2027 ICD-10-CM Diagnosis Code W58Contact with crocodile or alligator

ICD-10-CM Codes›V01–Y99›W50-W64›W58

ICD-10-CM W58
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

W58 is a non-billable ICD-10-CM category code for contact with crocodile or alligator, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W58.01XA, W58.01XD, W58.01XS, and W58.02XA.

Code Identity

ICD-10-CM Code
W58
Billable Status
No — Non-Billable Category
Code Describes
Contact with crocodile or alligator
Short Description
Contact with crocodile or alligator
Same as the full description in the CMS dataset.
Chapter
W50-W64
Exposure to animate mechanical forces

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionW50-W64Exposure to animate mechanical forces
CategoryW58Contact with crocodile or alligator
This CodeW58Contact with crocodile or alligator

Specific Coding for Contact with crocodile or alligatorOverview

Non-specific codes like W58 require more characters. Use one of these billable codes instead:

  • W58.0 for Contact with alligator

  • W58.01 for Bitten by alligator

  • W58.02 for Struck by alligator

  • W58.03 for Crushed by alligator

  • W58.09 for Other contact with alligator

  • W58.1 for Contact with crocodile

  • W58.11 for Bitten by crocodile

  • W58.12 for Struck by crocodile

  • W58.13 for Crushed by crocodile

  • W58.19 for Other contact with crocodile

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to W58: its own notes plus those printed at block W50-W64 and Chapter 20. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block W50-W64 Exposure to animate mechanical forces applies to 336 codes
  • Toxic effect of contact with venomous animals and plants (T63.-)

Notes

General instructions on how these codes are used.

From Chapter 20 (V00-Y99) External causes of morbidity and mortality applies to 7,461 codes
  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

  • The appropriate 7th character is to be added to each code from category W58
Values for category W58 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About W58Overview

What is the ICD-10 code for contact with crocodile or alligator?

W58 is the ICD-10-CM category for contact with crocodile or alligator, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is W58 (Contact with crocodile or alligator) a billable code?

No. This is a category header that groups the codes for contact with crocodile or alligator, and headers cannot be submitted on claims. Claims for contact with crocodile or alligator need a more specific code from this category, such as W58.01XA, W58.01XD, and W58.01XS.

Can W58 be reported with a code from T63?

Not as a rule. The Excludes1 note at block W50-W64, which applies to W58, lists "Toxic effect of contact with venomous animals and plants (T63.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).