2026 ICD-10-CM Diagnosis Code J33.0Polyp of nasal cavity
ICD-10-CM Codes›J00–J99›J30-J39›J33
- Billable — Valid for Submission
- Not Chronic
J33.0 is a billable ICD-10-CM diagnosis code for polyp of nasal cavity. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 154 through 156. 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.
- Choanal polyp
- Lesion of nasal mucosa
- Polyp in nasopharynx
- Polyp of bilateral nasal cavities
- Polyp of left nasal cavity
- Polyp of mucous membrane of choana
- Polyp of nasal cavity
- Polyp of nasal cavity and/or nasal sinus
- Polyp of right nasal cavity
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Choanal polyp
- Nasopharyngeal polyp
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- adenoid tissue - J33.0
- choanal - J33.0
- nares
- posterior - J33.0
- nasal (mucous) - J33.9
- nasopharyngeal - J33.0
- septum (nasal) - J33.0
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Polyp, polypus
- adenoid tissue
- Polyp, polypus
- choanal
- Polyp, polypus
- nares
- posterior
- Polyp, polypus
- nasal (mucous)
- cavity
- Polyp, polypus
- nasal (mucous)
- septum
- Polyp, polypus
- nasopharyngeal
- Polyp, polypus
- septum (nasal)
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 J33.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J33.0Overview
Is J33.0 (Nasal polyp) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report polyp of nasal cavity on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does J33.0 group to?
When polyp of nasal cavity is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of J33.0?
Under the General Equivalence Mappings, polyp of nasal cavity converts to ICD-9-CM 471.0 (polyp of nasal cavity). The mapping is a direct match.
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.
