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

ICD-10-CM 2027 diagnosis code · Metabolic disorders

Non-billable header

ICD-10-CM code E87

Code: E87 (claims format: E87)
Description: Other disorders of fluid, electrolyte and acid-base balance
Billable: No – use a more specific code below
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

Billable codes under E87

E87 is a header code and cannot be used on claims. Choose the most specific code:

E87.0 – Hyperosmolality and hypernatremiaBillable
E87.1 – Hypo-osmolality and hyponatremiaBillable
E87.2 – AcidosisHeader (more codes below)
E87.3 – AlkalosisBillable
E87.4 – Mixed disorder of acid-base balanceBillable
E87.5 – HyperkalemiaBillable
E87.6 – HypokalemiaBillable
E87.7 – Fluid overloadHeader (more codes below)
E87.8 – Other disorders of electrolyte and fluid balance, not elsewhere classifiedBillable

Notes for E87

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)

Notes inherited from parent codes

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

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-)

Frequently asked questions

What is ICD-10 code E87?

E87 is the ICD-10-CM code for other disorders of fluid, electrolyte and acid-base balance, in the block E70-E88 (Metabolic disorders).

Is E87 a billable code?

No. E87 is a header code with more specific child codes; report one of the billable codes listed above.

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.