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ICD-10-CM Current in FY 2027

R40.4

Transient alteration of awareness

Release
FY 2027
Effective
Official source (opens in a new tab)

Hierarchy

Where R40.4 sits in the official hierarchy. Each level is the code it is classified under.

  1. R40 Parent Somnolence, stupor and coma
  2. R40.4 This code Transient alteration of awareness

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Excludes1

neonatal coma ( P91.5 )

Inherited from R40 — Somnolence, stupor and coma

Excludes1

somnolence, stupor and coma in diabetes (E08-E13)

Inherited from R40 — Somnolence, stupor and coma

Excludes1

somnolence, stupor and coma in hepatic failure ( K72 .-)

Inherited from R40 — Somnolence, stupor and coma

Excludes1

somnolence, stupor and coma in hypoglycemia (nondiabetic) ( E15 )

Inherited from R40 — Somnolence, stupor and coma

Version History

How R40.4 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Transient alteration of awareness

  2. FY 2026 Effective

    Unchanged

    Transient alteration of awareness

Related Codes

Other codes under R40

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release
FY 2027
Effective
Source file
icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

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