S56.491A — Other injury of extensor muscle, fascia and tendon of right index finger at forearm level, initial encounter
Is S56.491A billable?
Yes — S56.491A is billable for FY2027. S56.491A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S56.491A may be submitted for encounters from October 1, 2026 through September 30, 2027.
S56.491A at a glance
| Code | S56.491A |
|---|---|
| Description | Other injury of extensor muscle, fascia and tendon of right index finger at forearm level, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in S56.491A?
In S56.491A, the 7th character A means initial encounter. The 7th character is required for S56.491A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S56.491A group to?
S56.491A sits in MDC 21 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.
- 913Traumatic Injury with MCCmedical
- 914Traumatic Injury without MCCmedical
How is S56.491A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S56.49, the nearest indexed parent of S56.491A. Use them to find the family, then select the specific code.
- Injury › muscle › finger › little › extensor › specified type NEC
- Injury › muscle › finger › middle › extensor › specified type NEC
- Injury › muscle › finger › ring › extensor › specified type NEC
Use additional code — inherited from Chapter 19
Report an additional code alongside S56.491A to fully describe the condition. S56.491A 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 S56.491A, but a patient may have both at the same time. When documentation supports it, S56.491A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S50-S59
The conditions below are not part of S56.491A, but a patient may have both at the same time. When documentation supports it, S56.491A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S56
The conditions below are not part of S56.491A, but a patient may have both at the same time. When documentation supports it, S56.491A and the excluded code may both be reported.
Code also — inherited from S56
Two codes may be needed to describe the condition fully. Whether S56.491A is sequenced first depends on the reason for the encounter.
- any associated open wound (S51.-)
How long has S56.491A existed?
S56.491A 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.