E87.0 – Hyperosmolality and hypernatremia

ICD-10-CM 2027 diagnosis code · Metabolic disorders

Billable code

ICD-10-CM code E87.0

Code: E87.0 (claims format: E870)
Description: Hyperosmolality and hypernatremia
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 4. Endocrine, nutritional and metabolic diseases (E00-E89)
Block: E70-E88 Metabolic disorders
Parent codes: E87

Notes for E87.0

Applicable to:

Sodium [Na] excess
Sodium [Na] overload

Excludes2 (not included here):

diabetes with hyperosmolarity (E08, E09, E11, E13 with final characters .00 or .01)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

E87 – Other disorders of fluid, electrolyte and acid-base balance

Excludes1 (not coded here):

diabetes insipidus (E23.2)
electrolyte imbalance associated with hyperemesis gravidarum (O21.1)
electrolyte imbalance following ectopic or molar pregnancy (O08.5)
familial periodic paralysis (G72.3)
metabolic acidemia in newborn, unspecified (P19.9)

Block E70-E88

Excludes1 (not coded here):

androgen insensitivity syndrome (E34.5-)
congenital adrenal hyperplasia (E25.0)
hemolytic anemias attributable to enzyme disorders (D55.-)
Marfan syndrome (Q87.4-)
5-alpha-reductase deficiency (E29.1)

Excludes2 (not included here):

Ehlers-Danlos syndromes (Q79.6-)

Index terms for E87.0

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in E87

E87.1 – Hypo-osmolality and hyponatremiaBillable
E87.2 – AcidosisHeader
E87.3 – AlkalosisBillable
E87.4 – Mixed disorder of acid-base balanceBillable
E87.5 – HyperkalemiaBillable
E87.6 – HypokalemiaBillable
E87.7 – Fluid overloadHeader
E87.8 – Other disorders of electrolyte and fluid balance, not elsewhere classifiedBillable

Frequently asked questions

What is ICD-10 code E87.0?

E87.0 is the ICD-10-CM code for hyperosmolality and hypernatremia, in the block E70-E88 (Metabolic disorders).

Is E87.0 a billable code?

Yes. E87.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does E87.0 belong to?

It belongs to category E87 – Other disorders of fluid, electrolyte and acid-base balance.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.