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S92.421K vs S92.423K

S92.421K (Displaced fracture of distal phalanx of right great toe, subsequent encounter for fracture with nonunion) compared with S92.423K (Displaced fracture of distal phalanx of unspecified great toe, subsequent encounter for fracture with nonunion), from the official CMS tabular data. S92.421K and S92.423K code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S92.421K
Right
Displaced fracture of distal phalanx of right great toe, subsequent encounter for fracture with nonunion
S92.423K
Unspecified
Displaced fracture of distal phalanx of unspecified great toe, subsequent encounter for fracture with nonunion

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. S92.421K and S92.423K 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

S92.421KDisplaced fracture of distal phalanx of right great toe, subsequent encounter for fracture with nonunionS92.423KDisplaced fracture of distal phalanx of unspecified great toe, subsequent encounter for fracture with nonunion
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 distal phalanx of right great toe, subsequent encounter for fracture with nonunion is a billable ICD-10-CM diagnosis code (S92.421K).Displaced fracture of distal phalanx of unspecified great toe, subsequent encounter for fracture with nonunion is a billable ICD-10-CM diagnosis code (S92.423K).
7th characterThe appropriate 7th character is to be added to each code from category S92The appropriate 7th character is to be added to each code from category S92

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