Is S99.091K a billable ICD-10-CM code?

Yes. S99.091K is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does S99.091K sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the ankle and foot (S90-S99).

S99.091K

S99.091K — Other physeal fracture of right calcaneus, subsequent encounter for fracture with nonunion

Billable / specific codeICD-10-CMPOA exemptright

S99.091K is a billable, specific ICD-10-CM code for other physeal fracture of right calcaneus, subsequent encounter for fracture with nonunion. It is valid for submission on a claim.

7th character "K" — subsequent encounter for fracture with nonunion

The appropriate 7th character is to be added to each code from subcategories S99.0

A: initial encounter for closed fracture
B: initial encounter for open fracture
D: subsequent encounter for fracture with routine healing
G: subsequent encounter for fracture with delayed healing
K: subsequent encounter for fracture with nonunion
P: subsequent encounter for fracture with malunion
S: sequela

Risk adjustment

S99.091K 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.

Related codes at this level

Codes that share S99.091. If S99.091K is not quite right, the correct code is usually one of these.

Questions about S99.091K

Is S99.091K a billable ICD-10-CM code?: Yes. S99.091K is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S99.091K sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the ankle and foot (S90-S99).