S82.85 – Trimalleolar fracture of lower leg
ICD-10-CM 2027 diagnosis code · Injuries to the knee and lower leg
- Code
S82.85(claims format:S8285)- Description
- Trimalleolar fracture of lower leg
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
- Block
- S80-S89 Injuries to the knee and lower leg
- Parent codes
- S82 › S82.8
Billable codes under S82.85
S82.85 is a header code and cannot be used on claims. Choose the most specific code:
- S82.851 – Displaced trimalleolar fracture of right lower legHeader (more codes below)
- S82.852 – Displaced trimalleolar fracture of left lower legHeader (more codes below)
- S82.853 – Displaced trimalleolar fracture of unspecified lower legHeader (more codes below)
- S82.854 – Nondisplaced trimalleolar fracture of right lower legHeader (more codes below)
- S82.855 – Nondisplaced trimalleolar fracture of left lower legHeader (more codes below)
- S82.856 – Nondisplaced trimalleolar fracture of unspecified lower legHeader (more codes below)
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).
| Character | Meaning |
|---|---|
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 |
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
S82 – Fracture of lower leg, including ankle
- fracture of malleolus
- traumatic amputation of lower leg (S88.-)
- 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
- The appropriate 7th character is to be added to all codes from category S82
Block S80-S89
Index terms for S82.85
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in S82.8
- S82.81 – Torus fracture of upper end of fibulaHeader
- S82.82 – Torus fracture of lower end of fibulaHeader
- S82.83 – Other fracture of upper and lower end of fibulaHeader
- S82.84 – Bimalleolar fracture of lower legHeader
- S82.86 – Maisonneuve's fractureHeader
- S82.87 – Pilon fracture of tibiaHeader
- S82.89 – Other fractures of lower legHeader
Frequently asked questions
What is ICD-10 code S82.85?
S82.85 is the ICD-10-CM code for trimalleolar fracture of lower leg, in the block S80-S89 (Injuries to the knee and lower leg).
Is S82.85 a billable code?
No. S82.85 is a header code with more specific child codes; report one of the billable codes listed above.
What category does S82.85 belong to?
It belongs to category S82 – Fracture of lower leg, including ankle.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.