All ICD10 Codes
E87Not billable, use a more specific code below

Other disorders of fluid, electrolyte and acid-base balance

In Metabolic disorders (E70-E88), chapter 4: Endocrine, Nutritional and Metabolic Diseases

14 billable codes under E87: 8 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Excludes1: not coded here, use a different code

  • 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)

Also applies, from Metabolic disorders (E70-E88)

These notes sit on E70-E88 and apply to every code under it, including E87.

Excludes1: not coded here, use a different code

  • 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, code separately if applicable

  • Ehlers-Danlos syndromes (Q79.6-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers diabetes mellitus coding, including type, insulin and drug use, pump malfunction and secondary diabetes, plus obesity and obesity class codes.

Read Section I.C.4 (page 39)

All codes under E87

E87 can't be used on a claim. Pick a billable code below; grey headings group them.

E87 MS-DRGs

As the principal diagnosis, all 14 billable codes under E87 group to MS-DRG 640, 641, 791, or 793 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to E87

Notes on these codes point to E87.

  • E86 Use Additional Code: code(s) for any associated disorders of electrolyte and acid-base balance (E87.-)
  • R79.1 Excludes2: abnormality of fluid, electrolyte or acid-base balance (E86-E87)
  • T80-T88 Excludes2: disorders of fluid and electrolyte imbalance (E86-E87)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Fluid and Electrolyte Balance

Electrolytes are minerals that have an electric charge when they are dissolved in water or body fluids, including blood. The electric charge can be positive or negative. You have electrolytes in your blood, urine (pee), tissues, and other body fluids.

Read more about fluid and electrolyte balance on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.