2027 ICD-10-CM Diagnosis Code J33.1Polypoid sinus degeneration

ICD-10-CM Codes›J00–J99›J30-J39›J33

ICD-10-CM J33.1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

J33.1 is a billable ICD-10-CM diagnosis code for polypoid sinus degeneration. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 154 through 156. Coders also document this condition as nasal polyposis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified upper respiratory disease.

Code Identity

ICD-10-CM Code
J33.1
Billable Status
Yes — Valid for Submission
Code Describes
Polypoid sinus degeneration
Short Description
Polypoid sinus degeneration
Same as the full description in the CMS dataset.
Parent Code
J33
Nasal polyp

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ30-J39Other diseases of upper respiratory tract
CategoryJ33Nasal polyp
This CodeJ33.1Polypoid sinus degeneration

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Nasal polyposis
  • Polypoid sinus degeneration
  • Sinusitis co-occurrent with nasal polyps

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to J33.1: its own notes plus those printed at J33 and Chapter 10. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Woakes' syndrome or ethmoiditis

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From J33 Nasal polyp applies to 4 codes
  • adenomatous polyps (D14.0)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • smoke inhalation (T59.81-)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • code, where applicable, to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Notes

General instructions on how these codes are used.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name J33.1, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming J33.1: they are not reported together with it, unless the two conditions are unrelated.

  • J32.2 Chronic ethmoidal sinusitis
    Woakes' ethmoiditis (J33.1)
  • D14.0 Benign neoplasm of middle ear, nasal cavity and accessory sinuses
    polyp of nasal (cavity) (J33.-) names J33.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

Clinical InformationClinical

  • Polypoid Sinus Degeneration

    recurrent nasal polyps with subsequent destruction of the nasal pyramid.

  • Nasal Polyps

    focal accumulations of edema fluid in the nasal mucosa accompanied by hyperplasia of the associated submucosal connective tissue. polyps may be neoplasms, foci of inflammation, degenerative lesions, or malformations.

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 J33.1 to ICD-9-CMHistory

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

ICD-9-CM
471.1 Polypoid sinus degen
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About J33.1Overview

What is the ICD-10 code for polypoid sinus degeneration?

The ICD-10-CM code for polypoid sinus degeneration is J33.1 (sometimes written as J331). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is J33.1 (Nasal polyp) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report polypoid sinus degeneration on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does J33.1 group to?

When polypoid sinus degeneration is the principal diagnosis on an inpatient stay, it groups to MS-DRG 156, 155, 154, with relative weights from 0.6656 to 1.5916 depending on complications. Higher weights mean higher Medicare reimbursement.

Can J33.1 be reported with D14.0?

Not as a rule. The Excludes1 note at J33, which applies to J33.1, lists "adenomatous polyps (D14.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of J33.1?

Under the General Equivalence Mappings, polypoid sinus degeneration converts to ICD-9-CM 471.1 (polypoid sinus degen). The mapping is a direct match.