), physeal fracture of lower end of fibula (S89.3) and unspecified injury of lower leg (S89.9).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

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