2026 ICD-10-CM Diagnosis Code E87.79Other fluid overload

ICD-10-CM Codes›E00–E89›E70-E88›E87

ICD-10-CM E87.79
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E87.79 is a billable ICD-10-CM diagnosis code for other fluid overload. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 640 through 641. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fluid and electrolyte disorders.

Code Identity

ICD-10-CM Code
E87.79
Billable Status
Yes — Valid for Submission
Code Describes
Other fluid overload
Short Description
Other fluid overload
Same as the full description in the CMS dataset.
Parent Code
E87.7
Fluid overload

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE70-E88Metabolic disorders
CategoryE87Other disorders of fluid, electrolyte and acid-base balance
This CodeE87.79Other fluid overload

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Excess interdialytic weight gain
  • Hypervolemia
  • Intraoperative fluid overload
  • Volume excess, disturbed Starling forces
  • Volume excess, primary hormone excess
  • Volume excess, primary renal sodium retention
  • Water intoxication syndrome

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Fluid
      • overload
        • specified NEC
    • Hypervolemia
      • specified NEC
    • Intoxication
      • water
    • Overload
      • fluid
        • specified NEC
    • Poisoning(acute)
      • water
    • Syndrome
      • water retention
    • Water
      • intoxication
    • Water
      • poisoning

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR END011
Fluid and electrolyte disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

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.

The full article covers:

  • What are electrolytes?
  • What are the different types of electrolytes in your body?
  • What is an electrolyte imbalance?
  • What are the different types of electrolyte imbalances?
  • How are electrolyte imbalances diagnosed?
  • What are the treatments for electrolyte imbalances?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert E87.79 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
276.69 Fluid overload NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E87.79Overview

Is E87.79 (Fluid overload) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other fluid overload on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does E87.79 group to?

When other fluid overload is the principal diagnosis on an inpatient stay, it groups to MS-DRG 640, 641, with relative weights from 0.7782 to 1.3356 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of E87.79?

Under the General Equivalence Mappings, other fluid overload converts to ICD-9-CM 276.69 (fluid overload NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.