Oliguria and anuria

This code represents a significant decrease in urine output (oliguria) or a complete absence of urine production (anuria). These conditions indicate severe renal dysfunction or an obstruction in the urinary tract, requiring prompt medical evaluation.

Use this code when documentation explicitly states oliguria or anuria as a primary or secondary diagnosis. This often occurs in cases of acute kidney injury, end-stage renal disease, severe dehydration, or urinary tract obstruction. Supporting documentation should include urine output measurements or physician notes describing the reduced/absent urine flow.

• Always seek the underlying cause of oliguria/anuria, such as acute kidney failure (584.x) or chronic kidney disease (585.x), and code it as the primary diagnosis if known.
• Do not use this code if the reduced urine output is a normal physiological response (e.g., mild dehydration without renal impairment).
• Consider additional codes for associated symptoms or complications, such as fluid overload (276.6) or electrolyte imbalances (276.x).