Disorders of phosphorus metabolism

This code signifies abnormalities in the body's phosphorus levels, which can manifest as either hypophosphatemia (low phosphorus) or hyperphosphatemia (high phosphorus). These imbalances can affect bone health, energy metabolism, and cellular function, often stemming from underlying kidney, parathyroid, or nutritional issues.

Assign this code when documentation explicitly states a diagnosis of phosphorus imbalance, such as hypophosphatemia or hyperphosphatemia. This includes conditions like familial hypophosphatemia, tumor-induced osteomalacia, or phosphorus retention due to chronic kidney disease. Supporting documentation should include laboratory results confirming abnormal phosphorus levels and a physician's diagnostic statement.

• Do not use this code for isolated abnormal lab findings without a physician's confirmed diagnosis of a phosphorus metabolism disorder.
• Specify the underlying cause of the phosphorus imbalance whenever possible, using additional codes (e.g., E83.31 for hypophosphatemia, E83.32 for hyperphosphatemia in ICD-10-CM).
• Ensure the medical record clearly distinguishes between acute and chronic phosphorus disorders if applicable, as this may impact coding in other code sets.