Hyperosmolality and hypernatremia

This code signifies a condition characterized by an abnormally high concentration of solutes in the blood (hyperosmolality) and elevated sodium levels in the bloodstream (hypernatremia). These two imbalances often occur together and indicate a significant fluid and electrolyte disturbance.

Use this code when documentation explicitly states hyperosmolality and hypernatremia, typically seen in cases of severe dehydration, impaired thirst mechanisms, or excessive sodium intake. It is appropriate when these conditions are not directly attributable to diabetes mellitus.

• Ensure documentation clearly distinguishes non-diabetic hyperosmolality from diabetic hyperosmolar states.
• Review the "Excludes 2" note carefully; if diabetes is present and causing the hyperosmolarity, use the appropriate diabetes code with the specified final characters.
• Consider sequencing this code as a principal diagnosis if it is the primary reason for the encounter, or as a secondary diagnosis if it is a co-morbidity.