MCMedicalCodingSoftware
S21.052

S21.052: Open bite of left breast

Non-billable headerICD-10-CMleft

S21.052 is a non-billable header ICD-10-CM code for open bite of left 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 inherited from the categories above S21.052

A category’s note binds every code beneath it.

Written on S21.05: Open bite of breast

  • superficial bite of breast (S20.17)

Written on S21: Open wound of thorax

  • traumatic amputation (partial) of thorax (S28.1)

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 S21.052

3 child codes. Green means billable.

Other codes under S21.05

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.