| S20441D | External constriction of right back wall of thorax, subsequent encounter |
| S20441S | External constriction of right back wall of thorax, sequela |
| S20442 | External constriction of left back wall of thorax |
| S20442A | External constriction of left back wall of thorax, initial encounter |
| S20442D | External constriction of left back wall of thorax, subsequent encounter |
| S20442S | External constriction of left back wall of thorax, sequela |
| S20449 | External constriction of unspecified back wall of thorax |
| S20449A | External constriction of unspecified back wall of thorax, initial encounter |
| S20449D | External constriction of unspecified back wall of thorax, subsequent encounter |
| S20449S | External constriction of unspecified back wall of thorax, sequela |
| S2045 | Superficial foreign body of back wall of thorax |
| S20451 | Superficial foreign body of right back wall of thorax |
| S20451A | Superficial foreign body of right back wall of thorax, initial encounter |
| S20451D | Superficial foreign body of right back wall of thorax, subsequent encounter |
| S20451S | Superficial foreign body of right back wall of thorax, sequela |
| S20452 | Superficial foreign body of left back wall of thorax |
| S20452A | Superficial foreign body of left back wall of thorax, initial encounter |
| S20452D | Superficial foreign body of left back wall of thorax, subsequent encounter |
| S20452S | Superficial foreign body of left back wall of thorax, sequela |
| S20459 | Superficial foreign body of unspecified back wall of thorax |
| S20459A | Superficial foreign body of unspecified back wall of thorax, initial encounter |
| S20459D | Superficial foreign body of unspecified back wall of thorax, subsequent encounter |
| S20459S | Superficial foreign body of unspecified back wall of thorax, sequela |
| S2046 | Insect bite (nonvenomous) of back wall of thorax |
| S20461 | Insect bite (nonvenomous) of right back wall of thorax |
| S20461A | Insect bite (nonvenomous) of right back wall of thorax, init Insect bite (nonvenomous) of right back wall of thorax, initial encounter |
| S20461D | Insect bite (nonvenomous) of right back wall of thorax, subs Insect bite (nonvenomous) of right back wall of thorax, subsequent encounter |
| S20461S | Insect bite (nonvenomous) of right back wall of thorax, sequela |
| S20462 | Insect bite (nonvenomous) of left back wall of thorax |
| S20462A | Insect bite (nonvenomous) of left back wall of thorax, initial encounter |
| S20462D | Insect bite (nonvenomous) of left back wall of thorax, subsequent encounter |
| S20462S | Insect bite (nonvenomous) of left back wall of thorax, sequela |
| S20469 | Insect bite (nonvenomous) of unspecified back wall of thorax Insect bite (nonvenomous) of unspecified back wall of thorax |
| S20469A | Insect bite (nonvenomous) of unspecified back wall of thorax, initial encounter |
| S20469D | Insect bite (nonvenomous) of unspecified back wall of thorax, subsequent encounter |
| S20469S | Insect bite (nonvenomous) of unspecified back wall of thorax, sequela |
| S2047 | Other superficial bite of back wall of thorax |
| S20471 | Other superficial bite of right back wall of thorax |
| S20471A | Other superficial bite of right back wall of thorax, initial encounter |
| S20471D | Other superficial bite of right back wall of thorax, subsequent encounter |
| S20471S | Other superficial bite of right back wall of thorax, sequela Other superficial bite of right back wall of thorax, sequela |
| S20472 | Other superficial bite of left back wall of thorax |
| S20472A | Other superficial bite of left back wall of thorax, initial encounter |
| S20472D | Other superficial bite of left back wall of thorax, subsequent encounter |
| S20472S | Other superficial bite of left back wall of thorax, sequela |
| S20479 | Other superficial bite of unspecified back wall of thorax |
| S20479A | Other superficial bite of unspecified back wall of thorax, initial encounter |
| S20479D | Other superficial bite of unspecified back wall of thorax, subsequent encounter |
| S20479S | Other superficial bite of unspecified back wall of thorax, sequela |
| S209 | Superficial injury of unspecified parts of thorax |