Z04: Encounter for examination and observation for other reasons
Codes under Z04 (Encounter for examination and observation for other reasons). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Z04.1 | Encounter for examination and observation following transport accident | ✓ |
| Z04.1 | Encounter for examination and observation following transport accident | ✓ |
| Z04.2 | Encounter for examination and observation following work accident | ✓ |
| Z04.2 | Encounter for examination and observation following work accident | ✓ |
| Z04.3 | Encounter for examination and observation following other accident | ✓ |
| Z04.3 | Encounter for examination and observation following other accident | ✓ |
| Z04.4 | Encounter for examination and observation following alleged rape | — |
| Z04.4 | Encounter for examination and observation following alleged rape | — |
| Z04.6 | Encounter for general psychiatric examination, requested by authority | ✓ |
| Z04.6 | Encounter for general psychiatric examination, requested by authority | ✓ |
| Z04.7 | Encounter for examination and observation following alleged physical abuse | — |
| Z04.7 | Encounter for examination and observation following alleged physical abuse | — |
| Z04.8 | Encounter for examination and observation for other specified reasons | — |
| Z04.8 | Encounter for examination and observation for other specified reasons | — |
| Z04.9 | Encounter for examination and observation for unspecified reason | ✓ |
| Z04.9 | Encounter for examination and observation for unspecified reason | ✓ |
| Z04.41 | Encounter for examination and observation following alleged adult rape | ✓ |
| Z04.41 | Encounter for examination and observation following alleged adult rape | ✓ |
| Z04.42 | Encounter for examination and observation following alleged child rape | ✓ |
| Z04.42 | Encounter for examination and observation following alleged child rape | ✓ |
| Z04.71 | Encounter for examination and observation following alleged adult physical abuse | ✓ |
| Z04.71 | Encounter for examination and observation following alleged adult physical abuse | ✓ |
| Z04.72 | Encounter for examination and observation following alleged child physical abuse | ✓ |
| Z04.72 | Encounter for examination and observation following alleged child physical abuse | ✓ |
| Z04.81 | Encounter for examination and observation of victim following forced sexual exploitation | ✓ |
| Z04.81 | Encounter for examination and observation of victim following forced sexual exploitation | ✓ |
| Z04.82 | Encounter for examination and observation of victim following forced labor exploitation | ✓ |
| Z04.82 | Encounter for examination and observation of victim following forced labor exploitation | ✓ |
| Z04.89 | Encounter for examination and observation for other specified reasons | ✓ |
| Z04.89 | Encounter for examination and observation for other specified reasons | ✓ |
Frequently asked questions
What is ICD-10-CM code Z04?
Z04 is an ICD-10-CM category covering Encounter for examination and observation for other reasons. It contains 30 more specific diagnosis codes, 24 of which are billable.
Is Z04 a billable code?
No — Z04 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Z04.1 — Encounter for examination and observation following transport accident). 24 of the 30 codes under Z04 are billable.
What codes fall under Z04?
Z04 includes Z04.1, Z04.1, Z04.2, Z04.2, Z04.3, plus 25 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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