Other congenital malformations of digestive system (Q45) ICD-10-CM
The Q45 code range covers other congenital malformations of digestive system with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the Q45 Range 7 codes · 6 billable
- Q45 Other congenital malformations of digestive systemNon-billable
- Q45.0 Agenesis, aplasia and hypoplasia of pancreas
- Q45.1 Annular pancreas
- Q45.2 Congenital pancreatic cyst
- Q45.3 Other congenital malformations of pancreas and pancreatic duct
- Q45.8 Other specified congenital malformations of digestive system
- Q45.9 Congenital malformation of digestive system, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q45 range.
Mesenteric Cyst
A rare intra-abdominal tumor in the MESENTERY. Mesenteric cysts are usually benign and can be very large fluid-filled (2000 mL) lesions.
Pancreas Divisum
Anatomic variants in PANCREATIC DUCTS characterized by failure of fusion of the ventral and dorsal endodermal buds. Pancreas divisum results in inadequate or no communication between dorsal and ventral ducts. While most cases are asymptomatic, it may be associated with recurrent PANCREATITIS.
About the Q45 Code Range
The ICD-10 code section Q45 covers other congenital malformations of the digestive system, focusing on rare birth defects affecting digestive organs such as the pancreas and surrounding structures.
This group includes codes for specific conditions like Q45.0 (agenesis, aplasia, and hypoplasia of the pancreas), which refers to incomplete or absent pancreas development often called pancreatic agenesis or congenital hypoplasia of the pancreas. Q45.1 addresses annular pancreas, a congenital condition causing duodenal obstruction due to pancreatic tissue encircling the duodenum. Q45.2 identifies congenital pancreatic cysts, including polycystic disease of the pancreas. Other anomalies, such as pancreatic duct irregularities and accessory pancreatic tissue, fall under Q45.3. The code Q45.8 covers various specified digestive system malformations like mesenteric cysts and ectopic pancreatic tissue. Lastly, Q45.9 is used for unspecified congenital malformations of the digestive tract. These codes help healthcare professionals accurately classify and document unusual congenital digestive system conditions encountered in clinical practice.
Questions About This Page
How many billable codes are in the Q45 range?
Of the 7 codes in this range, 6 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the Q45 range classify?
The range classifies other congenital malformations of digestive system. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
