S82.146Q Nondisplaced bicondylar fracture of unspecified tibia, subsequent encounter for open fracture type I or II with malunion
Billable ICD-10-CM code, FY2026.
Built from S82.146 with 7th character Q (subsequent encounter for open fracture type I or II with malunion).
Applies from S82 Fracture of lower leg, including ankle
Includes
fracture of malleolus
Excludes1 (never code together)
traumatic amputation of lower leg (S88.-)
Excludes2 (not included here)
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-)
7th character note
The appropriate 7th character is to be added to all codes from category S82
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 S82.1 Fracture of upper end of tibia
Applicable to
Fracture of proximal end of tibia
Excludes2 (not included here)
fracture of shaft of tibia (S82.2-)
physeal fracture of upper end of tibia (S89.0-)
Applies from S82.14 Bicondylar fracture of tibia
Applicable to
Fracture of tibial plateau NOS
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 S82.146Q
Back-references to S82
Type 2 Excludes: M23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")