S56.391A

Other injury of extensor or abductor muscles, fascia and tendons of right thumb at forearm level, initial encounter

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 8 never code together

S56code

Excludes2

injury of muscle, fascia and tendon at or below wrist (S66.-)S66.-
sprain of joints and ligaments of elbow (S53.4-)S53.4-

S50-S59block

Excludes2

burns and corrosions (T20-T32)T20-T32
frostbite (T33-T34)T33-T34
injuries of wrist and hand (S60-S69)S60-S69
insect bite or sting, venomous (T63.4)T63.4

S00-T88chapter

Excludes2

birth trauma (P10-P15)P10-P15
obstetric trauma (O70-O71)O70-O71

Excludes2 — not included here, but the patient may have both. Code both when documented.

7th character 3

A initial encounter this code

D subsequent encounter

S sequela

Instructional notes 4

S56code

Code also

any associated open wound (S51.-)S51.-

S00-T88chapter

Notes

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)Z18.-

Index entries leading here 1

Injury T14.90
- muscle (and fascia) (and tendon)
  - thumb
    - abductor (forearm level) S56.30
      - specified type NEC S56.39
    - extensor (forearm level) S56.30
      - specified type NEC S56.39

Alongside this code 2 same parent — S56.391

S56.391D Inj extn/abdr musc/fasc/tend of r thm at forarm lv, subs S56.391S Inj extn/abdr musc/fasc/tend of r thm at forarm lv, sequela

Medications 2

2 Chemical and Drug Induced Liver Injury drugs 1 Chemical and Drug Induced Liver Injury, Chronic drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: S56.391
Block: S50-S59
Siblings: 2

Present FY2024–FY2027.