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X77 ICD-10-CM Code: Intentional self-harm by steam, hot vapors and hot objects

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Billing Status: NO. This is a non-billable ICD-10-CM code: report a more specific billable code beneath it.

Coding at a Glance

7th character
Required — characters A · D · S

Category · FY2027A non-billable heading in the tabular list: report a more specific code beneath it.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

The tabular list publishes no instructional note for this code itself.

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

7th Character Guide

"The appropriate 7th character is to be added to each code from category X77"

  • A — initial encounter
  • D — subsequent encounter
  • S — sequela

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

X77.0XXA, X77.0XXD, X77.0XXS, X77.1XXA, X77.1XXD, X77.1XXS, X77.2XXA, X77.2XXD

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.

Coder workflow for X77

MedCoder structured workflow — derived from this code’s own official record

Before you code X77

  1. X77 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewX77.0, X77.1, X77.2, X77.3, X77.8, X77.9

    See the relationships section · Guide: How to choose an ICD-10-CM code →

  2. A 7th character is required in this family. Confirm the documented encounter: initial (active treatment), subsequent (healing or recovery phase), or sequela. X77 is not valid without one. “Initial” means active treatment, not the first visit (Guidelines I.C.19.a).

    See the 7th Character Guide · Guide: 7th characters: initial, subsequent, sequela →

  3. An external cause code is reported in addition to the code for the injury or condition, never as the principal or first-listed diagnosis. Confirm the cause, intent, place of occurrence, activity and status where the record documents them, and assign the 7th character that matches the injury code. External cause coding guidelines (Guidelines I.C.20.a).

Choose the right path

  1. Does the documentation support one of the more specific codes beneath X77?
    Yes → Select that code and continue the checks below on its own page.
    No → X77 cannot be reported as written; query for the specificity its subcategory needs.

    ReviewX77.0, X77.1, X77.2, X77.3, X77.8, X77.9

  2. Is the encounter phase documented — active treatment, healing or recovery, or a sequela?
    Yes → Assign the matching 7th character; the variant codes are in the 7th Character Guide.
    No → The code is invalid without its 7th character — query for the missing element.

Consider X77. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Encounter type
Active treatment, healing or recovery phase, or sequela — the basis of the 7th character (Guidelines I.C.19.a).

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: The patient returns during the healing or recovery phase after active treatment of the same condition.

Coding question: Which 7th character applies?

Path: Review the official 7th-character definitions for this family in the 7th Character Guide.

Reason: “Initial encounter” means active treatment, not the first visit; care during recovery takes “subsequent encounter”, and a complication arising from the original condition takes “sequela” (Guidelines I.C.19.a).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse X77 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of X77 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • X77.0XXA— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

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

    What moves you there: Documentation of a initial encounter moves the case to X77.0XXA.

    Full comparison: X77 vs X77.0XXA →

  • X77.0XXD— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

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

    What moves you there: Documentation of a subsequent encounter moves the case to X77.0XXD.

    Full comparison: X77 vs X77.0XXD →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Intentional self-harm by steam, hot vapors and hot objects is a non-billable ICD-10-CM category code (X77). A more specific billable subcode must be selected for claims submission.

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Verify Before Coding

  • Not billable as written — a more specific code is required: X77.0XXA, X77.0XXD, X77.0XXS, X77.1XXA, X77.1XXD.
  • Requires a 7th character. "The appropriate 7th character is to be added to each code from category X77" Options: X77.0XXA, X77.0XXD, X77.0XXS, X77.1XXA, X77.1XXD, X77.1XXS
  • 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

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name X77 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 27 Excludes1 notes: W20 — Struck by thrown, projected or falling object, W20-W49 — Exposure to inanimate mechanical forces (W20-W49), W21 — Striking against or struck by sports equipment, W22 — Striking against or struck by other objects, W23 — Caught, crushed, jammed or pinched in or between objects, W24 — Contact with lifting and transmission devices, not elsewhere classified, W25 — Contact with sharp glass, W26 — Contact with other sharp objects, W27 — Contact with nonpowered hand tool, W28 — Contact with powered lawn mower, W29 — Contact with other powered hand tools and household machinery, W30 — Contact with agricultural machinery, W31 — Contact with other and unspecified machinery, W32 — Accidental handgun discharge and malfunction, W33 — Accidental rifle, shotgun and larger firearm discharge and malfunction, W34 — Accidental discharge and malfunction from other and unspecified firearms and guns, W35 — Explosion and rupture of boiler, W36 — Explosion and rupture of gas cylinder, W37 — Explosion and rupture of pressurized tire, pipe or hose, W38 — Explosion and rupture of other specified pressurized devices, +7 more.

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

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

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

Contextual Map

Every relationship of X77 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 X77 with these 16 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes (27)

Referenced by Use Additional Code instructions (31)

  • T20.0 — Burn of unspecified degree of head, face, and neck[Use Additional Code]: “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-fy2027
  • T20.1 — Burn of first degree of head, face, and neck[Use Additional Code]: “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-fy2027
  • T20.2 — Burn of second degree of head, face, and neck[Use Additional Code]: “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-fy2027
  • T20.3 — Burn of third degree of head, face, and neck[Use Additional Code]: “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-fy2027
  • T21.0 — Burn of unspecified degree of trunk[Use Additional Code]: “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-fy2027
  • T21.1 — Burn of first degree of trunk[Use Additional Code]: “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-fy2027
  • T21.2 — Burn of second degree of trunk[Use Additional Code]: “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-fy2027
  • T21.3 — Burn of third degree of trunk[Use Additional Code]: “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-fy2027
  • and 23 more

Nearest codes (24)

Change history

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

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Common coding questions

MedCoder editorial

Can X77 be billed directly?

No. X77 (Intentional self-harm by steam, hot vapors and hot objects) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does X77 require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category X77; A: initial encounter; D: subsequent encounter; S: sequela.

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 FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 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-derived 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 editorial 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.

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 20, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "X77 — Intentional self-harm by steam, hot vapors and hot objects." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/x77-intentional-self-harm-by-steam-hot-vapors-and-hot-objects

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Intentional self-harm by steam, hot vapors and hot objects

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to X77 in its code family, with their registry titles.