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S52.511A vs S52.511B

S52.511A (Displaced fracture of right radial styloid process, initial encounter for closed fracture) compared with S52.511B (Displaced fracture of right radial styloid process, initial encounter for open fracture type I or II), from the official CMS tabular data. S52.511A and S52.511B code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

S52.511A
Initial encounter
Displaced fracture of right radial styloid process, initial encounter for closed fracture
S52.511B
Initial encounter
Displaced fracture of right radial styloid process, initial encounter for open fracture type I or II

Same underlying diagnosis, different encounter phase.

The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.

Source: ICD-10-CM Official Guidelines, Section I.C.19.a

Can these codes be reported together?

Same injury, other encounter phase. S52.511A and S52.511B code the same injury at a different phase of treatment, set by the 7th character.

The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.

Side by side

S52.511ADisplaced fracture of right radial styloid process, initial encounter for closed fractureS52.511BDisplaced fracture of right radial styloid process, 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)
DefinitionDisplaced fracture of right radial styloid process, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S52.511A).Displaced fracture of right radial styloid process, initial encounter for open fracture type I or II is a billable ICD-10-CM diagnosis code (S52.511B).
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