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S99.149K vs T33

S99.149K (Salter-Harris Type IV physeal fracture of unspecified metatarsal, subsequent encounter for fracture with nonunion) compared with T33 (Superficial frostbite), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Relationship

Informational

Excludes2 relationship

S99.149K
Salter-Harris Type IV physeal fracture of unspecified metatarsal, subsequent encounter for fracture with nonunion
T33
Superficial frostbite

Distinct conditions — both may be reported.

“frostbite (T33-T34)”

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source: CMS ICD-10-CM tabular instructional notes

Can these codes be reported together?

Yes, when both are documented. S99.149K carries an Excludes2 note covering T33: “frostbite (T33-T34)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

S99.149KSalter-Harris Type IV physeal fracture of unspecified metatarsal, subsequent encounter for fracture with nonunionT33Superficial frostbite
Billing statusBillableNon-billable header

Report instead: T33.011A, T33.011D, T33.011S, T33.012A, T33.012D

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 unspecified metatarsal, subsequent encounter for fracture with nonunion is a billable ICD-10-CM diagnosis code (S99.149K).Superficial frostbite is a non-billable ICD-10-CM category code (T33).
7th characterThe appropriate 7th character is to be added to each code from subcategories S99.1The appropriate 7th character is to be added to each code from category T33
Includes
frostbite with partial thickness skin loss

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