ICD-10-CM · FY 2026 APRIL UPDATE

S56.4

Injury of extensor muscle, fascia and tendon of other and unspecified finger 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
S56.40	Unspecified injury of extensor muscle, fascia and tendon of other and unspecified finger at forearm level	Category
S56.401	Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level	Category
S56.401A	Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level, initial encounter	Billable
S56.401D	Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level, subsequent encounter	Billable
S56.401S	Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm level, sequela	Billable
S56.402	Unspecified injury of extensor muscle, fascia and tendon of left index finger at forearm level	Category
S56.402A	Unspecified injury of extensor muscle, fascia and tendon of left index finger at forearm level, initial encounter	Billable
S56.402D	Unspecified injury of extensor muscle, fascia and tendon of left index finger at forearm level, subsequent encounter	Billable
S56.402S	Unspecified injury of extensor muscle, fascia and tendon of left index finger at forearm level, sequela	Billable
S56.403	Unspecified injury of extensor muscle, fascia and tendon of right middle finger at forearm level	Category
S56.403A	Unspecified injury of extensor muscle, fascia and tendon of right middle finger at forearm level, initial encounter	Billable
S56.403D	Unspecified injury of extensor muscle, fascia and tendon of right middle finger at forearm level, subsequent encounter	Billable
S56.403S	Unspecified injury of extensor muscle, fascia and tendon of right middle finger at forearm level, sequela	Billable
S56.404	Unspecified injury of extensor muscle, fascia and tendon of left middle finger at forearm level	Category
S56.404A	Unspecified injury of extensor muscle, fascia and tendon of left middle finger at forearm level, initial encounter	Billable
S56.404D	Unspecified injury of extensor muscle, fascia and tendon of left middle finger at forearm level, subsequent encounter	Billable
S56.404S	Unspecified injury of extensor muscle, fascia and tendon of left middle finger at forearm level, sequela	Billable
S56.405	Unspecified injury of extensor muscle, fascia and tendon of right ring finger at forearm level	Category
S56.405A	Unspecified injury of extensor muscle, fascia and tendon of right ring finger at forearm level, initial encounter	Billable
S56.405D	Unspecified injury of extensor muscle, fascia and tendon of right ring finger at forearm level, subsequent encounter	Billable
S56.405S	Unspecified injury of extensor muscle, fascia and tendon of right ring finger at forearm level, sequela	Billable
S56.406	Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level	Category
S56.406A	Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level, initial encounter	Billable
S56.406D	Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level, subsequent encounter	Billable
S56.406S	Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm level, sequela	Billable
S56.407	Unspecified injury of extensor muscle, fascia and tendon of right little finger at forearm level	Category
S56.407A	Unspecified injury of extensor muscle, fascia and tendon of right little finger at forearm level, initial encounter	Billable
S56.407D	Unspecified injury of extensor muscle, fascia and tendon of right little finger at forearm level, subsequent encounter	Billable
S56.407S	Unspecified injury of extensor muscle, fascia and tendon of right little finger at forearm level, sequela	Billable
S56.408	Unspecified injury of extensor muscle, fascia and tendon of left little finger at forearm level	Category

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.