R45.0
ICD-10-CMThis code represents a state of unease, apprehension, or agitation that is not otherwise specified as a more definitive mental health condition. It describes a subjective feeling of being nervous, often without a clear underlying cause documented as a distinct psychiatric disorder. This is a symptom code, not a diagnosis of a specific mental illness.
Use this code when a patient presents with documented nervousness as a primary complaint or significant symptom, and no more specific psychiatric diagnosis (e.g., anxiety disorder, panic disorder) has been established or ruled out. It is appropriate when the physician's documentation explicitly uses terms like "nervousness" or "feeling nervous" without further diagnostic elaboration.
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