ICD-10-CM 2027
ICD-10 code for Hyperosmolality
From the official ICD-10-CM alphabetic index entry “Hyperosmolality (see also, Diabetes, by type, with hyperosmolarity)”. Page updated September 29, 2026.
About coding Hyperosmolality
The ICD-10-CM code for Hyperosmolality is E87.0 (Hyperosmolality and hypernatremia).
Within E87 (other disorders of fluid, electrolyte and acid-base balance), E87.0 is specifically for Hyperosmolality and hypernatremia. Related codes cover Hypo-osmolality and hyponatremia (E87.1), acidosis (E87.2), Alkalosis (E87.3), mixed disorder of acid-base balance (E87.4), Hyperkalemia (E87.5), Hypokalemia (E87.6), fluid overload (E87.7) and other disorders of electrolyte and fluid balance, not elsewhere classified (E87.8).
The conditions in its Excludes2 note aren't part of E87.0, but may be coded alongside it if the patient has both: diabetes with hyperosmolarity (E08, E09, E11, E13 with final characters .00 or .01).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about Hyperosmolality ICD-10 codes
What is the ICD-10 code for Hyperosmolality?
- E87.0 — Hyperosmolality and hypernatremia.
Is E87.0 billable?
- Yes. E87.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E87.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E87.0 as a principal diagnosis.
Is E87.0 a CC or MCC?
- E87.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.