S86.999D — Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
Is S86.999D billable?
Yes, but S86.999D is an unspecified code. S86.999D is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S86.999D 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 S86.999D — the more specific alternatives are listed below.
More specific alternatives
- S86.001DUnspecified injury of right Achilles tendon, subsequent encounter
- S86.101DUnspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, subsequent encounter
- S86.201DUnspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter
- S86.301DUnspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, subsequent encounter
- S86.801DUnspecified injury of other muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
S86.999D at a glance
| Code | S86.999D |
|---|---|
| Description | Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, 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 S86.999D?
In S86.999D, the 7th character D means subsequent encounter. The 7th character is required for S86.999D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S86.999D group to?
S86.999D 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 S86.999D listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S86.99, the nearest indexed parent of S86.999D. Use them to find the family, then select the specific code.
- Injury › muscle › leg › specified › type NEC
Use additional code — inherited from Chapter 19
Report an additional code alongside S86.999D to fully describe the condition. S86.999D 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 S86.999D, but a patient may have both at the same time. When documentation supports it, S86.999D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S80-S89
The conditions below are not part of S86.999D, but a patient may have both at the same time. When documentation supports it, S86.999D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S86
The conditions below are not part of S86.999D, but a patient may have both at the same time. When documentation supports it, S86.999D and the excluded code may both be reported.
Code also — inherited from S86
Two codes may be needed to describe the condition fully. Whether S86.999D is sequenced first depends on the reason for the encounter.
- any associated open wound (S81.-)
How long has S86.999D existed?
S86.999D 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.