Is ICD-10-CM code W58 billable?

No, W58 (Contact with crocodile or alligator) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code W58 belong to?

W58 belongs to Chapter 20 of the ICD-10-CM tabular list: V00–Y99 (External Causes of Morbidity).

W58Not billable, use a more specific code below

Contact with crocodile or alligator

In Exposure to animate mechanical forces (W50-W64), chapter 20: External Causes of Morbidity

24 billable codes under W58: none are a CC or MCC; none map to an HCC.

Instructional notes

Also applies, from Exposure to animate mechanical forces (W50-W64)

These notes sit on W50-W64 and apply to every code under it, including W58.

Excludes1: not coded here, use a different code

Toxic effect of contact with venomous animals and plants (T63.-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers how to report external cause codes (V00-Y99) describing cause, intent, place, activity, and status. They are never principal or first-listed, and reporting is voluntary unless required.

General External Cause Coding Guidelines (page 88)
Place of Occurrence Guideline (page 89)
Activity Code (page 89)
Place of Occurrence, Activity, and Status Codes Used with other External Cause Code (page 89)
If the Reporting Format Limits the Number of External Cause Codes (page 90)
Multiple External Cause Coding Guidelines (page 90)
Child and Adult Abuse Guideline (page 90)
Unknown or Undetermined Intent Guideline (page 91)

Read Section I.C.20 (page 87), 3 more topics

All codes under W58

W58 can't be used on a claim. Pick a billable code below; grey headings group them.

W58 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.