Q44.5
Other congenital malformations of bile ducts
Q44.5 (also written Q445) is a billable ICD-10-CM diagnosis code for other congenital malformations of bile ducts. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 10 codes in category Q44 (Congenital malformations of gallbladder, bile ducts and liver). The Alphabetic Index lists it under 34 entries. Its coding notes include 1 Excludes2 entry.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (1 note)
- inborn errors of metabolism (E70-E88)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Other clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Hospital CC
Counts as a complication or comorbidity (CC) when reported as a secondary diagnosis on an inpatient claim. It does not count when the principal diagnosis is one of the 10 codes in its exclusion list. Some MS-DRGs also ignore a CC or MCC that defines the DRG.
Source: CMS MS-DRG Definitions Manual v44, effective October 1, 2026, Appendix CInclusion terms
Conditions classified to this code.
- Accessory hepatic duct
- Biliary duct duplication
- Congenital malformation of bile duct NOS
- Cystic duct duplication
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 34 entries
- Aberrant (congenital), hepatic duct
- Absence (of) (organ or part) (complete or partial), bile, biliary duct, congenital
- Accessory (congenital), biliary duct or passage
- Accessory (congenital), cystic duct
- Accessory (congenital), hepatic ducts
- Accessory (congenital), liver, duct
- Agenesis, bile duct or passage
- Anomaly, anomalous (congenital) (unspecified type), biliary duct or passage
- Anomaly, anomalous (congenital) (unspecified type), common duct
- Anomaly, anomalous (congenital) (unspecified type), cystic duct
- Anomaly, anomalous (congenital) (unspecified type), hepatic duct
- Anomaly, anomalous (congenital) (unspecified type), liver, duct
Show 22 more
- Deformity, bile duct (common) (congenital) (hepatic)
- Deformity, biliary duct or passage (congenital)
- Deformity, cystic duct (congenital)
- Deformity, hepatic duct (congenital)
- Dilatation, common duct (acquired), congenital
- Dilatation, cystic duct (acquired), congenital
- Distortion (s) (congenital), bile duct or passage
- Distortion (s) (congenital), common duct
- Distortion (s) (congenital), cystic duct
- Distortion (s) (congenital), hepatic duct
- Duplication, duplex, biliary duct (any)
- Duplication, duplex, cystic duct
- Elongated, elongation (congenital), common bile duct
- Elongated, elongation (congenital), cystic duct
- Fistula (cutaneous), cystic duct, congenital
- Hypoplasia, hypoplastic, biliary duct or passage
- Malformation (congenital), bile duct
- Malposition, congenital, biliary duct or passage
- Malposition, congenital, hepatic duct
- Short, shortening, shortness, common bile duct, congenital
- Short, shortening, shortness, cystic duct, congenital
- Torsion, bile duct (common) (hepatic), congenital