ICD-10-CM 2027
ICD-10 code for common duct cyst
From the official ICD-10-CM alphabetic index entry “Cyst (colloid) (mucous) (simple) (retention) › common (bile) duct”. Page updated September 29, 2026.
About coding common duct cyst
The ICD-10-CM code for common duct cyst is K83.5 (Biliary cyst).
Within K83 (other diseases of biliary tract), K83.5 is specifically for biliary cyst. Related codes cover cholangitis (K83.0), obstruction of bile duct (K83.1), perforation of bile duct (K83.2), fistula of bile duct (K83.3), spasm of sphincter of Oddi (K83.4), other specified diseases of biliary tract (K83.8) and disease of biliary tract, unspecified (K83.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 444 (Disorders of the Biliary Tract with MCC, relative weight 1.6665), DRG 445 (Disorders of the Biliary Tract with CC, relative weight 1.0872) and DRG 446 (Disorders of the Biliary Tract without CC/MCC, relative weight 0.8124), in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about common duct cyst ICD-10 codes
What is the ICD-10 code for common duct cyst?
- K83.5 — Biliary cyst.
Is K83.5 billable?
- Yes. K83.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K83.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K83.5 as a principal diagnosis.
Is K83.5 a CC or MCC?
- No. K83.5 is neither a CC nor an MCC under MS-DRG v44.0.