W00-W19 vs X00

W00-W19 (Slipping, tripping, stumbling and falls (W00-W19)) compared with X00 (Exposure to uncontrolled fire in building or structure), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because W00-W19 lists X00 under Excludes2, which marks them as distinct conditions.

Official rule

What is different?

The conditions named.W00-W19 is “Slipping, tripping, stumbling and falls (W00-W19)”; X00 is “Exposure to uncontrolled fire in building or structure”.

Registry fact

Can these codes be reported together?

Yes, when both are documented.W00-W19 lists X00 under Excludes2: “fall (in) (from) burning building (X00.-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. W00-W19 carries 5 Excludes1 notes and X00 carries 1 Excludes1 note covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.W00-W19’s tabular entry: “fall (in) (from) burning building (X00.-)”. The note covers X00.

Official ruleGuide: Excludes1 vs Excludes2

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?

Both are headers.Both are non-billable headers, and neither contains the other.

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?

Informational

Excludes2 relationship

W00-W19

Slipping, tripping, stumbling and falls (W00-W19)

↔

X00

Exposure to uncontrolled fire in building or structure

What we found

Yes, when both are documented.W00-W19 carries an Excludes2 note covering X00: “fall (in) (from) burning building (X00.-)”

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 Excludes2 Check 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

Official guidance behind these answers

Section I.A.12.b — Excludes2 · applies to: Excludes2
A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
ICD-10-CM Official Guidelines FY2027

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

	W00-W19Slipping, tripping, stumbling and falls (W00-W19)	X00Exposure to uncontrolled fire in building or structure
Billing status	Non-billable header	Non-billable header Report instead: X00.0XXA, X00.0XXD, X00.0XXS, X00.1XXA, X00.1XXD
Classification	V00-Y99 — External Causes of Morbidity (V00-Y99)	V00-Y99 — External Causes of Morbidity (V00-Y99)
Definition	Slipping, tripping, stumbling and falls (W00-W19) is a non-billable ICD-10-CM category code (W00-W19).	Exposure to uncontrolled fire in building or structure is a non-billable ICD-10-CM category code (X00).
7th character	—	The appropriate 7th character is to be added to each code from category X00
Includes	—	conflagration in building or structure
Excludes1	assault involving a fall (Y01-Y02) fall from animal (V80.-) fall (in) (from) machinery (in operation) (W28-W31) fall (in) (from) transport vehicle (V01-V99) intentional self-harm involving a fall (X80-X81)	arson (X97)
Excludes2	at risk for fall (history of fall) Z91.81 fall (in) (from) burning building (X00.-) fall into fire (X00-X04, X08)	Exposure to ignition or melting of nightwear (X05) Exposure to ignition or melting of other clothing and apparel (X06.-) Exposure to other specified smoke, fire and flames (X08.-) explosions (W35-W40) lightning (T75.0-) transport accident (V01-V99)
Code first	—	any associated cataclysm

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