Question 1

Is S91 a billable ICD-10 code?

Accepted Answer

No, S91 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 S91 mean?

Accepted Answer

ICD-10-CM code S91 represents Open wound of ankle, foot and toes. 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 S91 introduced?

Accepted Answer

Code S91 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 S91?

Accepted Answer

The parent category for S91 is section:S90-S99 (Injuries to the ankle and foot (S90-S99)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions are excluded from S91?

Accepted Answer

Code S91 has Type 1 Excludes (mutually exclusive conditions) including: open fracture of ankle, foot and toes (S92.-with 7th character B); traumatic amputation of ankle and foot (S98.-). These conditions cannot be coded together with S91 as they represent different diagnoses.

Question 6

Does S91 require a 7th character extension?

Accepted Answer

Yes, S91 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., S91XXA for initial encounter). The extension indicates whether this is an initial visit, follow-up, or treatment for a late effect.

S912026

Excludes12Not coded together

Excludes26Not included here

Code Also1Consider additional code

Use Additional Code1Add code for detail

Notes2Additional information

7th Character Extensions3Encounter type specifiers