S52.046Q

Nondisplaced fracture of coronoid process of unspecified ulna, subsequent encounter for open fracture type I or II with malunion

Billable FY2026 2025-10-01 → 2026-09-30

This is the unspecified option. 15 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.

Exclusions 11 never code together

S52.0code

Excludes2

fracture of elbow NOS (S42.40-)S42.40-
fractures of shaft of ulna (S52.2-)S52.2-

S52code

Excludes1

traumatic amputation of forearm (S58.-)S58.-

Excludes2

fracture at wrist and hand level (S62.-)S62.-
periprosthetic fracture around internal prosthetic elbow joint (M97.4)M97.4

S50-S59block

Excludes2

burns and corrosions (T20-T32)T20-T32
frostbite (T33-T34)T33-T34
injuries of wrist and hand (S60-S69)S60-S69
insect bite or sting, venomous (T63.4)T63.4

S00-T88chapter

Excludes2

birth trauma (P10-P15)P10-P15
obstetric trauma (O70-O71)O70-O71

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

7th character 16

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 this code

R subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

S sequela

Instructional notes 7

S52code

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

S52.0code

Inclusion terms

Fracture of proximal end of ulna

S00-T88chapter

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.

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)Z18.-

Index entries leading here 1

Fracture, traumatic (abduction) (adduction) (separation) T14.8
- ulna (shaft) S52.20
  - upper end S52.00
    - coronoid process (displaced) S52.04
      - nondisplaced S52.04

Alongside this code 15 same parent — S52.046

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: S52.046
Block: S50-S59
Siblings: 15

Present FY2024–FY2027.