`S82.852B` Displaced trimalleolar fracture of left lower leg, initial encounter for open fracture type I or II

Billable ICD-10-CM code, FY2026.

Built from S82.852 with 7th character B (initial encounter for open fracture type I or II).

fracture of foot, except ankle (S92.-)
periprosthetic fracture around internal prosthetic ankle joint (M97.2)
periprosthetic fracture around internal prosthetic implant of knee joint (M97.1-)

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

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

Code annotations containing back-references to S82.852B

Type 1 Excludes: S82.3 Fracture of lower end of tibia ("trimalleolar fractures of lower leg (S82.85-)")

Type 2 Excludes: M23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")
Type 1 Excludes: M84.3 Stress fracture ("traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)")
Type 1 Excludes: M84.4 Pathological fracture, not elsewhere classified ("traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)")
Type 2 Excludes: S72 Fracture of femur ("fracture of lower leg and ankle (S82.-)")
Type 1 Excludes: S81 Open wound of knee and lower leg ("open fracture of knee and lower leg (S82.-)")
Type 2 Excludes: S92 Fracture of foot and toe, except ankle ("fracture of ankle (S82.-)")
Type 2 Excludes: S92 Fracture of foot and toe, except ankle ("fracture of malleolus (S82.-)")

S82.851Q Displaced trimalleolar fracture of right lower leg, subsequent encounter for open fracture type I or II with malunion
S82.851R Displaced trimalleolar fracture of right lower leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
S82.851S Displaced trimalleolar fracture of right lower leg, sequela
S82.852 Displaced trimalleolar fracture of left lower leg
S82.852A Displaced trimalleolar fracture of left lower leg, initial encounter for closed fracture
S82.852B Displaced trimalleolar fracture of left lower leg, initial encounter for open fracture type I or II (this code)
S82.852C Displaced trimalleolar fracture of left lower leg, initial encounter for open fracture type IIIA, IIIB, or IIIC
S82.852D Displaced trimalleolar fracture of left lower leg, subsequent encounter for closed fracture with routine healing
S82.852E Displaced trimalleolar fracture of left lower leg, subsequent encounter for open fracture type I or II with routine healing
S82.852F Displaced trimalleolar fracture of left lower leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
S82.852G Displaced trimalleolar fracture of left lower leg, subsequent encounter for closed fracture with delayed healing