S80.842D – External constriction, left lower leg, subsequent encounter

ICD-10-CM 2027 diagnosis code · Injuries to the knee and lower leg

Billable code

ICD-10-CM code S80.842D

Code: S80.842D (claims format: S80842D)
Description: External constriction, left lower leg, subsequent encounter
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: S80-S89 Injuries to the knee and lower leg
Parent codes: S80 › S80.8 › S80.84 › S80.842

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.

S80 – Superficial injury of knee and lower leg

Excludes2 (not included here):

superficial injury of ankle and foot (S90.-)

7th character note:

The appropriate 7th character is to be added to each code from category S80

Block S80-S89

Excludes2 (not included here):

burns and corrosions (T20-T32)
frostbite (T33-T34)
injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)
insect bite or sting, venomous (T63.4)

Related codes in S80.842

Frequently asked questions

What is ICD-10 code S80.842D?

S80.842D is the ICD-10-CM code for external constriction, left lower leg, subsequent encounter, in the block S80-S89 (Injuries to the knee and lower leg).

Is S80.842D a billable code?

Yes. S80.842D is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does S80.842D belong to?

It belongs to category S80 – Superficial injury of knee and lower leg.

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.