Chronic idiopathic constipation

This code identifies a persistent and unexplained difficulty with bowel movements, characterized by infrequent stools, straining, or a sensation of incomplete evacuation, without an identifiable underlying cause such as a structural abnormality, medication side effect, or systemic disease. It signifies a long-standing constipation that is not attributable to other medical conditions.

Apply this code when documentation clearly indicates a diagnosis of chronic constipation where extensive workup has ruled out secondary causes. This code is appropriate when the provider explicitly states "idiopathic" or "functional" constipation that has persisted for at least three months. Supporting documentation should include a history of chronic constipation and negative findings from diagnostic investigations.

• Ensure the documentation specifies "idiopathic" or "functional" to differentiate from other types of constipation.
• Do not use this code if a secondary cause for the constipation (e.g., medication-induced, irritable bowel syndrome with constipation) is identified; instead, code the underlying condition.
• Consider sequencing this code as a primary diagnosis when it is the main reason for the encounter, or as a secondary diagnosis if it is a co-morbidity impacting patient management.