ICD-10 block

R95–R99 Ill-defined and unknown causes of mortality

The block R95–R99 of ICD-10 is titled “Ill-defined and unknown causes of mortality”. It is part of Chapter XVIII, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified, and holds 4 groups.

What R95–R99 excludes

Conditions that look similar but belong under another code.

  • fetal death of unspecified cause P95
  • obstetric death NOS O95

Codes in R95–R99

Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.

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