ICD-9-CM diagnosis code (retired)
813.12 — Open fracture of coronoid process of ulna
About ICD-9-CM 813.12
813.12 is an ICD-9-CM diagnosis code for open fracture of coronoid process of ulna. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to 4 ICD-10-CM codes, such as S52.043B (Displaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or II), S52.043C (Displaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIIC) and S52.046B (Nondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or II). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- S52.043BDisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or IIapproximate
- S52.043CDisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIICapproximate
- S52.046BNondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or IIapproximate
- S52.046CNondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIICapproximate
Common questions about 813.12
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.