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ICD-10-CM 2027 diagnosis code

J34.81Nasal mucositis (ulcerative)

✓ Billable / specific

J34.81 is a valid, billable ICD-10-CM code for nasal mucositis (ulcerative). It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 J34.81

J34.81 is the ICD-10-CM diagnosis code for nasal mucositis (ulcerative). It belongs to category J34 (other and unspecified disorders of nose and nasal sinuses), block J30-J39 (other diseases of upper respiratory tract) and chapter 10 (diseases of the respiratory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within J34.8 (other specified disorders of nose and nasal sinuses), J34.81 is specifically for nasal mucositis (ulcerative). Related codes cover nasal valve collapse (J34.82), odontogenic sinusitis (J34.83) and other specified disorders of nose and nasal sinuses (J34.89).

The conditions in its Excludes2 note aren't part of J34.81, but may be coded alongside it if the patient has both: gastrointestinal mucositis (ulcerative) (K92.81), mucositis (ulcerative) of vagina and vulva (N76.81) and oral mucositis (ulcerative) (K12.3-).

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 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322), DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659) and DRG 795 (Normal Newborn, relative weight 0.2022), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), 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 478.11 (nasal mucositis (ulcerative)).

Coding notes

Excludes2Not included here — may be reported together if both conditions exist
  • gastrointestinal mucositis (ulcerative) (K92.81)
  • mucositis (ulcerative) of vagina and vulva (N76.81)
  • oral mucositis (ulcerative) (K12.3-)
Code alsoTwo codes may be needed; sequencing depends on circumstances
  • type of associated therapy, such as:
  • antineoplastic and immunosuppressive drugs (T45.1X-)
  • radiological procedure and radiotherapy (Y84.2)

Notes that apply from higher levels

Instructions written at a parent level also apply to J34.81.

› From J34 Other and unspecified disorders of nose and nasal sinuses
Excludes2
  • varicose ulcer of nasal septum (I86.8)

Broader instructions also apply from Chapter 10: Diseases of the respiratory system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to J34.81.

Codes whose notes reference J34.81

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 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 478.11Nasal mucositis (ulcerative)exact

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 J34.81

Is J34.81 billable?

Yes. J34.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can J34.81 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict J34.81 as a principal diagnosis.

Is J34.81 a CC or MCC?

No. J34.81 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does J34.81 group to?

J34.81 is used in the MS-DRG v44.0 logic for MS-DRG 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC), MS-DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC), MS-DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC) and MS-DRG 795 (Normal Newborn). 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 J34.81?

The CMS General Equivalence Mappings map J34.81 to ICD-9-CM 478.11.