S20.4 — Other and unspecified superficial injuries of back wall of thorax
Not billable
Is S20.4 billable?
No — S20.4 is a non-billable header code. S20.4 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 60 billable codes beneath S20.4.
Billable codes under this header
- S20.401AUnspecified superficial injuries of right back wall of thorax, initial encounter
- S20.401DUnspecified superficial injuries of right back wall of thorax, subsequent encounter
- S20.401SUnspecified superficial injuries of right back wall of thorax, sequela
- S20.402AUnspecified superficial injuries of left back wall of thorax, initial encounter
- S20.402DUnspecified superficial injuries of left back wall of thorax, subsequent encounter
- S20.402SUnspecified superficial injuries of left back wall of thorax, sequela
- S20.409AUnspecified superficial injuries of unspecified back wall of thorax, initial encounter
- S20.409DUnspecified superficial injuries of unspecified back wall of thorax, subsequent encounter
- S20.409SUnspecified superficial injuries of unspecified back wall of thorax, sequela
- S20.411AAbrasion of right back wall of thorax, initial encounter
- S20.411DAbrasion of right back wall of thorax, subsequent encounter
- S20.411SAbrasion of right back wall of thorax, sequela
- S20.412AAbrasion of left back wall of thorax, initial encounter
- S20.412DAbrasion of left back wall of thorax, subsequent encounter
- S20.412SAbrasion of left back wall of thorax, sequela
- S20.419AAbrasion of unspecified back wall of thorax, initial encounter
- S20.419DAbrasion of unspecified back wall of thorax, subsequent encounter
- S20.419SAbrasion of unspecified back wall of thorax, sequela
- S20.421ABlister (nonthermal) of right back wall of thorax, initial encounter
- S20.421DBlister (nonthermal) of right back wall of thorax, subsequent encounter
- S20.421SBlister (nonthermal) of right back wall of thorax, sequela
- S20.422ABlister (nonthermal) of left back wall of thorax, initial encounter
- S20.422DBlister (nonthermal) of left back wall of thorax, subsequent encounter
- S20.422SBlister (nonthermal) of left back wall of thorax, sequela
- S20.429ABlister (nonthermal) of unspecified back wall of thorax, initial encounter
- S20.429DBlister (nonthermal) of unspecified back wall of thorax, subsequent encounter
- S20.429SBlister (nonthermal) of unspecified back wall of thorax, sequela
- S20.441AExternal constriction of right back wall of thorax, initial encounter
- S20.441DExternal constriction of right back wall of thorax, subsequent encounter
- S20.441SExternal constriction of right back wall of thorax, sequela
- S20.442AExternal constriction of left back wall of thorax, initial encounter
- S20.442DExternal constriction of left back wall of thorax, subsequent encounter
- S20.442SExternal constriction of left back wall of thorax, sequela
- S20.449AExternal constriction of unspecified back wall of thorax, initial encounter
- S20.449DExternal constriction of unspecified back wall of thorax, subsequent encounter
- S20.449SExternal constriction of unspecified back wall of thorax, sequela
- S20.451ASuperficial foreign body of right back wall of thorax, initial encounter
- S20.451DSuperficial foreign body of right back wall of thorax, subsequent encounter
- S20.451SSuperficial foreign body of right back wall of thorax, sequela
- S20.452ASuperficial foreign body of left back wall of thorax, initial encounter
- S20.452DSuperficial foreign body of left back wall of thorax, subsequent encounter
- S20.452SSuperficial foreign body of left back wall of thorax, sequela
- S20.459ASuperficial foreign body of unspecified back wall of thorax, initial encounter
- S20.459DSuperficial foreign body of unspecified back wall of thorax, subsequent encounter
- S20.459SSuperficial foreign body of unspecified back wall of thorax, sequela
- S20.461AInsect bite (nonvenomous) of right back wall of thorax, initial encounter
- S20.461DInsect bite (nonvenomous) of right back wall of thorax, subsequent encounter
- S20.461SInsect bite (nonvenomous) of right back wall of thorax, sequela
- S20.462AInsect bite (nonvenomous) of left back wall of thorax, initial encounter
- S20.462DInsect bite (nonvenomous) of left back wall of thorax, subsequent encounter
- S20.462SInsect bite (nonvenomous) of left back wall of thorax, sequela
- S20.469AInsect bite (nonvenomous) of unspecified back wall of thorax, initial encounter
- S20.469DInsect bite (nonvenomous) of unspecified back wall of thorax, subsequent encounter
- S20.469SInsect bite (nonvenomous) of unspecified back wall of thorax, sequela
- S20.471AOther superficial bite of right back wall of thorax, initial encounter
- S20.471DOther superficial bite of right back wall of thorax, subsequent encounter
- S20.471SOther superficial bite of right back wall of thorax, sequela
- S20.472AOther superficial bite of left back wall of thorax, initial encounter
- S20.472DOther superficial bite of left back wall of thorax, subsequent encounter
- S20.472SOther superficial bite of left back wall of thorax, sequela
S20.4 at a glance
| Code | S20.4 |
|---|---|
| Description | Other and unspecified superficial injuries of back wall of thorax |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Use additional code — inherited from Chapter 19
Report an additional code alongside S20.4 to fully describe the condition. S20.4 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 S20.4, but a patient may have both at the same time. When documentation supports it, S20.4 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S20-S29
The conditions below are not part of S20.4, but a patient may have both at the same time. When documentation supports it, S20.4 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)
What codes fall under S20.4? (7)
- S20.40Unspecified superficial injuries of back wall of thoraxnot billable
- S20.41Abrasion of back wall of thoraxnot billable
- S20.42Blister (nonthermal) of back wall of thoraxnot billable
- S20.44External constriction of back wall of thoraxnot billable
- S20.45Superficial foreign body of back wall of thoraxnot billable
- S20.46Insect bite (nonvenomous) of back wall of thoraxnot billable
- S20.47Other superficial bite of back wall of thoraxnot billable
How long has S20.4 existed?
S20.4 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.