S59.00
Unspecified physeal fracture of lower end of ulna
S59.00 is a non-billable ICD-10-CM code header for unspecified physeal fracture of lower end of ulna. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are S59.001 Unspecified physeal fracture of lower end of ulna, right arm; S59.002 Unspecified physeal fracture of lower end of ulna, left arm and S59.009 Unspecified physeal fracture of lower end of ulna, unspecified arm. Its coding notes include a Use additional code instruction and 7 Excludes2 entries.
7th characters
Every code below needs one of these (defined at S59).
The appropriate 7th character is to be added to each code from subcategories S59.0, S59.1, and S59.2
- Ainitial encounter for closed fracture
- Dsubsequent encounter for fracture with routine healing
- Gsubsequent encounter for fracture with delayed healing
- Ksubsequent encounter for fracture with nonunion
- Psubsequent encounter for fracture with malunion
- Ssequela
Guidelines tips
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
A fracture not stated as open or closed is coded closed, and one not stated as displaced or not displaced is coded displaced. Nonunion and malunion have their own 7th characters.
The 7th character depends on whether the patient is in active treatment, not on who sees the patient. An aftercare Z code is not used for injury aftercare.
Each injury gets its own code unless a combination code exists, with the most serious injury first. Superficial injuries at the same site as a more severe injury are not coded. Injuries during medical care are coded as complications.
Only the code for the type of physeal fracture is assigned, with no separate code for the specific bone.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (1 note)
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
- other and unspecified injuries of wrist and hand (S69.-)
Also from chapter/block level (6 notes)
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Notes
Also from chapter/block level (2 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.
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 1 entry