W54.0 – Bitten by dog

ICD-10-CM 2027 diagnosis code · Exposure to animate mechanical forces

Non-billable header

ICD-10-CM code W54.0

Code: W54.0 (claims format: W540)
Description: Bitten by dog
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 20. External causes of morbidity (V00-Y99)
Block: W50-W64 Exposure to animate mechanical forces
Parent codes: W54

Billable codes under W54.0

W54.0 is a header code and cannot be used on claims. Choose the most specific code:

W54.0XXA – Bitten by dog, initial encounterBillable
W54.0XXD – Bitten by dog, subsequent encounterBillable
W54.0XXS – Bitten by dog, sequelaBillable

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

W54 – Contact with dog

Includes:

contact with saliva, feces or urine of dog

7th character note:

The appropriate 7th character is to be added to each code from category W54

Block W50-W64

Excludes1 (not coded here):

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

Related codes in W54

W54.1 – Struck by dogHeader
W54.8 – Other contact with dogHeader

Frequently asked questions

What is ICD-10 code W54.0?

W54.0 is the ICD-10-CM code for bitten by dog, in the block W50-W64 (Exposure to animate mechanical forces).

Is W54.0 a billable code?

No. W54.0 is a header code with more specific child codes; report one of the billable codes listed above.

What category does W54.0 belong to?

It belongs to category W54 – Contact with dog.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.