ICD-10-CM 2027
ICD-10 code for potassium K intoxication
From the official ICD-10-CM alphabetic index entry “Intoxication › potassium (K)”. Page updated September 29, 2026.
About coding potassium K intoxication
The ICD-10-CM code for potassium K intoxication is E87.5 (Hyperkalemia).
Within E87 (other disorders of fluid, electrolyte and acid-base balance), E87.5 is specifically for Hyperkalemia. Related codes cover Hyperosmolality and hypernatremia (E87.0), Hypo-osmolality and hyponatremia (E87.1), acidosis (E87.2), Alkalosis (E87.3), mixed disorder of acid-base balance (E87.4), Hypokalemia (E87.6), fluid overload (E87.7) and other disorders of electrolyte and fluid balance, not elsewhere classified (E87.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC, relative weight 1.3395), DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC, relative weight 0.7865), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about potassium K intoxication ICD-10 codes
What is the ICD-10 code for potassium K intoxication?
- E87.5 — Hyperkalemia.
Is E87.5 billable?
- Yes. E87.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E87.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E87.5 as a principal diagnosis.
Is E87.5 a CC or MCC?
- No. E87.5 is neither a CC nor an MCC under MS-DRG v44.0.