2027 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 2027 (October 1, 2026 through September 30, 2027) 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D13.5: its own notes plus those printed at D13 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Notes
General instructions on how these codes are used.
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
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
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.
| 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.
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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
What is the ICD-10 code for benign neoplasm of extrahepatic bile ducts?
The ICD-10-CM code for benign neoplasm of extrahepatic bile ducts is D13.5 (sometimes written as D135). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 442, 441, 443, with relative weights from 0.6890 to 1.8226 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D13.5 be reported with D21.4?
Not as a rule. The Excludes1 note at D13, which applies to D13.5, lists "benign stromal tumors of digestive system (D21.4)". 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 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.
