2026 ICD-10-CM Diagnosis Code C32.2Malignant neoplasm of subglottis

ICD-10-CM Codes›C00–D49›C30-C39›C32

ICD-10-CM C32.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C32.2 is a billable ICD-10-CM diagnosis code for malignant neoplasm of subglottis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 146 through 148. Coders also document this condition as carcinoma of larynx. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Head and neck cancers - laryngeal.

Code Identity

ICD-10-CM Code
C32.2
Billable Status
Yes — Valid for Submission
Code Describes
Malignant neoplasm of subglottis
Short Description
Malignant neoplasm of subglottis
Same as the full description in the CMS dataset.
Parent Code
C32
Malignant neoplasm of larynx

Code Classification

ChapterC00–D49Neoplasms
SectionC30-C39Malignant neoplasms of respiratory and intrathoracic organs
CategoryC32Malignant neoplasm of larynx
This CodeC32.2Malignant neoplasm of subglottis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Carcinoma of larynx
  • Carcinoma of subglottis
  • Malignant neoplasm of subglottis
  • Primary adenocarcinoma of subglottis
  • Primary carcinoma of larynx
  • Primary carcinoma of subglottis
  • Primary malignant neoplasm of subglottis
  • Primary squamous cell carcinoma of subglottis

Clinical ClassificationClinical

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

CCSR NEO008
Head and neck cancers - laryngeal
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
subglottis, subglotticC32.2C78.39D02.0D14.1D38.0D49.1

Patient EducationClinical

Throat Cancer

Throat cancer is a type of head and neck cancer. Throat cancer has different names, depending on which part of the throat is affected. The different parts of your throat are called the oropharynx, the hypopharynx, the nasopharynx, and the larynx, or voice box.

Read the full article at MedlinePlus

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

Convert C32.2 to ICD-9-CMHistory

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

ICD-9-CM
161.2 Malig neo subglottis
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 C32.2Overview

Is C32.2 (Malignant neoplasm of larynx) a billable code?

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

What MS-DRG does C32.2 group to?

When malignant neoplasm of subglottis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 146, 147, 148, with relative weights from 0.7971 to 2.1174 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of C32.2?

Under the General Equivalence Mappings, malignant neoplasm of subglottis converts to ICD-9-CM 161.2 (malig neo subglottis). 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.