S82.856M — Nondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type I or II with nonunion
S82.856M is a billable, specific ICD-10-CM code for nondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type i or ii with nonunion. It is valid for submission on a claim.
7th character "M" — subsequent encounter for open fracture type I or II with nonunion
The appropriate 7th character is to be added to all codes from category S82
- 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
Excludes1 inherited from the categories above S82.856M
These are not written on S82.856M, but they bind it: a note on a category applies to every code beneath it. Billing S82.856M with anything listed here is a denial.
Excludes2 inherited from the categories above S82.856M
Also inherited, and the opposite of Excludes1: these conditions are not part of S82.856M, but a patient can have both, so you may code both.
Other codes that can never be billed with S82.856M
These codes carry an Excludes1 note pointing at S82.856M. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S82.856M alone.
Risk adjustment
S82.856M does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
S82.856M has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share S82.856. If S82.856M is not quite right, the correct code is usually one of these.
- S82.856ANondisplaced trimalleolar fracture of unspecified lower leg, initial encounter for closed fracture
- S82.856BNondisplaced trimalleolar fracture of unspecified lower leg, initial encounter for open fracture type I or II
- S82.856CNondisplaced trimalleolar fracture of unspecified lower leg, initial encounter for open fracture type IIIA, IIIB, or IIIC
- S82.856DNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for closed fracture with routine healing
- S82.856ENondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type I or II with routine healing
- S82.856FNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
- S82.856GNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for closed fracture with delayed healing
- S82.856HNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type I or II with delayed healing
- S82.856JNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
- S82.856KNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for closed fracture with nonunion
- S82.856NNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
- S82.856PNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for closed fracture with malunion
- S82.856QNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type I or II with malunion
- S82.856RNondisplaced trimalleolar fracture of unspecified lower leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
- S82.856SNondisplaced trimalleolar fracture of unspecified lower leg, sequela
Questions about S82.856M
- Is S82.856M a billable ICD-10-CM code?
- Yes. S82.856M is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S82.856M sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the knee and lower leg (S80-S89).
- What cannot be coded together with S82.856M?
- S82.856M carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S82.856M (S82) and apply to it just the same.