S20.342D – External constriction of left front wall of thorax, subsequent encounter
ICD-10-CM 2027 diagnosis code · Injuries to the thorax
ICD-10-CM code
S20.342D
- Code
S20.342D(claims format:S20342D)- Description
- External constriction of left front wall of thorax, subsequent encounter
- Short description
- External constriction of left front wall of thorax, subs
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
- Block
- S20-S29 Injuries to the thorax
- Parent codes
- S20 › S20.3 › S20.34 › S20.342
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care.
| Character | Meaning |
|---|---|
A | initial encounter |
D | subsequent encounter |
S | sequela |
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
S20 – Superficial injury of thorax
7th character note:
- The appropriate 7th character is to be added to each code from category S20
Block S20-S29
Includes:
- injuries of breast
- injuries of chest (wall)
- injuries of interscapular area
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)
Related codes in S20.342
Frequently asked questions
What is ICD-10 code S20.342D?
S20.342D is the ICD-10-CM code for external constriction of left front wall of thorax, subsequent encounter, in the block S20-S29 (Injuries to the thorax).
Is S20.342D a billable code?
Yes. S20.342D is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does S20.342D belong to?
It belongs to category S20 – Superficial injury of thorax.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.