S72.409C Unspecified fracture of lower end of unspecified femur, initial encounter for open fracture type IIIA, IIIB, or IIIC
Billable ICD-10-CM code, FY2026.
Built from S72.409 with 7th character C (initial encounter for open fracture type IIIA, IIIB, or IIIC).
Applies from S72 Fracture of femur
Excludes1 (never code together)
traumatic amputation of hip and thigh (S78.-)
Excludes2 (not included here)
fracture of lower leg and ankle (S82.-)
fracture of foot (S92.-)
periprosthetic fracture of prosthetic implant of hip (M97.0-)
7th character note
The appropriate 7th character is to be added to all codes from category S72
Notes
A fracture not indicated as displaced or nondisplaced should be coded to displaced
A fracture not indicated as open or closed should be coded to closed
The open fracture designations are based on the Gustilo open fracture classification
7th character required
A — initial encounter for closed fracture
B — initial encounter for open fracture type I or II
C — initial encounter for open fracture type IIIA, IIIB, or IIIC
D — subsequent encounter for closed fracture with routine healing
E — subsequent encounter for open fracture type I or II with routine healing
F — subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
G — subsequent encounter for closed fracture with delayed healing
H — subsequent encounter for open fracture type I or II with delayed healing
J — subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
K — subsequent encounter for closed fracture with nonunion
M — subsequent encounter for open fracture type I or II with nonunion
N — subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
P — subsequent encounter for closed fracture with malunion
Q — subsequent encounter for open fracture type I or II with malunion
R — subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
S — sequela
Applies from S72.4 Fracture of lower end of femur
Applicable to
Fracture of distal end of femur
Excludes2 (not included here)
fracture of shaft of femur (S72.3-)
physeal fracture of lower end of femur (S79.1-)
Risk adjustment (HCC)
CMS-HCC V28: HCC 402 — Hip Fracture/Dislocation
CMS-HCC V22: HCC 170 — Hip Fracture/Dislocation
ESRD V24: HCC 170
Medicare Code Edits (MCE v43.1 (April 2026))
Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.
Code annotations containing back-references to S72.409C