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S90.1 vs S90.31XD

S90.1 (Contusion of toe without damage to nail) compared with S90.31XD (Contusion of right foot, subsequent encounter), 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

S90.31XD
Contusion of right foot, subsequent encounter
↔
S90.1
Contusion of toe without damage to nail

What we found

Yes, when both are documented.S90.31XD carries an Excludes2 note covering S90.1: “contusion of toes (S90.1-, S90.2-)”

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

S90.1Contusion of toe without damage to nailS90.31XDContusion of right foot, subsequent encounter
Billing statusNon-billable header

Report instead: S90.111A, S90.111D, S90.111S, S90.112A, S90.112D

Billable
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 toe without damage to nail is a non-billable ICD-10-CM category code (S90.1).Contusion of right foot, subsequent encounter is a billable ICD-10-CM diagnosis code (S90.31XD).
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 S90
Excludes2
burns and corrosions (T20-T32)
fracture of ankle and malleolus (S82.-)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)
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)

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