Z04.9 is the ICD-10 code for Examination and observation for unspecified reason. It is a four-character subcategory of Z04 (Examination and observation for other reasons), the most specific level in the WHO edition. It belongs to the block Z00–Z13 (Persons encountering health services for examination and investigation) in Chapter XXI, Factors influencing health status and contact with health services.
- Code type
- Subcategory (4 characters)
- Chapter
- XXI · Z00–Z99
- Classification
- WHO ICD-10, 2019 version
What Z04.9 includes
Conditions and terms that are coded here.
- Observation NOS
Z04.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DZ049Kontakt mhp. undersøgelse og observation UNS
Z04.9Määrittämättömästä syystä tehty tarkastus ja tarkkailu
Z04.9Untersuchung und Beobachtung aus nicht näher bezeichnetem Grund
Z04.9Examen et mise en observation pour une raison non précisée
Z04.9onderzoek en observatie om niet-gespecificeerde reden
Z04.9Encounter for examination and observation for unspecified reason
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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