458.9
ICD-9-CMThis code represents a general diagnosis of abnormally low blood pressure without further specification of its cause or type. It indicates a systemic arterial pressure that is below the normal range for an individual, leading to potential symptoms such as dizziness or syncope, but the underlying etiology is unknown.
Use this code when documentation clearly states "hypotension" but provides no additional details regarding its origin (e.g., orthostatic, chronic, drug-induced, post-procedural). This code is appropriate when the provider has not yet determined the specific type or cause of the low blood pressure.
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