ICD-10-CM · FY 2026 APRIL UPDATE

S66.12

Laceration of flexor muscle, fascia and tendon of other and unspecified finger 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
S66.120	Laceration of flexor muscle, fascia and tendon of right index finger at wrist and hand level	Category
S66.120A	Laceration of flexor muscle, fascia and tendon of right index finger at wrist and hand level, initial encounter	Billable
S66.120D	Laceration of flexor muscle, fascia and tendon of right index finger at wrist and hand level, subsequent encounter	Billable
S66.120S	Laceration of flexor muscle, fascia and tendon of right index finger at wrist and hand level, sequela	Billable
S66.121	Laceration of flexor muscle, fascia and tendon of left index finger at wrist and hand level	Category
S66.121A	Laceration of flexor muscle, fascia and tendon of left index finger at wrist and hand level, initial encounter	Billable
S66.121D	Laceration of flexor muscle, fascia and tendon of left index finger at wrist and hand level, subsequent encounter	Billable
S66.121S	Laceration of flexor muscle, fascia and tendon of left index finger at wrist and hand level, sequela	Billable
S66.122	Laceration of flexor muscle, fascia and tendon of right middle finger at wrist and hand level	Category
S66.122A	Laceration of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, initial encounter	Billable
S66.122D	Laceration of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, subsequent encounter	Billable
S66.122S	Laceration of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, sequela	Billable
S66.123	Laceration of flexor muscle, fascia and tendon of left middle finger at wrist and hand level	Category
S66.123A	Laceration of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, initial encounter	Billable
S66.123D	Laceration of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, subsequent encounter	Billable
S66.123S	Laceration of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, sequela	Billable
S66.124	Laceration of flexor muscle, fascia and tendon of right ring finger at wrist and hand level	Category
S66.124A	Laceration of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, initial encounter	Billable
S66.124D	Laceration of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, subsequent encounter	Billable
S66.124S	Laceration of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, sequela	Billable
S66.125	Laceration of flexor muscle, fascia and tendon of left ring finger at wrist and hand level	Category
S66.125A	Laceration of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, initial encounter	Billable
S66.125D	Laceration of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, subsequent encounter	Billable
S66.125S	Laceration of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, sequela	Billable
S66.126	Laceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level	Category
S66.126A	Laceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level, initial encounter	Billable
S66.126D	Laceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter	Billable
S66.126S	Laceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level, sequela	Billable
S66.127	Laceration of flexor muscle, fascia and tendon of left little finger at wrist and hand level	Category
S66.127A	Laceration of flexor muscle, fascia and tendon of left little finger at wrist and hand level, initial 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.