ICD10Check
CheckerBrowseOpen

S66.59

⚠ Non-billable (Header)

Other injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level

Injury, poisoning and certain other consequences of external causes (S00-T88)

⚠️ This is a category header code — not billable. Use a more specific child code below.

Check This Code

⚠️ Excludes2

inherited

Rules inherited from parent codes.

S66.5
  • • injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level (S66.4-)
S66
  • • sprain of joints and ligaments of wrist and hand (S63.-)

Child Codes (10)

S66.590Other injury of intrinsic muscle, fascia and tendon of right index finger at wrist and hand levelS66.591Other injury of intrinsic muscle, fascia and tendon of left index finger at wrist and hand levelS66.592Other injury of intrinsic muscle, fascia and tendon of right middle finger at wrist and hand levelS66.593Other injury of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand levelS66.594Other injury of intrinsic muscle, fascia and tendon of right ring finger at wrist and hand levelS66.595Other injury of intrinsic muscle, fascia and tendon of left ring finger at wrist and hand levelS66.596Other injury of intrinsic muscle, fascia and tendon of right little finger at wrist and hand levelS66.597Other injury of intrinsic muscle, fascia and tendon of left little finger at wrist and hand levelS66.598Other injury of intrinsic muscle, fascia and tendon of other finger at wrist and hand levelS66.599Other injury of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level

Clinical Description

ICD-10-CM code S66.59 represents other injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 6-character code at the 5th level of specificity. There are 10 more specific child codes under S66.59.

Frequently Asked Questions

What is ICD-10 code S66.59?

ICD-10-CM code S66.59 is "Other injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S66.59 a billable ICD-10 code?

No, S66.59 is a non-billable header code. A more specific child code must be used for billing.

Can S66.59 be coded with other codes?

S66.59 has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S66.5

Other codes in the same category that may be relevant for differential coding:

S66.50Unspecified injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand levelS66.51Strain of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand levelS66.52Laceration of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level

🧪 Validate Combinations

Add S66.59 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeS66.59
BillableNo — Header code
ParentS66.5
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes10 rule(s)
Excludes22 note(s)
Child codes10

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)