2027 ICD-10-CM Diagnosis Code K83.1Obstruction of bile duct

ICD-10-CM Codes›K00–K95›K80-K87›K83

ICD-10-CM K83.1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

K83.1 is a billable ICD-10-CM diagnosis code for obstruction of bile duct. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 444 through 446. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 16 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Biliary tract disease.

For Medicare Advantage risk adjustment, K83.1 maps to CMS-HCC Category 68 (Cholangitis and Obstruction of Bile Duct Without Gallstones) under the V28 model, adding a risk factor of about 0.388 for a community, non-dual, aged beneficiary in payment year 2027.

Code Identity

ICD-10-CM Code
K83.1
Billable Status
Yes — Valid for Submission
Code Describes
Obstruction of bile duct
Short Description
Obstruction of bile duct
Same as the full description in the CMS dataset.
Parent Code
K83
Other diseases of biliary tract

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK80-K87Disorders of gallbladder, biliary tract and pancreas
CategoryK83Other diseases of biliary tract
This CodeK83.1Obstruction of bile duct

Medicare Risk Adjustment (HCC)Billing

K83.1 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.

CMS-HCC V28 Category (Payment Model)
HCC 68— Cholangitis and Obstruction of Bile Duct Without Gallstones
Payment HCC · PY 2027 one of 8 ICD-10-CM codes in this category
Risk Adjustment Factor (RAF) Weight
+0.388
community, non-dual, aged · ranges 0.085–0.391 across segments
Hierarchy
Superseded by HCC 62, HCC 63, and HCC 64
a more severe related category takes the payment when both are reported
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
Not mapped
K83.1 does not risk-adjust in the RxHCC prescription drug model

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ampulla of Vater obstruction syndrome
  • Anastomotic biliary stricture
  • Anastomotic stricture of small intestine
  • Benign intrahepatic cholestasis type 2
  • Benign recurrent intrahepatic cholestasis
  • Biliary stricture
  • Cholestasis
  • Cholestasis in newborn
  • Cholestasis of pregnancy
  • Cholestasis of pregnancy complicating childbirth
  • Cholestasis with pigmentary retinopathy and cleft palate syndrome
  • Cholestasis-edema syndrome, Norwegian type
  • Conjugated hyperbilirubinemia
  • Courvoisier-Terrier syndrome
  • Deficiency of coagulation factor due to vitamin K deficiency
  • Deficiency of coagulation factor due to vitamin K malabsorption in obstructive biliary disease
  • Disorder of anastomosis of biliary tract
  • Disorder of liver due to disorder of amino acid metabolism
  • Drug-induced intrahepatic cholestasis
  • Extrahepatic cholestasis
  • Extrahepatic obstructive biliary disease
  • GRACILE syndrome
  • Liver disorder in pregnancy
  • Mirizzi's syndrome
  • Neonatal intrahepatic cholestasis due to citrin deficiency
  • Obstruction of bile duct
  • Obstruction of bile duct due to malignant neoplasm of head of pancreas
  • Obstruction of biliary tree
  • Obstruction of common bile duct
  • Obstructive hyperbilirubinemia
  • Occlusion of bile duct
  • Postoperative biliary stricture
  • Postoperative stricture
  • Postpartum cholestasis
  • Progressive familial intrahepatic cholestasis type 1
  • Progressive familial intrahepatic cholestasis type 2
  • Progressive familial intrahepatic cholestasis type 3
  • Progressive familial intrahepatic cholestasis type 4
  • Progressive intrahepatic cholestasis
  • Retinal pigment deposits
  • Stasis of bile duct
  • Stenosis of bile duct
  • Stenosis of jejunum
  • Stricture of anastomosis of gastrointestinal tract
  • Stricture of anastomosis of intestine
  • Stricture of bile duct
  • Stricture of biliary-enteric anastomosis
  • Stricture of hepatic duct
  • Stricture of hepaticojejunal anastomosis
  • Stricture of jejunum
  • Stricture of small intestine
  • Vanishing bile duct syndrome
  • Vitamin K deficiency coagulation disorder due to malabsorption

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K83.1: its own notes plus those printed at K83 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Occlusion of bile duct without cholelithiasis
  • Stenosis of bile duct without cholelithiasis
  • Stricture of bile duct without cholelithiasis

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On K83.1 itself
  • congenital obstruction of bile duct (Q44.3)
  • obstruction of bile duct with cholelithiasis (K80.-)
From K83 Other diseases of biliary tract applies to 9 codes
  • postcholecystectomy syndrome (K91.5)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From K83 Other diseases of biliary tract applies to 9 codes
  • conditions involving the gallbladder (K81-K82)
  • conditions involving the cystic duct (K81-K82)
From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

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.

Clinical ClassificationClinical

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

CCSR DIG017
Biliary tract disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Mirizzi Syndrome

    complication of cholelithiasis characterized by obstructive jaundice; abdominal pain, and fever.

Patient EducationClinical

Bile Duct Diseases

Your liver makes a digestive juice called bile. Your gallbladder stores it between meals. When you eat, your gallbladder pushes the bile into tubes called bile ducts. They carry the bile to your small intestine. The bile helps break down fat. It also helps the liver get rid of toxins and wastes.

Read the full article at MedlinePlus

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

Convert K83.1 to ICD-9-CMHistory

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

ICD-9-CM
576.2 Obstruction of bile duct
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K83.1Overview

What is the ICD-10 code for obstruction of bile duct?

The ICD-10-CM code for obstruction of bile duct is K83.1 (sometimes written as K831). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is K83.1 (Other diseases of biliary tract) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report obstruction of bile duct on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does K83.1 group to?

When obstruction of bile duct is the principal diagnosis on an inpatient stay, it groups to MS-DRG 444, 445, 446, with relative weights from 0.8121 to 1.6662 depending on complications. Higher weights mean higher Medicare reimbursement.

Is K83.1 a CC or MCC?

CMS lists K83.1 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 16 closely related codes in its exclusion list.

Can K83.1 be reported with Q44.3?

Not as a rule. The Excludes1 note on K83.1 lists "congenital obstruction of bile duct (Q44.3)". 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 HCC is K83.1?

K83.1 (obstruction of bile duct) maps to CMS-HCC Category 68 (Cholangitis and Obstruction of Bile Duct Without Gallstones), commonly written as HCC 68, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It does not map to any RxHCC in the Part D prescription drug model.

Does K83.1 risk-adjust for Medicare Advantage payment?

Yes. When documented and reported on a Medicare Advantage encounter, K83.1 adds a risk adjustment factor of about 0.388 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.085 to 0.391 depending on the payment segment). A more severe related category (HCC 62, HCC 63, and HCC 64) supersedes it when both are reported. See the full factor table on the HCC 68 category page.