S21.05
S21.05: Open bite of breast
Non-billable headerICD-10-CM
S21.05 is a non-billable header ICD-10-CM code for open bite of breast. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category S21
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- superficial bite of breast (S20.17)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Bite of breast NOS
Other codes that can never be billed with S21.05
Their own Excludes1 notes name this code, so the conflict is not listed above.
- S20.17Other superficial bite of breast
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead S21.05
3 child codes. Green means billable.