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S90.30 vs T20

S90.30 (Contusion of unspecified foot) compared with T20 (Burn and corrosion of head, face, and neck), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2). MedCoder-derived

Can these codes be reported together?

Informational

Excludes2 relationship

S90.30
Contusion of unspecified foot
↔
T20
Burn and corrosion of head, face, and neck

What we found

Yes, when both are documented.S90.30 carries an Excludes2 note covering T20: “burns and corrosions (T20-T32)”

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

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

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 / rule

CMS ICD-10-CM tabular instructional notes

Side by side

S90.30Contusion of unspecified footT20Burn and corrosion of head, face, and neck
Billing statusNon-billable header

Report instead: S90.30XA, S90.30XD, S90.30XS

Non-billable header

Report instead: T20.00XA, T20.00XD, T20.00XS, T20.011A, T20.011D

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)
DefinitionContusion of unspecified foot is a non-billable ICD-10-CM category code (S90.30).Burn and corrosion of head, face, and neck is a non-billable ICD-10-CM category code (T20).
7th characterThe appropriate 7th character is to be added to each code from category S90The appropriate 7th character is to be added to each code from category T20
Includes
Contusion of foot NOS
burns and corrosions of first degree [erythema]
burns and corrosions of second degree [blisters][epidermal loss]
burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
Excludes2
contusion of toes (S90.1-, S90.2-)
burns and corrosions (T20-T32)
fracture of ankle and malleolus (S82.-)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)
burn and corrosion of ear drum (T28.41, T28.91)
burn and corrosion of eye and adnexa (T26.-)
burn and corrosion of mouth and pharynx (T28.0)
Use additional code—
code from category T31 or T32 to identify extent of body surface involved

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

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Derived from the official CMS ICD-10-CM tabular data (FY2026). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources