2026 ICD-10-CM Diagnosis Code R04.0Epistaxis

ICD-10-CM Codes›R00–R99›R00-R09›R04

ICD-10-CM R04.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R04.0 is a billable ICD-10-CM diagnosis code for epistaxis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 150 through 151. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Respiratory signs and symptoms.

Code Identity

ICD-10-CM Code
R04.0
Billable Status
Yes — Valid for Submission
Code Describes
Epistaxis
Short Description
Epistaxis
Same as the full description in the CMS dataset.
Parent Code
R04
Hemorrhage from respiratory passages

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR00-R09Symptoms and signs involving the circulatory and respiratory systems
CategoryR04Hemorrhage from respiratory passages
This CodeR04.0Epistaxis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anterior epistaxis
  • Bleeding from nose
  • Blood in nasal cavity
  • Contents of anterior nasal cavity - finding
  • Evidence of recent epistaxis
  • Hemorrhagic nasal discharge
  • Injury of head with rhinorrhagia
  • Maternal perinatal epistaxis
  • Posterior epistaxis
  • Post-surgical epistaxis
  • Recurrent bleeding of nose
  • Traumatic epistaxis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Hemorrhage from nose
  • Nosebleed

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.

    • Bleeding
      • nose
    • Epistaxis(multiple)
    • Hemorrhage, hemorrhagic(concealed)
      • nasal turbinate
    • Hemorrhage, hemorrhagic(concealed)
      • nose
    • Hemorrhage, hemorrhagic(concealed)
      • postnasal
    • Nosebleed

Clinical ClassificationClinical

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

CCSR SYM013
Respiratory signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Epistaxis

    bleeding from the nose.

Patient EducationClinical

Nose Injuries and Disorders

Your nose is important to your health. It filters the air you breathe, removing dust, germs, and irritants. It warms and moistens the air to keep your lungs and tubes that lead to them from drying out. Your nose also contains the nerve cells that help your sense of smell.

Read the full article at MedlinePlus

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

Convert R04.0 to ICD-9-CMHistory

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

ICD-9-CM
784.7 Epistaxis
Exact Match The mapping is direct, with no qualifiers.

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 R04.0Overview

Is R04.0 (Hemorrhage from respiratory passages) a billable code?

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

What MS-DRG does R04.0 group to?

When epistaxis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 150, 151, with relative weights from 0.7340 to 1.3315 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R04.0 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the epistaxis is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R04.0?

Under the General Equivalence Mappings, epistaxis converts to ICD-9-CM 784.7 (epistaxis). The mapping is a direct match.

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.