Z04.9
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BillableEncounter for examination and observation for unspecified reason
Z04.9 is the ICD-10-CM code for Encounter for examination and observation for unspecified reason. It is a billable, specific code valid for reimbursement.
Z00-Z99 Factors influencing health status and contact with health services
Includes
- •Encounter for observation NOS
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
- What is ICD-10 code Z04.9?
- Z04.9 is the ICD-10-CM code for "Encounter for examination and observation for unspecified reason". It falls under Z00-Z99 Factors influencing health status and contact with health services.
- Is Z04.9 a billable code?
- Yes — Z04.9 is a billable, specific ICD-10-CM code valid for reimbursement.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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