ICD-10-CM · FY 2026 APRIL UPDATE

S66.8

Injury of other specified muscles, fascia and tendons at wrist and hand level

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027

SourceCMS ICD-10-CM order file

ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODE	DESCRIPTION	TYPE
S66.80	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level	Category
S66.801	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand	Category
S66.801A	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand, initial encounter	Billable
S66.801D	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand, subsequent encounter	Billable
S66.801S	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand, sequela	Billable
S66.802	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, left hand	Category
S66.802A	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, left hand, initial encounter	Billable
S66.802D	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, left hand, subsequent encounter	Billable
S66.802S	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, left hand, sequela	Billable
S66.809	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand	Category
S66.809A	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, initial encounter	Billable
S66.809D	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, subsequent encounter	Billable
S66.809S	Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, sequela	Billable
S66.81	Strain of other specified muscles, fascia and tendons at wrist and hand level	Category
S66.811	Strain of other specified muscles, fascia and tendons at wrist and hand level, right hand	Category
S66.811A	Strain of other specified muscles, fascia and tendons at wrist and hand level, right hand, initial encounter	Billable
S66.811D	Strain of other specified muscles, fascia and tendons at wrist and hand level, right hand, subsequent encounter	Billable
S66.811S	Strain of other specified muscles, fascia and tendons at wrist and hand level, right hand, sequela	Billable
S66.812	Strain of other specified muscles, fascia and tendons at wrist and hand level, left hand	Category
S66.812A	Strain of other specified muscles, fascia and tendons at wrist and hand level, left hand, initial encounter	Billable
S66.812D	Strain of other specified muscles, fascia and tendons at wrist and hand level, left hand, subsequent encounter	Billable
S66.812S	Strain of other specified muscles, fascia and tendons at wrist and hand level, left hand, sequela	Billable
S66.819	Strain of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand	Category
S66.819A	Strain of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, initial encounter	Billable
S66.819D	Strain of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, subsequent encounter	Billable
S66.819S	Strain of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, sequela	Billable
S66.82	Laceration of other specified muscles, fascia and tendons at wrist and hand level	Category
S66.821	Laceration of other specified muscles, fascia and tendons at wrist and hand level, right hand	Category
S66.821A	Laceration of other specified muscles, fascia and tendons at wrist and hand level, right hand, initial encounter	Billable
S66.821D	Laceration of other specified muscles, fascia and tendons at wrist and hand level, right hand, subsequent encounter	Billable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.