Question 1

Is X99 a billable ICD-10 code?

Accepted Answer

No, X99 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 X99 mean?

Accepted Answer

ICD-10-CM code X99 represents Assault by sharp object. 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 X99 introduced?

Accepted Answer

Code X99 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 X99?

Accepted Answer

The parent category for X99 is section:X92-Y09 (Assault (X92-Y09)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions are excluded from X99?

Accepted Answer

Code X99 has Type 1 Excludes (mutually exclusive conditions) including: assault by strike by sports equipment (Y08.0-). These conditions cannot be coded together with X99 as they represent different diagnoses.

Question 6

Does X99 require a 7th character extension?

Accepted Answer

Yes, X99 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., X99XXA for initial encounter). The extension indicates whether this is an initial visit, follow-up, or treatment for a late effect.

X992026

Excludes14Not coded together

Notes1Additional information

Includes2Included conditions

7th Character Extensions3Encounter type specifiers