S21.35

S21.35: Open bite of front wall of thorax with penetration into thoracic cavity

Non-billable headerICD-10-CM

S21.35 is a non-billable header ICD-10-CM code for open bite of front wall of thorax with penetration into thoracic cavity. 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 front wall of thorax (S20.37)

Excludes1 inherited from the categories above S21.35

A category’s note binds every code beneath it.

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 S21.35

3 child codes. Green means billable.