S66.49

Other specified injury of intrinsic muscle, fascia and tendon of thumb 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
S66.491	Other specified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level	Category
S66.491A	Other specified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level, initial encounter	Billable
S66.491D	Other specified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level, subsequent encounter	Billable
S66.491S	Other specified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level, sequela	Billable
S66.492	Other specified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level	Category
S66.492A	Other specified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level, initial encounter	Billable
S66.492D	Other specified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level, subsequent encounter	Billable
S66.492S	Other specified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level, sequela	Billable
S66.499	Other specified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level	Category
S66.499A	Other specified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level, initial encounter	Billable
S66.499D	Other specified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level, subsequent encounter	Billable
S66.499S	Other specified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level, sequela	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.