S56.399
S56.399 — Other injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level
Non-billable headerICD-10-CM
S56.399 is a non-billable header ICD-10-CM code for other injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category S56
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
S56.399 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 to one of these instead S56.399
3 child codes. Green means billable.
- S56.399AOther injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, initial encounter
- S56.399DOther injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, subsequent encounter
- S56.399SOther injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, sequela
Related codes at this level
Codes that share S56.39. If S56.399 is not quite right, the correct code is usually one of these.
Questions about S56.399
- Is S56.399 a billable ICD-10-CM code?
- No. S56.399 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does S56.399 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the elbow and forearm (S50-S59).