2026 ICD-10-CM Diagnosis Code J31.1Chronic nasopharyngitis
ICD-10-CM Codes›J00–J99›J30-J39›J31
- Billable — Valid for Submission
- Chronic Condition
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 11 through 13, 152 through 153. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified upper respiratory disease.
Code Identity
Code Classification
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
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Catarrh, catarrhal (acute) (febrile) (infectious) (inflammation) See Also: condition; J00
nasobronchial J31.1
nasopharyngeal (chronic) J31.1
Rhinopharyngitis (acute) (subacute) See Also: Nasopharyngitis;
chronic J31.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Code HistoryHistory
Questions About J31.1Overview
What is the ICD-10 code for chronic nasopharyngitis?
The ICD-10-CM code for chronic nasopharyngitis is J31.1 (sometimes written as J311). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
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 11, 12, 13, 152, 153, with relative weights from 0.7382 to 5.4541 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.
