S83.126D — Posterior dislocation of proximal end of tibia, unspecified knee, subsequent encounter
Is S83.126D billable?
Yes, but S83.126D is an unspecified code. S83.126D is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S83.126D is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting S83.126D — the more specific alternatives are listed below.
More specific alternatives
- S83.121DPosterior subluxation of proximal end of tibia, right knee, subsequent encounter
- S83.122DPosterior subluxation of proximal end of tibia, left knee, subsequent encounter
- S83.124DPosterior dislocation of proximal end of tibia, right knee, subsequent encounter
- S83.125DPosterior dislocation of proximal end of tibia, left knee, subsequent encounter
S83.126D at a glance
| Code | S83.126D |
|---|---|
| Description | Posterior dislocation of proximal end of tibia, unspecified knee, subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in S83.126D?
In S83.126D, the 7th character D means subsequent encounter. The 7th character is required for S83.126D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S83.126D group to?
S83.126D sits in MDC 23 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 949Aftercare with CC/MCCmedical
- 950Aftercare without CC/MCCmedical
How is S83.126D listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S83.12, the nearest indexed parent of S83.126D. Use them to find the family, then select the specific code.
- Dislocation › knee › proximal tibia › posteriorly (articular)
- Subluxation › knee › proximal tibia › posteriorly
Use additional code — inherited from Chapter 19
Report an additional code alongside S83.126D to fully describe the condition. S83.126D is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of S83.126D, but a patient may have both at the same time. When documentation supports it, S83.126D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S80-S89
The conditions below are not part of S83.126D, but a patient may have both at the same time. When documentation supports it, S83.126D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S83
The conditions below are not part of S83.126D, but a patient may have both at the same time. When documentation supports it, S83.126D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S83.1
The conditions below are not part of S83.126D, but a patient may have both at the same time. When documentation supports it, S83.126D and the excluded code may both be reported.
Code also — inherited from S83
Two codes may be needed to describe the condition fully. Whether S83.126D is sequenced first depends on the reason for the encounter.
- any associated open wound
How long has S83.126D existed?
S83.126D has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.