2026 ICD-10-CM Diagnosis Code J32.0Chronic maxillary sinusitis

ICD-10-CM Codes›J00–J99›J30-J39›J32

ICD-10-CM J32.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J32.0 is a billable ICD-10-CM diagnosis code for chronic maxillary sinusitis. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sinusitis.

Code Identity

ICD-10-CM Code
J32.0
Billable Status
Yes — Valid for Submission
Code Describes
Chronic maxillary sinusitis
Short Description
Chronic maxillary sinusitis
Same as the full description in the CMS dataset.
Parent Code
J32
Chronic sinusitis

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ30-J39Other diseases of upper respiratory tract
CategoryJ32Chronic sinusitis
This CodeJ32.0Chronic maxillary sinusitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic bilateral maxillary sinusitis
  • Chronic left maxillary sinusitis
  • Chronic maxillary sinusitis
  • Chronic right maxillary sinusitis
  • Fistula of nasal sinus
  • Iatrogenic odontogenic maxillary sinusitis following dental procedure
  • Maxillary sinusitis
  • Maxillary sinusitis due to dental disorder
  • Maxillary sinusitis due to endodontic disease
  • Maxillary sinusitis due to periodontal disease
  • Odontogenic maxillary sinusitis due to oroantral fistula
  • Oral fistula
  • Oroantral communication
  • Oroantral fistula
  • Periapical maxillary mucositis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Antritis (chronic)
  • Maxillary sinusitis NOS

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.

    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • maxilla, maxillary
        • sinus (chronic)
    • Antritis
    • Antritis
      • maxilla
    • Cloudy antrum, antra
    • Degeneration, degenerative
      • nasal sinus (mucosa)
        • maxillary
    • Fistula(cutaneous)
      • maxillary
    • Fistula(cutaneous)
      • oral (cutaneous)
        • maxillary
    • Fistula(cutaneous)
      • oroantral
    • Lesion(s) (nontraumatic)
      • maxillary sinus
    • Necrosis, necrotic(ischemic)
      • antrum
    • Sinusitis(accessory) (chronic) (hyperplastic) (nasal) (nonpurulent) (purulent)
      • maxillary

Clinical ClassificationClinical

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

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

Clinical InformationClinical

  • Oroantral Fistula

    a fistula between the maxillary sinus and the oral cavity.

  • Oral Fistula

    an abnormal passage within the mouth communicating between two or more anatomical structures.

  • Maxillary Sinusitis

    inflammation of the nasal mucosa in the maxillary sinus. in many cases, it is caused by an infection of the bacteria haemophilus influenzae; streptococcus pneumoniae; or staphylococcus aureus.

  • Chronic Maxillary Sinusitis

    inflammation of the maxillary sinus that typically lasts beyond eight weeks. it is caused by infections, allergies, and the presence of sinus polyps or a deviated septum. signs and symptoms include headache, nasal discharge, swelling in the face, dizziness, and breathing difficulties.

  • Maxillary Sinusitis

    an acute or chronic inflammatory process affecting the mucous membrane of the maxillary sinus.

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 J32.0 to ICD-9-CMHistory

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

ICD-9-CM
473.0 Chr maxillary sinusitis
Exact Match The mapping is direct, with no qualifiers.

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 J32.0Overview

Is J32.0 (Chronic sinusitis) a billable code?

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

What MS-DRG does J32.0 group to?

When chronic maxillary sinusitis 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 J32.0?

Under the General Equivalence Mappings, chronic maxillary sinusitis converts to ICD-9-CM 473.0 (chr maxillary sinusitis). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.