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ICD-10-CM 2027 diagnosis code

J01.10Acute frontal sinusitis, unspecified

✓ Billable / specific

J01.10 is a valid, billable ICD-10-CM code for acute frontal sinusitis, unspecified. 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 J01.10

J01.10 is the ICD-10-CM diagnosis code for acute frontal sinusitis, unspecified. It belongs to category J01 (acute sinusitis), block J00-J06 (acute upper respiratory infections) 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 J01.1, choose J01.10 (unspecified) only when documentation doesn't support a more specific option: recurrent frontal sinusitis (J01.11).

Use an additional code (B95-B97) to identify infectious agent.

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 152 (Otitis Media and URI with MCC, relative weight 1.1151) and DRG 153 (Otitis Media and URI without MCC, relative weight 0.7421), 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 461.1 (acute frontal sinusitis).

Notes that apply from higher levels

Instructions written at a parent level also apply to J01.10.

› From J01 Acute sinusitis
Includes
  • acute abscess of sinus
  • acute empyema of sinus
  • acute infection of sinus
  • acute inflammation of sinus
  • acute suppuration of sinus
Excludes1
Excludes2
Use additional code
  • code (B95-B97) to identify infectious agent.

Broader instructions also apply from J00-J06 Acute upper respiratory infections and Chapter 10: Diseases of the respiratory system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to J01.10.

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 →
  • 461.1Acute frontal sinusitisapproximate

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 J01.10

Is J01.10 billable?

Yes. J01.10 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can J01.10 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict J01.10 as a principal diagnosis.

Is J01.10 a CC or MCC?

No. J01.10 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does J01.10 group to?

J01.10 is used in the MS-DRG v44.0 logic for MS-DRG 152 (Otitis Media and URI with MCC) and MS-DRG 153 (Otitis Media and URI 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 J01.10?

The CMS General Equivalence Mappings map J01.10 to ICD-9-CM 461.1.