Z04.9
✓ Billable
Encounter for examination and observation for unspecified reason
ICD-10-CM · FY2026 · Factors Influencing Health Status
Code
Z04.9
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Factors Influencing Health Status
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Z04.9?
ICD-10-CM code Z04.9 represents Encounter for examination and observation for unspecified reason. It is a billable diagnosis code in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.
Is Z04.9 billable?
Yes. Z04.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is Z04.9 in?
Z04.9 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.
Related codes in the Z04 category
Z04
Encounter for examination and observation for other reasons
Non-billable
Z04.1
Encounter for examination and observation following transport accident
Billable
Z04.2
Encounter for examination and observation following work accident
Billable
Z04.3
Encounter for examination and observation following other accident
Billable
Z04.4
Encounter for examination and observation following alleged rape
Non-billable
Z04.6
Encounter for general psychiatric examination, requested by authority
Billable
Z04.7
Encounter for examination and observation following alleged physical abuse
Non-billable
Z04.8
Encounter for examination and observation for other specified reasons
Non-billable
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