S52.299B — Other fracture of shaft of unspecified ulna, initial encounter for open fracture type I or II
S52.299B is a billable, specific ICD-10-CM code for other fracture of shaft of unspecified ulna, initial encounter for open fracture type i or ii. It is valid for submission on a claim.
7th character "B" — initial encounter for open fracture type I or II
The appropriate 7th character is to be added to all codes from category S52
- A
- initial encounter for closed fracture
- B
- initial encounter for open fracture type I or II
- C
- initial encounter for open fracture type IIIA, IIIB, or IIIC
- D
- subsequent encounter for closed fracture with routine healing
- E
- subsequent encounter for open fracture type I or II with routine healing
- F
- subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
- G
- subsequent encounter for closed fracture with delayed healing
- H
- subsequent encounter for open fracture type I or II with delayed healing
- J
- subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
- K
- subsequent encounter for closed fracture with nonunion
- M
- subsequent encounter for open fracture type I or II with nonunion
- N
- subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
- P
- subsequent encounter for closed fracture with malunion
- Q
- subsequent encounter for open fracture type I or II with malunion
- R
- subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
- S
- sequela
Excludes1 inherited from the categories above S52.299B
These are not written on S52.299B, but they bind it: a note on a category applies to every code beneath it. Billing S52.299B with anything listed here is a denial.
Excludes2 inherited from the categories above S52.299B
Also inherited, and the opposite of Excludes1: these conditions are not part of S52.299B, but a patient can have both, so you may code both.
Other codes that can never be billed with S52.299B
These codes carry an Excludes1 note pointing at S52.299B. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S52.299B alone.
Risk adjustment
S52.299B 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
S52.299B 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 S52.299. If S52.299B is not quite right, the correct code is usually one of these.
- S52.299AOther fracture of shaft of unspecified ulna, initial encounter for closed fracture
- S52.299COther fracture of shaft of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIIC
- S52.299DOther fracture of shaft of unspecified ulna, subsequent encounter for closed fracture with routine healing
- S52.299EOther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type I or II with routine healing
- S52.299FOther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
- S52.299GOther fracture of shaft of unspecified ulna, subsequent encounter for closed fracture with delayed healing
- S52.299HOther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type I or II with delayed healing
- S52.299JOther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
- S52.299KOther fracture of shaft of unspecified ulna, subsequent encounter for closed fracture with nonunion
- S52.299MOther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type I or II with nonunion
- S52.299NOther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
- S52.299POther fracture of shaft of unspecified ulna, subsequent encounter for closed fracture with malunion
- S52.299QOther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type I or II with malunion
- S52.299ROther fracture of shaft of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
- S52.299SOther fracture of shaft of unspecified ulna, sequela
Questions about S52.299B
- Is S52.299B a billable ICD-10-CM code?
- Yes. S52.299B is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S52.299B sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the elbow and forearm (S50-S59).
- What cannot be coded together with S52.299B?
- S52.299B 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 S52.299B (S52) and apply to it just the same.