Skip to main content

S52.045B vs S52.046B

S52.045B (Nondisplaced fracture of coronoid process of left ulna, initial encounter for open fracture type I or II) compared with S52.046B (Nondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or II), from the official CMS tabular data. S52.045B and S52.046B code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S52.045B
Left
Nondisplaced fracture of coronoid process of left ulna, initial encounter for open fracture type I or II
S52.046B
Unspecified
Nondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or II

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. S52.045B and S52.046B name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

S52.045BNondisplaced fracture of coronoid process of left ulna, initial encounter for open fracture type I or IIS52.046BNondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or II
Billing statusBillableBillable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionNondisplaced fracture of coronoid process of left ulna, initial encounter for open fracture type I or II is a billable ICD-10-CM diagnosis code (S52.045B).Nondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or II is a billable ICD-10-CM diagnosis code (S52.046B).
7th characterThe appropriate 7th character is to be added to all codes from category S52The appropriate 7th character is to be added to all codes from category S52

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources