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ICD-10-CM 2027 diagnosis code

R04.0Epistaxis

✓ Billable / specific

R04.0 is a valid, billable ICD-10-CM code for epistaxis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Epistaxis, ICD-10 code for Nosebleed.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R04.0

R04.0 is the ICD-10-CM diagnosis code for epistaxis. It belongs to category R04 (hemorrhage from respiratory passages), block R00-R09 (symptoms and signs involving the circulatory and respiratory systems) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R04 (hemorrhage from respiratory passages), R04.0 is specifically for epistaxis. Related codes cover hemorrhage from throat (R04.1), hemoptysis (R04.2), hemorrhage from other sites in respiratory passages (R04.8) and unspecified (R04.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 150 (Epistaxis with MCC, relative weight 1.4473) and DRG 151 (Epistaxis without MCC, relative weight 0.7615), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 784.7 (epistaxis).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Hemorrhage from nose
  • Nosebleed

Notes that apply from higher levels

Instructions written at a parent level also apply to R04.0.

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to R04.0.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 03 · Diseases and Disorders of the Ear, Nose, Mouth and Throat

ICD-9-CM equivalent

Converter →

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about R04.0

Is R04.0 billable?

Yes. R04.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R04.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R04.0 as a principal diagnosis.

Is R04.0 a CC or MCC?

No. R04.0 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R04.0 group to?

R04.0 is used in the MS-DRG v44.0 logic for MS-DRG 150 (Epistaxis with MCC) and MS-DRG 151 (Epistaxis without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for R04.0?

The CMS General Equivalence Mappings map R04.0 to ICD-9-CM 784.7.