E87.0 Hyperosmolality and hypernatremia

The ICD-10-CM code for Hyperosmolality and hypernatremia is E87.0 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

4: Endocrine, nutritional and metabolic diseases (E00-E89)

Section

E70-E88: Metabolic disorders (E70-E88)

Category E87

17 codes (14 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to E87.0:

• Hypernatremia
• Hyperosmolality (see also, Diabetes, by type, with hyperosmolarity)
• Syndrome › hyperosmolarity (see also, Diabetes, by type, with hyperosmolarity)
• Excess, excessive, excessively › natrium
• Overload › sodium (Na)
• Syndrome › hypernatremia
• Excess, excessive, excessively › sodium (Na)
• Edema, edematous (infectious) (pitting) (toxic) › salt

Inclusion Terms

• Sodium [Na] excess
• Sodium [Na] overload

U.S. Hospital Utilization

• An estimated 633,990 U.S. inpatient stays in 2023 included E87.0 among the documented diagnoses.
• 12,005 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Diabetes mellitus (TOC entry)

a. Diabetes mellitus ................................................................................................................... 39

Obesity (TOC entry)

b. Obesity .................................................................................................................................. 42

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)