2026 ICD-10-CM Diagnosis Code D37.031Neoplasm of uncertain behavior of the sublingual salivary glands
ICD-10-CM Codes›C00–D49›D37-D48›D37
- Billable — Valid for Submission
- Not Chronic
D37.031 is a billable ICD-10-CM diagnosis code for neoplasm of uncertain behavior of the sublingual salivary glands. 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 neoplasm of uncertain behavior of floor of mouth. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neoplasms of unspecified nature or uncertain behavior.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Neoplasm of uncertain behavior of floor of mouth
- Neoplasm of uncertain behavior of major salivary gland
- Neoplasm of uncertain behavior of sublingual gland
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Patient EducationClinical
Salivary Gland Disorders
Your salivary glands are in your mouth. You have three pairs of major salivary glands and hundreds of small (minor) glands. They make saliva (spit) and empty it into your mouth through openings called ducts. Saliva makes your food moist, which helps you chew and swallow. It helps you digest your food.
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Convert D37.031 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D37.031Overview
Is D37.031 (Neoplasm of uncertain behavior of the major salivary glands) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report neoplasm of uncertain behavior of the sublingual salivary glands on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D37.031 group to?
When neoplasm of uncertain behavior of the sublingual salivary glands 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 D37.031?
Under the General Equivalence Mappings, neoplasm of uncertain behavior of the sublingual salivary glands converts to ICD-9-CM 235.0 (unc behav neo salivary). The mapping is approximate, so confirm the match fits the documentation.
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.
