ICD-10-CM · FY 2026 APRIL UPDATE

S56.0

Injury of flexor muscle, fascia and tendon of thumb at forearm 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
S56.00	Unspecified injury of flexor muscle, fascia and tendon of thumb at forearm level	Category
S56.001	Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level	Category
S56.001A	Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level, initial encounter	Billable
S56.001D	Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level, subsequent encounter	Billable
S56.001S	Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level, sequela	Billable
S56.002	Unspecified injury of flexor muscle, fascia and tendon of left thumb at forearm level	Category
S56.002A	Unspecified injury of flexor muscle, fascia and tendon of left thumb at forearm level, initial encounter	Billable
S56.002D	Unspecified injury of flexor muscle, fascia and tendon of left thumb at forearm level, subsequent encounter	Billable
S56.002S	Unspecified injury of flexor muscle, fascia and tendon of left thumb at forearm level, sequela	Billable
S56.009	Unspecified injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level	Category
S56.009A	Unspecified injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level, initial encounter	Billable
S56.009D	Unspecified injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level, subsequent encounter	Billable
S56.009S	Unspecified injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level, sequela	Billable
S56.01	Strain of flexor muscle, fascia and tendon of thumb at forearm level	Category
S56.011	Strain of flexor muscle, fascia and tendon of right thumb at forearm level	Category
S56.011A	Strain of flexor muscle, fascia and tendon of right thumb at forearm level, initial encounter	Billable
S56.011D	Strain of flexor muscle, fascia and tendon of right thumb at forearm level, subsequent encounter	Billable
S56.011S	Strain of flexor muscle, fascia and tendon of right thumb at forearm level, sequela	Billable
S56.012	Strain of flexor muscle, fascia and tendon of left thumb at forearm level	Category
S56.012A	Strain of flexor muscle, fascia and tendon of left thumb at forearm level, initial encounter	Billable
S56.012D	Strain of flexor muscle, fascia and tendon of left thumb at forearm level, subsequent encounter	Billable
S56.012S	Strain of flexor muscle, fascia and tendon of left thumb at forearm level, sequela	Billable
S56.019	Strain of flexor muscle, fascia and tendon of unspecified thumb at forearm level	Category
S56.019A	Strain of flexor muscle, fascia and tendon of unspecified thumb at forearm level, initial encounter	Billable
S56.019D	Strain of flexor muscle, fascia and tendon of unspecified thumb at forearm level, subsequent encounter	Billable
S56.019S	Strain of flexor muscle, fascia and tendon of unspecified thumb at forearm level, sequela	Billable
S56.02	Laceration of flexor muscle, fascia and tendon of thumb at forearm level	Category
S56.021	Laceration of flexor muscle, fascia and tendon of right thumb at forearm level	Category
S56.021A	Laceration of flexor muscle, fascia and tendon of right thumb at forearm level, initial encounter	Billable
S56.021D	Laceration of flexor muscle, fascia and tendon of right thumb at forearm level, 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.