Mixed acid-base balance disorder

This code signifies the presence of multiple acid-base disturbances occurring simultaneously, where the body's pH regulation is compromised by both acidotic and alkalotic processes. It indicates a complex physiological imbalance that cannot be attributed to a single acid-base disorder.

Use this code when diagnostic testing, such as arterial blood gas analysis, reveals evidence of more than one primary acid-base disorder (e.g., metabolic acidosis and respiratory alkalosis) in the same patient. Documentation should clearly identify the co-existence of these distinct imbalances.

• Ensure documentation explicitly states "mixed acid-base disorder" or describes the simultaneous presence of multiple primary acid-base disturbances.
• Do not use this code if only one primary acid-base disorder is identified, even if compensatory mechanisms are present.
• Sequence this code after the underlying cause(s) of the mixed disorder, if known and documented.