2026 ICD-10-CM Diagnosis Code J31.1Chronic nasopharyngitis

ICD-10-CM Codes›J00–J99›J30-J39›J31

ICD-10-CM J31.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J31.1 is a billable ICD-10-CM diagnosis code for chronic nasopharyngitis. 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 Other specified and unspecified upper respiratory disease.

Code Identity

ICD-10-CM Code
J31.1
Billable Status
Yes — Valid for Submission
Code Describes
Chronic nasopharyngitis
Short Description
Chronic nasopharyngitis
Same as the full description in the CMS dataset.
Parent Code
J31
Chronic rhinitis, nasopharyngitis and pharyngitis

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ30-J39Other diseases of upper respiratory tract
CategoryJ31Chronic rhinitis, nasopharyngitis and pharyngitis
This CodeJ31.1Chronic nasopharyngitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic nasopharyngitis

Tabular List NotesGuidance

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

Type 2 Excludes

  • acute nasopharyngitis J00

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.

    • Atrophy, atrophic(of)
      • nasopharynx
    • Catarrh, catarrhal(acute) (febrile) (infectious) (inflammation)
      • nasobronchial
    • Catarrh, catarrhal(acute) (febrile) (infectious) (inflammation)
      • nasopharyngeal (chronic)
    • Nasopharyngitis(acute) (infective) (streptococcal) (subacute)
      • chronic (suppurative) (ulcerative)
    • Rhinopharyngitis(acute) (subacute)
      • chronic

Clinical ClassificationClinical

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

CCSR RSP007
Other specified and unspecified upper respiratory disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Nose Injuries and Disorders

Your nose is important to your health. It filters the air you breathe, removing dust, germs, and irritants. It warms and moistens the air to keep your lungs and tubes that lead to them from drying out. Your nose also contains the nerve cells that help your sense of smell.

Read the full article at MedlinePlus

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

Convert J31.1 to ICD-9-CMHistory

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

ICD-9-CM
472.2 Chronic nasopharyngitis
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 J31.1Overview

Is J31.1 (Chronic rhinitis, nasopharyngitis and pharyngitis) a billable code?

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

What MS-DRG does J31.1 group to?

When chronic nasopharyngitis 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 J31.1?

Under the General Equivalence Mappings, chronic nasopharyngitis converts to ICD-9-CM 472.2 (chronic nasopharyngitis). 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.