Is S80.279A a billable ICD-10-CM code?

Yes. S80.279A is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does S80.279A sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the knee and lower leg (S80-S89).

What cannot be coded together with S80.279A?

S80.279A carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S80.279A (S80.27) and apply to it just the same.

S80.279A

S80.279A — Other superficial bite of unspecified knee, initial encounter

Billable / specific codeICD-10-CMunspecified

S80.279A is a billable, specific ICD-10-CM code for other superficial bite of unspecified knee, initial encounter. It is valid for submission on a claim.

7th character "A" — initial encounter

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

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above S80.279A

These are not written on S80.279A, but they bind it: a note on a category applies to every code beneath it. Billing S80.279A with anything listed here is a denial.

Written on S80.27 — Other superficial bite of knee

open bite of knee (S81.05-)

Excludes2 inherited from the categories above S80.279A

Also inherited, and the opposite of Excludes1: these conditions are not part of S80.279A, but a patient can have both, so you may code both.

Written on S80 — Superficial injury of knee and lower leg

superficial injury of ankle and foot (S90.-)

Risk adjustment

S80.279A does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

S80.279A has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share S80.279. If S80.279A is not quite right, the correct code is usually one of these.

Questions about S80.279A

Is S80.279A a billable ICD-10-CM code?: Yes. S80.279A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S80.279A sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the knee and lower leg (S80-S89).
What cannot be coded together with S80.279A?: S80.279A carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S80.279A (S80.27) and apply to it just the same.