Question 1

Is S66 a billable ICD-10 code?

Accepted Answer

No, S66 is not a billable code. It is a category code that requires additional specificity. You must select a more specific code from the subcategories for billing purposes.

Question 2

What does ICD-10 code S66 mean?

Accepted Answer

ICD-10-CM code S66 represents Injury of muscle, fascia and tendon at wrist and hand level. This code is part of the International Classification of Diseases, 10th Revision, Clinical Modification used for medical coding and billing in the United States.

Question 3

When was ICD-10 code S66 introduced?

Accepted Answer

Code S66 has been part of ICD-10-CM since 2016, when the coding system was mandated for use in the United States. This code was included in the original US implementation.

Question 4

What is the parent category for ICD-10 code S66?

Accepted Answer

The parent category for S66 is section:S60-S69 (Injuries to the wrist, hand and fingers (S60-S69)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions should be coded separately from S66?

Accepted Answer

Code S66 has Type 2 Excludes including: sprain of joints and ligaments of wrist and hand (S63.-). These conditions are not included in S66 but can be coded together if the patient has both conditions.

Question 6

Does S66 require a 7th character extension?

Accepted Answer

Yes, S66 requires a 7th character to specify the encounter type. Available extensions include: A (initial encounter), D (subsequent encounter), S (sequela). Use "X" as a placeholder to fill empty positions before the 7th character (e.g., S66XXA for initial encounter). The extension indicates whether this is an initial visit, follow-up, or treatment for a late effect.

S662026

Excludes26Not included here

Code Also1Consider additional code

Use Additional Code1Add code for detail

Notes2Additional information

7th Character Extensions3Encounter type specifiers