S66.301DBillable

Unspecified injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level, subsequent encounter

Short description: Unsp inj extn musc/fasc/tend l idx fngr at wrs/hnd lv, subs

Chapter: 19. Injury, poisoning and certain other consequences of external causes
Category: S66
Effective date: October 1, 2026

Related codes in category S66

S66Injury of muscle, fascia and tendon at wrist and hand level S66.0Injury of long flexor musc/fasc/tend thumb at wrs/hnd lv S66.00Unsp inj long flexor musc/fasc/tend thumb at wrs/hnd lv S66.001Unsp inj long flexor musc/fasc/tend r thm at wrs/hnd lv S66.001AUnsp inj long flxr musc/fasc/tend r thm at wrs/hnd lv, initYes S66.001DUnsp inj long flxr musc/fasc/tend r thm at wrs/hnd lv, subsYes S66.001SUnsp inj long flxr musc/fasc/tend r thm at wrs/hnd lv, sqlaYes S66.002Unsp inj long flexor musc/fasc/tend l thm at wrs/hnd lv S66.002AUnsp inj long flxr musc/fasc/tend l thm at wrs/hnd lv, initYes S66.002DUnsp inj long flxr musc/fasc/tend l thm at wrs/hnd lv, subsYes S66.002SUnsp inj long flxr musc/fasc/tend l thm at wrs/hnd lv, sqlaYes S66.009Unsp injury of long flexor musc/fasc/tend thmb at wrs/hnd lv

Frequently asked questions

What is ICD-10 code S66.301D?

S66.301D is an ICD-10-CM diagnosis code for Unspecified injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level, subsequent encounter.

Is S66.301D a billable code?

Yes. S66.301D is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is S66.301D in?

S66.301D falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.

When did S66.301D become effective?

S66.301D has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to S66.301D?

S66.301D belongs to category S66, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.