Question 1

Is W55 a billable ICD-10 code?

Accepted Answer

No, W55 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 W55 mean?

Accepted Answer

ICD-10-CM code W55 represents Contact with other mammals. 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 W55 introduced?

Accepted Answer

Code W55 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 W55?

Accepted Answer

The parent category for W55 is section:W50-W64 (Exposure to animate mechanical forces (W50-W64)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions are excluded from W55?

Accepted Answer

Code W55 has Type 1 Excludes (mutually exclusive conditions) including: animal being ridden- see transport accidents; bitten or struck by dog (W54); bitten or struck by rodent (W53.-) and 1 more conditions. These conditions cannot be coded together with W55 as they represent different diagnoses.

Question 6

Does W55 require a 7th character extension?

Accepted Answer

Yes, W55 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., W55XXA for initial encounter). The extension indicates whether this is an initial visit, follow-up, or treatment for a late effect.

W552026

Excludes15Not coded together

Notes1Additional information

Includes1Included conditions

7th Character Extensions3Encounter type specifiers