Contact with crocodile or alligator (W58) ICD-10-CM
The W58 code range covers contact with crocodile or alligator with 35 ICD-10-CM diagnosis codes. 24 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
- The appropriate 7th character is to be added to each code from category W58
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
- A - initial encounter
- D - subsequent encounter
- S - sequela
Codes in the W58 Range 35 codes · 24 billable
- W58 Contact with crocodile or alligatorNon-billable
- W58.0 Contact with alligatorNon-billable
- W58.01 Bitten by alligatorNon-billable
- W58.01XA Bitten by alligator, initial encounter
- W58.01XD Bitten by alligator, subsequent encounter
- W58.01XS Bitten by alligator, sequela
- W58.02 Struck by alligatorNon-billable
- W58.02XA Struck by alligator, initial encounter
- W58.02XD Struck by alligator, subsequent encounter
- W58.02XS Struck by alligator, sequela
- W58.03 Crushed by alligatorNon-billable
- W58.03XA Crushed by alligator, initial encounter
- W58.03XD Crushed by alligator, subsequent encounter
- W58.03XS Crushed by alligator, sequela
- W58.09 Other contact with alligatorNon-billable
- W58.09XA Other contact with alligator, initial encounter
- W58.09XD Other contact with alligator, subsequent encounter
- W58.09XS Other contact with alligator, sequela
- W58.1 Contact with crocodileNon-billable
- W58.11 Bitten by crocodileNon-billable
- W58.11XA Bitten by crocodile, initial encounter
- W58.11XD Bitten by crocodile, subsequent encounter
- W58.11XS Bitten by crocodile, sequela
- W58.12 Struck by crocodileNon-billable
- W58.12XA Struck by crocodile, initial encounter
- W58.12XD Struck by crocodile, subsequent encounter
- W58.12XS Struck by crocodile, sequela
- W58.13 Crushed by crocodileNon-billable
- W58.13XA Crushed by crocodile, initial encounter
- W58.13XD Crushed by crocodile, subsequent encounter
- W58.13XS Crushed by crocodile, sequela
- W58.19 Other contact with crocodileNon-billable
- W58.19XA Other contact with crocodile, initial encounter
- W58.19XD Other contact with crocodile, subsequent encounter
- W58.19XS Other contact with crocodile, sequela
About the W58 Code Range
The ICD-10 code W58 series is used to classify injuries and accidents involving contact with crocodiles or alligators. These codes precisely identify the nature of the encounter, such as being bitten, struck, or crushed by these reptiles.
The codes under W58 cover various scenarios, including initial, subsequent, and sequela (long-term) encounters with crocodiles or alligators. For example, W58.01XA denotes an initial encounter with a bite from an alligator, also known as a "Bite of alligator" or "Bite of reptile." Similarly, W58.11XA refers to an initial bite by a crocodile, helping coders assign the correct code for medical records related to reptile-related injuries. Other codes in this section specify injuries like being struck or crushed by these animals. This classification plays an essential role in capturing the precise cause of injury related to crocodile or alligator contact for clinical documentation and reporting purposes.
Questions About This Page
How many billable codes are in the W58 range?
Of the 35 codes in this range, 24 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the W58 range classify?
The range classifies contact with crocodile or alligator. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
