S79.1Physeal fracture of lower end of femur

S79.1 is the ICD-10-CM diagnosis code for physeal fracture of lower end of femur. It belongs to category S79 (other and unspecified injuries of hip and thigh), block S70-S79 (injuries to the hip and thigh) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within S79 (other and unspecified injuries of hip and thigh), S79.1 is specifically for physeal fracture of lower end of femur. Related codes cover physeal fracture of upper end of femur (S79.0), other specified injuries of hip and thigh (S79.8) and unspecified injury of hip and thigh (S79.9).

Codes in this range require a 7th character: A for initial encounter for closed fracture, D for subsequent encounter for fracture with routine healing, G for subsequent encounter for fracture with delayed healing, K for subsequent encounter for fracture with nonunion, P for subsequent encounter for fracture with malunion 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.