S56.3
Injury of extensor or abductor muscles, fascia and tendons of thumb at forearm level
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 8 never code together
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 4
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 filed at null
No alphabetic index entry points at this code.
Alongside this code 7 same parent — S56
S56.0 Injury of flexor musc/fasc/tend thumb at forearm level category S56.1 Injury of flexor musc/fasc/tend and unsp finger at forarm lv category S56.2 Injury of flexor muscle, fascia and tendon at forearm level category S56.4 Inj extensor musc/fasc/tend and unsp finger at forarm lv category S56.5 Injury of extn musc/fasc/tend at forearm level category S56.8 Injury of other muscles, fascia and tendons at forearm level category S56.9 Injury of unsp muscles, fascia and tendons at forearm level category
Subordinate codes 4
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.