Z04Header code — not billable
Encounter for examination and observation for other reasons
- Chapter
- 21. Factors influencing health status and contact with health services
- Category
- Z04
- Effective date
- October 1, 2026
Related codes in category Z04
Z04.1Encounter for exam and obs following transport accidentYesZ04.2Encounter for exam and observation following work accidentYesZ04.3Encounter for exam and observation following oth accidentYesZ04.4Encounter for exam and observation following alleged rapeZ04.41Encounter for exam and obs following alleged adult rapeYesZ04.42Encounter for exam and obs following alleged child rapeYesZ04.6Encntr for general psychiatric exam, requested by authorityYesZ04.7Encounter for exam and obs following alleged physical abuseZ04.71Encntr for exam and obs fol alleged adult physical abuseYesZ04.72Encntr for exam and obs fol alleged child physical abuseYesZ04.8Encounter for examination and observation for oth reasonsZ04.81Enctr for exam and obs of victim fol forced sex exploitationYes
Frequently asked questions
What is ICD-10 code Z04?
Z04 is an ICD-10-CM diagnosis code for Encounter for examination and observation for other reasons.
Is Z04 a billable code?
No. Z04 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is Z04 in?
Z04 falls under Chapter 21: Factors influencing health status and contact with health services.
When did Z04 become effective?
Z04 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to Z04?
Z04 belongs to category Z04, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.