ICD-10-CM › S00-T88 › S20-S29 › S21.0 Open wound of breast › S21.00
Unspecified open wound of breast
Not billableICD-10-CM diagnosis code.
This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.
Submit one of these 3 more specific codes instead:
- S21.001 Unspecified open wound of right breast (also a header)
- S21.002 Unspecified open wound of left breast (also a header)
- S21.009 Unspecified open wound of unspecified breast (also a header)
This code requires a seventh character. See the rule below.
What has happened to this code
Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2012 Added to the draft code set draft Unspecified open wound of breast
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from S21 Open wound of thorax
Seventh character required
- The appropriate 7th character is to be added to each code from category S21
Excludes1 - never coded here
- traumatic amputation (partial) of thorax (S28.1)
Code also
- any associated injury, such as:
- injury of heart (S26.-)
- injury of intrathoracic organs (S27.-)
- rib fracture (S22.3-, S22.4-)
- spinal cord injury (S24.0-, S24.1-)
- traumatic hemopneumothorax (S27.3)
- traumatic hemothorax (S27.1)
- traumatic pneumothorax (S27.0)
- wound infection
Inherited from the S20-S29 section Injuries to the thorax (S20-S29)
Excludes2 - not included here
- burns and corrosions (T20-T32)
- effects of foreign body in bronchus (T17.5)
- effects of foreign body in esophagus (T18.1)
- effects of foreign body in lung (T17.8)
- effects of foreign body in trachea (T17.4)
- frostbite (T33-T34)
- injuries of axilla
- injuries of clavicle
- injuries of scapular region
- injuries of shoulder
- insect bite or sting, venomous (T63.4)
Includes
- injuries of breast
- injuries of chest (wall)
- injuries of interscapular area
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Wound, open > mammary
- Wound, open > chest wall
- Wound, open > costal region
- Wound, open > sternal region
- Wound, open > thorax, thoracic > breast
- Injury > thorax, thoracic > external > open
- Wound, open > breast
Codes in the same group
| Code | Description | Status |
|---|---|---|
| S21.01 | Laceration without foreign body of breast | Not billable |
| S21.02 | Laceration with foreign body of breast | Not billable |
| S21.03 | Puncture wound without foreign body of breast | Not billable |
| S21.04 | Puncture wound with foreign body of breast | Not billable |
| S21.05 | Open bite of breast | Not billable |