X08.8XXS ICD-10-CM Code: Exposure to other specified smoke, fire and flames, sequela

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for X08.8XXS in the official ICD-10-CM tabular list, quoted as published.

Notes without a marker are published on X08.8XXS itself; “inherited from” names the category or block whose note applies here.

7th Character Guide

"The appropriate 7th character is to be added to each code from category X08"

• A — initial encounter
• D — subsequent encounter
• S — sequela (this page’s code)

How the encounter character is assigned. “Initial encounter” means the patient is receiving active treatment for the condition — it is not limited to the first visit, and a different or new provider giving active treatment still assigns it. “Subsequent encounter” covers care during the healing or recovery phase after active treatment. “Sequela” is for complications or conditions that arise as a direct result of the original condition.

ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.a (paraphrased by MedCoder).

Variant codes in this family

X08.8XXA, X08.8XXD, X08.8XXS

Character meanings are CMS's official 7th-character extensions for this family, as carried in each variant code's official description; variant codes are registry rows. The explanation of how the encounter character is assigned is MedCoder editorial, distinct from the official content above it.

Do Not Confuse With

Codes named in X08.8XXS's own official notes, or sharing its encounter family, with what separates them. Each links to the full comparison.

• X97— Excludes1 conflict (Conflict)

  Not coded here — these two are mutually exclusive.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  Full comparison: X08.8XXS vs X97 →

• X08.8XXA— Encounter relationship (Review)

  Same underlying diagnosis, different encounter phase.

  The same diagnosis at a different phase of care; one encounter takes one 7th character.

  Full comparison: X08.8XXS vs X08.8XXA →

• X08.8XXD— Encounter relationship (Review)

  Same underlying diagnosis, different encounter phase.

  The same diagnosis at a different phase of care; one encounter takes one 7th character.

  Full comparison: X08.8XXS vs X08.8XXD →

• W35— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  Full comparison: X08.8XXS vs W35 →

• W40— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  Full comparison: X08.8XXS vs W40 →

• T75.0— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  Full comparison: X08.8XXS vs T75.0 →

Relationships are read from this code's own official notes and its encounter family; the wording of each distinction is MedCoder editorial. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

1. A 7th character applies in this family. Confirm the documented encounter matches the character assigned. See the official 7th-character definitions and this code’s variants
2. 1 Excludes1 entry — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
3. 3 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

• Principal-diagnosis restriction. External cause of morbidity codes (V, W, X and Y) describe the circumstance that caused an injury, not the condition treated. The Medicare Code Editor rejects them as a principal diagnosis; sequence the injury or condition first and report this code as secondary.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

Other codes that name X08.8XXS or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 11 Excludes1 notes: X10 — Contact with hot drinks, food, fats and cooking oils (via X08.-), X10-X19 — Contact with heat and hot substances (X10-X19) (via X08.-), X11 — Contact with hot tap-water (via X08.-), X12 — Contact with other hot fluids (via X08.-), X13 — Contact with steam and other hot vapors (via X08.-), X14 — Contact with hot air and other hot gases (via X08.-), X15 — Contact with hot household appliances (via X08.-), X16 — Contact with hot heating appliances, radiators and pipes (via X08.-), X17 — Contact with hot engines, machinery and tools (via X08.-), X18 — Contact with other hot metals (via X08.-), X19 — Contact with other heat and hot substances (via X08.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Excludes2 note: X00 — Exposure to uncontrolled fire in building or structure (via X08.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 31 Use Additional Code instructions: T20.0 — Burn of unspecified degree of head, face, and neck (via X08.-), T20.1 — Burn of first degree of head, face, and neck (via X08.-), T20.2 — Burn of second degree of head, face, and neck (via X08.-), T20.3 — Burn of third degree of head, face, and neck (via X08.-), T21.0 — Burn of unspecified degree of trunk (via X08.-), T21.1 — Burn of first degree of trunk (via X08.-), T21.2 — Burn of second degree of trunk (via X08.-), T21.3 — Burn of third degree of trunk (via X08.-), T22.0 — Burn of unspecified degree of shoulder and upper limb, except wrist and hand (via X08.-), T22.1 — Burn of first degree of shoulder and upper limb, except wrist and hand (via X08.-), T22.2 — Burn of second degree of shoulder and upper limb, except wrist and hand (via X08.-), T22.3 — Burn of third degree of shoulder and upper limb, except wrist and hand (via X08.-), T23.0 — Burn of unspecified degree of wrist and hand (via X08.-), T23.1 — Burn of first degree of wrist and hand (via X08.-), T23.2 — Burn of second degree of wrist and hand (via X08.-), T23.3 — Burn of third degree of wrist and hand (via X08.-), T24.0 — Burn of unspecified degree of lower limb, except ankle and foot (via X08.-), T24.1 — Burn of first degree of lower limb, except ankle and foot (via X08.-), T24.2 — Burn of second degree of lower limb, except ankle and foot (via X08.-), T24.3 — Burn of third degree of lower limb, except ankle and foot (via X08.-), +11 more.

These codes instruct coders to additionally report this code when it applies.

Clinical classification (AHRQ CCSR):EXT030 — External cause codes: sequela.

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (External cause codes: sequela).

+2321 more

Contextual Map

Every relationship of X08.8XXS in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run X08.8XXS with these 17 related codes in Claim Check

Hierarchy

• V00-Y99 — Chapter 20: External Causes of Morbidity (V00-Y99) (V00-Y99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• W00-X58 — Other external causes of accidental injury[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X00-X08 — Exposure to smoke, fire and flames[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes (11)

• X10 — Contact with hot drinks, food, fats and cooking oils[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• X10-X19 — Contact with heat and hot substances (X10-X19)[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• X11 — Contact with hot tap-water[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• X12 — Contact with other hot fluids[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• X13 — Contact with steam and other hot vapors[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• X14 — Contact with hot air and other hot gases[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• X15 — Contact with hot household appliances[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• X16 — Contact with hot heating appliances, radiators and pipes[Excludes1](via X08.-): “exposure to fire and flames (X00-X08)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• and 3 more

Referenced by Excludes2 notes

• X00 — Exposure to uncontrolled fire in building or structure[Excludes2](via X08.-): “Exposure to other specified smoke, fire and flames (X08.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Use Additional Code instructions (31)

• T20.0 — Burn of unspecified degree of head, face, and neck[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T20.1 — Burn of first degree of head, face, and neck[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T20.2 — Burn of second degree of head, face, and neck[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T20.3 — Burn of third degree of head, face, and neck[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T21.0 — Burn of unspecified degree of trunk[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T21.1 — Burn of first degree of trunk[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T21.2 — Burn of second degree of trunk[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T21.3 — Burn of third degree of trunk[Use Additional Code](via X08.-): “external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• and 23 more

Clinical classification (CCSR)

• EXT030 — External cause codes: sequela[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

Nearest codes (40)

• X08 — Exposure to other specified smoke, fire and flames[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X08.00XA — Exposure to bed fire due to unspecified burning material, initial encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X08.00XD — Exposure to bed fire due to unspecified burning material, subsequent encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X08.00XS — Exposure to bed fire due to unspecified burning material, sequela[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X08.01 — Exposure to bed fire due to burning cigarette[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X08.01XA — Exposure to bed fire due to burning cigarette, initial encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X08.01XD — Exposure to bed fire due to burning cigarette, subsequent encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• X08.01XS — Exposure to bed fire due to burning cigarette, sequela[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 32 more

Change history

• FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Common coding questions

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to X08.8XXS in its code family, with their registry titles.

• X08.21 — Exposure to other furniture fire due to burning cigarette
• X08.21XA — Exposure to other furniture fire due to burning cigarette, initial encounter
• X08.21XD — Exposure to other furniture fire due to burning cigarette, subsequent encounter
• X08.21XS — Exposure to other furniture fire due to burning cigarette, sequela
• X08.29 — Exposure to other furniture fire due to other burning material
• X08.29XA — Exposure to other furniture fire due to other burning material, initial encounter
• X08.29XD — Exposure to other furniture fire due to other burning material, subsequent encounter
• X08.29XS — Exposure to other furniture fire due to other burning material, sequela
• X08.8 — Exposure to other specified smoke, fire and flames
• X08.8XXA — Exposure to other specified smoke, fire and flames, initial encounter

View all codes in the X08 family