2026 ICD-10-CM Diagnosis Code D13.5Benign neoplasm of extrahepatic bile ducts
ICD-10-CM Codes›C00–D49›D10-D36›D13
- Billable — Valid for Submission
- Not Chronic
D13.5 is a billable ICD-10-CM diagnosis code for benign neoplasm of extrahepatic bile ducts. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 441 through 443. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Adenoma of ampulla of Vater
- Adenoma of duodenum
- Adenoma of gallbladder
- Adenoma of pancreas
- Adenoma of small intestine
- Adenomyoma of gallbladder
- Benign epithelial neoplasm of duodenum
- Benign mesenchymoma of biliary tract
- Benign neoplasm of ampulla of Vater
- Benign neoplasm of bile duct
- Benign neoplasm of biliary tract
- Benign neoplasm of common bile duct
- Benign neoplasm of cystic duct
- Benign neoplasm of extrahepatic bile ducts
- Benign neoplasm of gallbladder
- Benign neoplasm of hepatic duct
- Benign neoplasm of liver and/or biliary ducts
- Benign neoplasm of pancreatic duct
- Benign neoplasm of sphincter of Oddi
- Benign polyp of biliary tract
- Biliary papillomatosis
- Cholangioadenoma
- Cholangioadenoma of extrahepatic bile duct
- Intestinal-type adenoma of ampulla of Vater
- Intracystic papillary neoplasm with low grade intraepithelial neoplasia of gallbladder
- Intraductal papillary-mucinous adenoma of extrahepatic bile duct
- Mucinous cystic neoplasm with low grade intraepithelial neoplasia of extrahepatic bile duct
- Mucinous cystic neoplasm with low-grade intraepithelial neoplasia of gallbladder
- Neoplasm of cystic duct
- Papilloma of ampulla of Vater
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Adenoma - See Also: Neoplasm, benign, by site;
- common - D13.5
- extrahepatic - D13.5
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Adenoma
- bile duct
- common
- Adenoma
- bile duct
- extrahepatic
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Ampulla of Vater
a dilation of the duodenal papilla that is the opening of the juncture of the common bile duct and the main pancreatic duct, also known as the hepatopancreatic ampulla.Acalculous Cholecystitis
inflammation of the gallbladder wall in the absence of gallstones.Biliary Dyskinesia
a motility disorder characterized by biliary colic, absence of gallstones, and an abnormal gallbladder ejection fraction. it is caused by gallbladder dyskinesia and/or sphincter of oddi dysfunction.Cholecystitis
inflammation of the gallbladder; generally caused by impairment of bile flow, gallstones in the biliary tract, infections, or other diseases.Gallbladder
a storage reservoir for bile secretion. gallbladder allows the delivery of bile acids at a high concentration and in a controlled manner, via the cystic duct to the duodenum, for degradation of dietary lipid.Gallbladder Diseases
diseases of the gallbladder. they generally involve the impairment of bile flow, gallstones in the biliary tract, infections, neoplasms, or other diseases.Gallbladder Emptying
a process whereby bile is delivered from the gallbladder into the duodenum. the emptying is caused by both contraction of the gallbladder and relaxation of the sphincter mechanism at the choledochal terminus.Gallbladder Neoplasms
tumors or cancer of the gallbladder.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| ampulla of Vater | C24.1 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| bile or biliary (tract) | C24.9 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| bile or biliary (tract) › duct or passage (common) (cystic) (extrahepatic) | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| bile or biliary (tract) › duct or passage (common) (cystic) (extrahepatic) › intrahepatic › and extrahepatic | C24.8 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| choledochal duct | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| common (bile) duct | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| cystic (bile) duct (common) | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| extrahepatic (bile) duct | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| gall duct (extrahepatic) | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| gallbladder | C23 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| hepatic [See Also: Index to disease, by histology] › duct (bile) | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| hepatobiliary | C24.9 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| sphincter › of Oddi | C24.0 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
| Vater's ampulla | C24.1 | C78.89 | D01.5 | D13.5 | D37.6 | D49.0 |
Patient EducationClinical
Benign Tumors
Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.
Read the full article at MedlinePlus
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Convert D13.5 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D13.5Overview
Is D13.5 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report benign neoplasm of extrahepatic bile ducts on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D13.5 group to?
When benign neoplasm of extrahepatic bile ducts is the principal diagnosis on an inpatient stay, it groups to MS-DRG 441, 442, 443, with relative weights from 0.6997 to 1.7947 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D13.5?
Under the General Equivalence Mappings, benign neoplasm of extrahepatic bile ducts converts to ICD-9-CM 211.5 (ben neo liver/bile ducts). 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.
