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S99.041A vs S99.041B

S99.041A (Salter-Harris Type IV physeal fracture of right calcaneus, initial encounter for closed fracture) compared with S99.041B (Salter-Harris Type IV physeal fracture of right calcaneus, initial encounter for open fracture), from the official CMS tabular data. S99.041A and S99.041B code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

S99.041A
Initial encounter
Salter-Harris Type IV physeal fracture of right calcaneus, initial encounter for closed fracture
↔
S99.041B
Initial encounter
Salter-Harris Type IV physeal fracture of right calcaneus, initial encounter for open fracture

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. S99.041A and S99.041B 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

S99.041ASalter-Harris Type IV physeal fracture of right calcaneus, initial encounter for closed fractureS99.041BSalter-Harris Type IV physeal fracture of right calcaneus, initial encounter for open fracture
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)
DefinitionSalter-Harris Type IV physeal fracture of right calcaneus, initial encounter for closed fracture is a billable ICD-10-CM diagnosis code (S99.041A).Salter-Harris Type IV physeal fracture of right calcaneus, initial encounter for open fracture is a billable ICD-10-CM diagnosis code (S99.041B).
7th characterThe appropriate 7th character is to be added to each code from subcategories S99.0The appropriate 7th character is to be added to each code from subcategories S99.0
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources