S21.0 — Open wound of breast
Not billable
Is S21.0 billable?
No — S21.0 is a non-billable header code. S21.0 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 54 billable codes beneath S21.0.
Billable codes under this header
- S21.001AUnspecified open wound of right breast, initial encounter
- S21.001DUnspecified open wound of right breast, subsequent encounter
- S21.001SUnspecified open wound of right breast, sequela
- S21.002AUnspecified open wound of left breast, initial encounter
- S21.002DUnspecified open wound of left breast, subsequent encounter
- S21.002SUnspecified open wound of left breast, sequela
- S21.009AUnspecified open wound of unspecified breast, initial encounter
- S21.009DUnspecified open wound of unspecified breast, subsequent encounter
- S21.009SUnspecified open wound of unspecified breast, sequela
- S21.011ALaceration without foreign body of right breast, initial encounter
- S21.011DLaceration without foreign body of right breast, subsequent encounter
- S21.011SLaceration without foreign body of right breast, sequela
- S21.012ALaceration without foreign body of left breast, initial encounter
- S21.012DLaceration without foreign body of left breast, subsequent encounter
- S21.012SLaceration without foreign body of left breast, sequela
- S21.019ALaceration without foreign body of unspecified breast, initial encounter
- S21.019DLaceration without foreign body of unspecified breast, subsequent encounter
- S21.019SLaceration without foreign body of unspecified breast, sequela
- S21.021ALaceration with foreign body of right breast, initial encounter
- S21.021DLaceration with foreign body of right breast, subsequent encounter
- S21.021SLaceration with foreign body of right breast, sequela
- S21.022ALaceration with foreign body of left breast, initial encounter
- S21.022DLaceration with foreign body of left breast, subsequent encounter
- S21.022SLaceration with foreign body of left breast, sequela
- S21.029ALaceration with foreign body of unspecified breast, initial encounter
- S21.029DLaceration with foreign body of unspecified breast, subsequent encounter
- S21.029SLaceration with foreign body of unspecified breast, sequela
- S21.031APuncture wound without foreign body of right breast, initial encounter
- S21.031DPuncture wound without foreign body of right breast, subsequent encounter
- S21.031SPuncture wound without foreign body of right breast, sequela
- S21.032APuncture wound without foreign body of left breast, initial encounter
- S21.032DPuncture wound without foreign body of left breast, subsequent encounter
- S21.032SPuncture wound without foreign body of left breast, sequela
- S21.039APuncture wound without foreign body of unspecified breast, initial encounter
- S21.039DPuncture wound without foreign body of unspecified breast, subsequent encounter
- S21.039SPuncture wound without foreign body of unspecified breast, sequela
- S21.041APuncture wound with foreign body of right breast, initial encounter
- S21.041DPuncture wound with foreign body of right breast, subsequent encounter
- S21.041SPuncture wound with foreign body of right breast, sequela
- S21.042APuncture wound with foreign body of left breast, initial encounter
- S21.042DPuncture wound with foreign body of left breast, subsequent encounter
- S21.042SPuncture wound with foreign body of left breast, sequela
- S21.049APuncture wound with foreign body of unspecified breast, initial encounter
- S21.049DPuncture wound with foreign body of unspecified breast, subsequent encounter
- S21.049SPuncture wound with foreign body of unspecified breast, sequela
- S21.051AOpen bite of right breast, initial encounter
- S21.051DOpen bite of right breast, subsequent encounter
- S21.051SOpen bite of right breast, sequela
- S21.052AOpen bite of left breast, initial encounter
- S21.052DOpen bite of left breast, subsequent encounter
- S21.052SOpen bite of left breast, sequela
- S21.059AOpen bite of unspecified breast, initial encounter
- S21.059DOpen bite of unspecified breast, subsequent encounter
- S21.059SOpen bite of unspecified breast, sequela
S21.0 at a glance
| Code | S21.0 |
|---|---|
| Description | Open wound of breast |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from S21
The conditions below can never be reported together with S21.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- traumatic amputation (partial) of thorax (S28.1)
Use additional code — inherited from Chapter 19
Report an additional code alongside S21.0 to fully describe the condition. S21.0 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of S21.0, but a patient may have both at the same time. When documentation supports it, S21.0 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S20-S29
The conditions below are not part of S21.0, but a patient may have both at the same time. When documentation supports it, S21.0 and the excluded code may both be reported.
- 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)
Code also — inherited from S21
Two codes may be needed to describe the condition fully. Whether S21.0 is sequenced first depends on the reason for the encounter.
What codes fall under S21.0? (6)
- S21.00Unspecified open wound of breastnot billable
- S21.01Laceration without foreign body of breastnot billable
- S21.02Laceration with foreign body of breastnot billable
- S21.03Puncture wound without foreign body of breastnot billable
- S21.04Puncture wound with foreign body of breastnot billable
- S21.05Open bite of breastnot billable
How long has S21.0 existed?
S21.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
What other codes are in the S21 family? (5)
- S21.1Open wound of front wall of thorax without penetration into thoracic cavitynot billable
- S21.2Open wound of back wall of thorax without penetration into thoracic cavitynot billable
- S21.3Open wound of front wall of thorax with penetration into thoracic cavitynot billable
- S21.4Open wound of back wall of thorax with penetration into thoracic cavitynot billable
- S21.9Open wound of unspecified part of thoraxnot billable