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ICD-10-CM Current in FY 2027

R99

Ill-defined and unknown cause of mortality

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

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files.

Inclusion Terms

Death (unexplained) NOS

Inclusion Terms

Unspecified cause of mortality

Version History

How R99 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Ill-defined and unknown cause of mortality

  2. FY 2026 Effective

    Unchanged

    Ill-defined and unknown cause of mortality

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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