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V86.66XS vs W31

V86.66XS (Passenger of dirt bike or motor/cross bike injured in nontraffic accident, sequela) compared with W31 (Contact with other and unspecified machinery), from the official CMS tabular data.

Summary

These codes should not be reported together because V86.66XS’s tabular entry lists W31 under Excludes1.

Official rule
What is different?

The conditions named and billing status.V86.66XS is “Passenger of dirt bike or motor/cross bike injured in nontraffic accident, sequela”; W31 is “Contact with other and unspecified machinery”. W31 is a non-billable header; V86.66XS is billable.

Registry fact

Can these codes be reported together?

No.V86.66XS’s entry carries an Excludes1 note covering W31: “special all-terrain vehicle in stationary use or maintenance (W31.-)”. Both may be reported only when the documentation shows the two conditions are unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

Yes.V86.66XS’s tabular entry: “special all-terrain vehicle in stationary use or maintenance (W31.-)”. The note covers W31.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes2 relationship?

None.Neither entry carries an Excludes2 note that names the other code.

Official rule

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

One is a header.W31 is a non-billable header, but V86.66XS is not one of its subdivisions.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Conflict

Excludes1 conflict

V86.66XS
Passenger of dirt bike or motor/cross bike injured in nontraffic accident, sequela
↔
W31
Contact with other and unspecified machinery

What we found

No — do not report together.V86.66XS carries an Excludes1 note covering W31: “special all-terrain vehicle in stationary use or maintenance (W31.-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

What to review

Report one of the two. Both may be reported only when the documentation shows the two conditions are unrelated to each other.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.

Source / rule

CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a

Official guidance behind these answers

  • Section I.A.12.a — Excludes1 · applies to: Excludes1

    A type 1 Excludes note is a pure excludes note. It means “NOT CODED HERE!” An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition. An exception to the Excludes1 definition is the circumstance when the two conditions are unrelated to each other. If it is not clear whether the two conditions involving an Excludes1 note are related or not, query the provider. For example, code F45.8, Other somatoform disorders, has an Excludes1 note for "sleep related teeth grinding (G47.63)," because "teeth grinding" is an inclusion term under F45.8. Only one of these two codes should be assigned for teeth grinding. However psychogenic dysmenorrhea is also an inclusion term under F45.8, and a patient could have both this condition and sleep related teeth grinding. In this case, the two conditions are clearly unrelated to each other, and so it would be appropriate to report F45.8 and G47.63 together.

    ICD-10-CM Official Guidelines FY2026

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

V86.66XSPassenger of dirt bike or motor/cross bike injured in nontraffic accident, sequelaW31Contact with other and unspecified machinery
Billing statusBillableNon-billable header

Report instead: W31.0XXA, W31.0XXD, W31.0XXS, W31.1XXA, W31.1XXD

ClassificationV00-Y99 — External Causes of Morbidity (V00-Y99)V00-Y99 — External Causes of Morbidity (V00-Y99)
DefinitionPassenger of dirt bike or motor/cross bike injured in nontraffic accident, sequela is a billable ICD-10-CM diagnosis code (V86.66XS).Contact with other and unspecified machinery is a non-billable ICD-10-CM category code (W31).
7th characterThe appropriate 7th character is to be added to each code from category V86The appropriate 7th character is to be added to each code from category W31
Excludes1
special all-terrain vehicle in stationary use or maintenance (W31.-)
sport-utility vehicle (V50-V59)
three-wheeled motor vehicle designed for on-road use (V30-V39)
contact with agricultural machinery (W30.-)
contact with machinery in transport under own power or being towed by a vehicle (V01-V99)
exposure to electric current (W86)
assault (X92-Y09)
contact or collision with animals or persons (W50-W64)
exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
intentional self-harm (X71-X83)

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 (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources