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ICD-10-CM 2027 diagnosis code

J34.831Odontogenic sinusitis, ethmoid sinus

✓ Billable / specificNew for 2027

J34.831 is a valid, billable ICD-10-CM code for odontogenic sinusitis, ethmoid sinus. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2027 (effective October 1, 2026). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About J34.831

J34.831 is the ICD-10-CM diagnosis code for odontogenic sinusitis, ethmoid sinus. 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 J34.83 (odontogenic sinusitis), J34.831 is specifically for odontogenic sinusitis, ethmoid sinus. Related codes cover maxillary sinus (J34.830), frontal sinus (J34.832), sphenoid sinus (J34.833) and unspecified (J34.839).

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 was added in FY2027, effective October 1, 2026.

Notes that apply from higher levels

Instructions written at a parent level also apply to J34.831.

› 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 J34.831.

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

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
  • FY2027 (effective 10/1/2026): Added

Common questions about J34.831

Is J34.831 billable?

Yes. J34.831 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can J34.831 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict J34.831 as a principal diagnosis.

Is J34.831 a CC or MCC?

No. J34.831 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does J34.831 group to?

J34.831 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.

Did J34.831 change for 2027?

Yes. For FY2027 (effective October 1, 2026) it was added to the code set.