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.
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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