Coding and coverage · ICD-10-CM

S52 › S52.0 › S52.02 › S52.021

S52.021R Displaced fracture of olecranon process without intraarticular extension of right ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

BillableNo payment HCCChapter 19

7th character R: subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

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Instructional notes

Chapter 19

Excludes2Not included here: the patient may have both; report both when both are present.
Use additional codeAdd a second code for the full picture.
  • code to identify any retained foreign body, if applicable (Z18.-)
Notes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Section S50-S59

Excludes2Not included here: the patient may have both; report both when both are present.

S52

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • traumatic amputation of forearm (S58.-)
Excludes2Not included here: the patient may have both; report both when both are present.
  • fracture at wrist and hand level (S62.-)
  • periprosthetic fracture around internal prosthetic elbow joint (M97.4)
Notes
  • A fracture not indicated as displaced or nondisplaced should be coded to displaced
  • A fracture not indicated as open or closed should be coded to closed
  • The open fracture designations are based on the Gustilo open fracture classification
7th charactersThe 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

S52.0

Excludes2Not included here: the patient may have both; report both when both are present.
  • fracture of elbow NOS (S42.40-)
  • fractures of shaft of ulna (S52.2-)
Inclusion terms
  • Fracture of proximal end of ulna

Chapter 19: Injury, poisoning and certain other consequences of external causes · S50-S59 Injuries to the elbow and forearm (S50-S59)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.