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S66.329

Laceration of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level

Not billable — category only FY2026 2025-10-01 → 2026-09-30

This is the unspecified option. 9 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.

Exclusions 7 never code together

Excludes2

Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level (S66.2-)S66.2-

S66code

Excludes2

sprain of joints and ligaments of wrist and hand (S63.-)S63.-

Excludes2

burns and corrosions (T20-T32)T20-T32
frostbite (T33-T34)T33-T34
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

D subsequent encounter

S sequela

Instructional notes 4

S66code

Code also

any associated open wound (S61.-)S61.-

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)
  - finger
    - extensor (forearm level) S56.40
      - hand level S66.309
        
        laceration S66.329
    - index
      - extensor (forearm level)
        
        hand level S66.308
        
        laceration S66.32
    - little
      - extensor (forearm level)
        
        hand level S66.30
        
        laceration S66.32
    - middle
      - extensor (forearm level)
        
        hand level S66.30
        
        laceration S66.32
    - ring
      - extensor (forearm level)
        
        hand level S66.30
        
        laceration S66.32

Alongside this code 9 same parent — S66.32

S66.320 Lacerat extensor musc/fasc/tend r idx fngr at wrs/hnd lv category S66.321 Lacerat extensor musc/fasc/tend l idx fngr at wrs/hnd lv category S66.322 Lacerat extensor musc/fasc/tend r mid finger at wrs/hnd lv category S66.323 Lacerat extensor musc/fasc/tend l mid finger at wrs/hnd lv category S66.324 Lacerat extensor musc/fasc/tend r rng fngr at wrs/hnd lv category S66.325 Lacerat extensor musc/fasc/tend l rng fngr at wrs/hnd lv category S66.326 Lacerat extn musc/fasc/tend r little finger at wrs/hnd lv category S66.327 Lacerat extn musc/fasc/tend l little finger at wrs/hnd lv category S66.328 Laceration of extensor musc/fasc/tend finger at wrs/hnd lv category

Subordinate codes 3

S66.329A Lacerat extn musc/fasc/tend unsp finger at wrs/hnd lv, init S66.329D Lacerat extn musc/fasc/tend unsp finger at wrs/hnd lv, subs S66.329S Lacerat extn musc/fasc/tend unsp finger at wrs/hnd lv, sqla

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: no
Code set: FY2026
Parent: S66.32
Block: S60-S69
Siblings: 9
Subordinate: 3

Present FY2024–FY2027.