2026 ICD-10-CM Diagnosis Code J01.40Acute pansinusitis, unspecified

ICD-10-CM Codes›J00–J99›J00-J06›J01

ICD-10-CM J01.40
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J01.40 is a billable ICD-10-CM diagnosis code for acute pansinusitis, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 152 through 153. Coders also document this condition as acute pansinusitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sinusitis.

Code Identity

ICD-10-CM Code
J01.40
Billable Status
Yes — Valid for Submission
Code Describes
Acute pansinusitis, unspecified
Short Description
Acute pansinusitis, unspecified
Same as the full description in the CMS dataset.
Parent Code
J01.4
Acute pansinusitis

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ00-J06Acute upper respiratory infections
CategoryJ01Acute sinusitis
This CodeJ01.40Acute pansinusitis, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute pansinusitis

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.

    • Pansinusitis(chronic) (hyperplastic) (nonpurulent) (purulent)
      • acute
    • Sinusitis(accessory) (chronic) (hyperplastic) (nasal) (nonpurulent) (purulent)
      • acute
        • pansinusitis

Clinical ClassificationClinical

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

CCSR RSP001
Sinusitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Sinusitis

Sinusitis means your sinuses are inflamed. The cause can be an infection or another problem. Your sinuses are hollow air spaces within the bones surrounding the nose. They produce mucus, which drains into the nose. If your nose is swollen, this can block the sinuses and cause pain.

Read the full article at MedlinePlus

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

Convert J01.40 to ICD-9-CMHistory

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

ICD-9-CM
461.8 Other acute sinusitis
Approximate The match is approximate rather than exact.

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 J01.40Overview

Is J01.40 (Acute pansinusitis) a billable code?

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

What MS-DRG does J01.40 group to?

When acute pansinusitis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 152, 153, with relative weights from 0.7382 to 1.1822 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of J01.40?

Under the General Equivalence Mappings, acute pansinusitis, unspecified converts to ICD-9-CM 461.8 (other acute sinusitis). The mapping is approximate, so confirm the match fits the documentation.

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.