Z00.4 ICD-10-CM

ICD-10-CM code Z00.4 describes encounter for psychiatric mental health assessment. Routine mental health assessment/evaluation without abnormal findings. It is a billable, specific code valid for claim submission. It is grouped under the “Factors Influencing Health (Z Codes)” section of the mental, behavioral, and neurodevelopmental disorders chapter.

When to use Z00.4

Z codes report encounters and circumstances that affect health but are not themselves illnesses, such as screening visits, counseling encounters, and psychosocial stressors. Use them as primary or secondary codes to capture context that supports medical necessity. For Z00.4 specifically, routine mental health assessment/evaluation without abnormal findings.

Documentation & billing

Document the reason for the encounter or the specific psychosocial circumstance. Pair a Z code with a diagnosis code when a condition is also present.

Common pitfalls

• Using a Z code as the only diagnosis when a mental health condition is documented.
• Confusing a screening encounter (Z13.3-) with an established diagnosis.
• Omitting psychosocial stressors that support the treatment plan.

Common search terms for Z00.4

Clinicians often look up Z00.4 using plain-language terms. This code maps to:

Frequently asked questions