S56.099D — Other injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level, subsequent encounter
Is S56.099D billable?
Yes, but S56.099D is an unspecified code. S56.099D is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S56.099D 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 S56.099D — the more specific alternatives are listed below.
S56.099D at a glance
| Code | S56.099D |
|---|---|
| Description | Other injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level, 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 S56.099D?
In S56.099D, the 7th character D means subsequent encounter. The 7th character is required for S56.099D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S56.099D group to?
S56.099D 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 S56.099D listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S56.09, the nearest indexed parent of S56.099D. Use them to find the family, then select the specific code.
- Injury › muscle › thumb › flexor › specified type NEC
Use additional code — inherited from Chapter 19
Report an additional code alongside S56.099D to fully describe the condition. S56.099D 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 S56.099D, but a patient may have both at the same time. When documentation supports it, S56.099D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S50-S59
The conditions below are not part of S56.099D, but a patient may have both at the same time. When documentation supports it, S56.099D and the excluded code may both be reported.
Excludes2 — not included here — inherited from S56
The conditions below are not part of S56.099D, but a patient may have both at the same time. When documentation supports it, S56.099D and the excluded code may both be reported.
Code also — inherited from S56
Two codes may be needed to describe the condition fully. Whether S56.099D is sequenced first depends on the reason for the encounter.
- any associated open wound (S51.-)
How long has S56.099D existed?
S56.099D 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.