2026 ICD-10-CM Diagnosis Code D41.00Neoplasm of uncertain behavior of unspecified kidney
ICD-10-CM Codes›C00–D49›D37-D48›D41
- Billable — Valid for Submission
- Not Chronic
D41.00 is a billable ICD-10-CM diagnosis code for neoplasm of uncertain behavior of unspecified kidney. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 656 through 658, 686 through 688. Coders also document this condition as hemangioblastoma of kidney. 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.
- Hemangioblastoma of kidney
- Mesoblastic nephroma
- Neoplasm of uncertain behavior of kidney
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
Patient EducationClinical
Kidney Cancer
You have two kidneys. They are fist-sized organs on either side of your backbone above your waist. The tubes inside filter and clean your blood, taking out waste products and making urine. Kidney cancer forms in the lining of tiny tubes inside your kidneys.
Read the full article at MedlinePlus
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Convert D41.00 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D41.00Overview
Is D41.00 (Neoplasm of uncertain behavior of kidney) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report neoplasm of uncertain behavior of unspecified kidney on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D41.00 group to?
When neoplasm of uncertain behavior of unspecified kidney is the principal diagnosis on an inpatient stay, it groups to MS-DRG 656, 657, 658, 686, 687, 688, with relative weights from 0.7903 to 3.1838 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D41.00?
Under the General Equivalence Mappings, neoplasm of uncertain behavior of unspecified kidney converts to ICD-9-CM 236.91 (unc behav neo kidney). 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.
