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S99.021B vs S99.029B

S99.021B (Salter-Harris Type II physeal fracture of right calcaneus, initial encounter for open fracture) compared with S99.029B (Salter-Harris Type II physeal fracture of unspecified calcaneus, initial encounter for open fracture), from the official CMS tabular data. S99.021B and S99.029B code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S99.021B
Right
Salter-Harris Type II physeal fracture of right calcaneus, initial encounter for open fracture
S99.029B
Unspecified
Salter-Harris Type II physeal fracture of unspecified calcaneus, initial encounter for open fracture

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. S99.021B and S99.029B 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

S99.021BSalter-Harris Type II physeal fracture of right calcaneus, initial encounter for open fractureS99.029BSalter-Harris Type II physeal fracture of unspecified 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 II physeal fracture of right calcaneus, initial encounter for open fracture is a billable ICD-10-CM diagnosis code (S99.021B).Salter-Harris Type II physeal fracture of unspecified calcaneus, initial encounter for open fracture is a billable ICD-10-CM diagnosis code (S99.029B).
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

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