ICD-10-CM Code For Other Congenital Malformations Of Digestive System: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group Q45 includes congenital malformations of the digestive system that are not classified in other specific congenital digestive categories, covering structural anomalies of the alimentary tract and related digestive organs. These ICD-10-CM diagnosis codes are used to document cases of congenital structural abnormalities, capturing the anatomical site, extent of involvement, and associated clinical complexity relevant to this group. Accurate coding within the ICD-10-CM Q45 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM Q45: Other Congenital Malformations Of Digestive System Overview

This code group represents a set of congenital anomalies affecting the digestive tract that are not classified elsewhere. It targets structural malformations present at birth involving organs such as the esophagus, stomach, intestines, and associated digestive structures. Accurate coding ensures the medical record reflects the specific anomaly, which is important for clinical continuity and appropriate reimbursement.

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ICD-10-CM Code For Other Congenital Malformations Of Digestive System: Group Overview

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ICD-10-CM Q45: Other Congenital Malformations Of Digestive System Overview

When to Use

Assign a code from this group when a patient is diagnosed with a congenital malformation of the digestive system that is not classified elsewhere and the specific anatomical site is documented. Use these codes to capture the congenital nature and anatomical detail needed for clinical records and billing.

ICD-10-CM Codes

6 rows

ICD-10-CM Code	Description
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

DRG Codes

6 rows

DRG Code	Description
393	Other Digestive System Diagnoses with MCC
394	Other Digestive System Diagnoses with CC
395	Other Digestive System Diagnoses without CC/MCC
438	Disorders of Pancreas Except Malignancy with MCC
439	Disorders of Pancreas Except Malignancy with CC
440	Disorders of Pancreas Except Malignancy without CC/MCC

Typical Clinical Scenarios

A newborn in the nursery with bilious vomiting and abdominal distention shortly after initiation of feeds; radiographs suggest intestinal obstruction and contrast study shows jejunal atresia. The infant is stabilized and referred to pediatric surgery for operative repair; a congenital small intestinal atresia diagnosis from this group is assigned to document the structural cause of the obstruction. Typical codes: Q45.2
A school-aged child with chronic abdominal pain, failure to thrive, and intermittent non-bilious vomiting since infancy, now evaluated with endoscopy that demonstrates congenital pyloric stenosis with compensatory vomiting and poor weight gain. The child is referred for pyloromyotomy and ongoing nutritional follow-up; a congenital pyloric obstruction diagnosis from this group is used to capture the underlying developmental abnormality. Typical codes: Q45.0
An adult with a history of repaired congenital biliary atresia in childhood presents for routine surveillance and has chronic cholestasis and recurrent cholangitis as complications of the congenital biliary anomaly. The encounter documents the congenital malformation as the underlying cause of the current hepatobiliary complications and to guide care coordination and long-term management. Typical codes: Q45.1, Q45.8

ICD-10-CM Code For Other Congenital Malformations Of Tongue Mouth And Pharynx: Group Overview

Q39-CONGENITAL-MALFORMATIONS-OF-ESOPHAGUS

ICD-10-CM Code For Congenital Malformations Of Esophagus: Group Overview

Q40-OTHER-CONGENITAL-MALFORMATIONS-UPPER-ALIMENTARY-TRACT

ICD-10-CM Code For Other Congenital Malformations Of Upper Alimentary Tract: Group Overview

Q41-CONGENITAL-ABSENCE-ATRESIA-STENOSIS-SMALL-INTESTINE

ICD-10-CM Code For Congenital Absence, Atresia And Stenosis Of Small Intestine: Group Overview

Q42-CONGENITAL-LARGE-INTESTINE-MALFORMATIONS

ICD-10-CM Code For Congenital Absence, Atresia And Stenosis Of Large Intestine: Group Overview

Q43-OTHER-CONGENITAL-MALFORMATIONS-OF-INTESTINE

ICD-10-CM Code For Other Congenital Malformations Of Intestine: Group Overview

Q44-CONGENITAL-MALFORMATIONS-OF-GALLBLADDER

ICD-10-CM Code For Congenital Malformations Of Gallbladder, Bile Ducts And Liver: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

6 rows

ICD-10-CM Code	Description
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

DRG Codes

6 rows

DRG Code	Description
393	Other Digestive System Diagnoses with MCC
394	Other Digestive System Diagnoses with CC
395	Other Digestive System Diagnoses without CC/MCC
438	Disorders of Pancreas Except Malignancy with MCC
439	Disorders of Pancreas Except Malignancy with CC
440	Disorders of Pancreas Except Malignancy without CC/MCC

Typical Clinical Scenarios

A newborn in the nursery with bilious vomiting and abdominal distention shortly after initiation of feeds; radiographs suggest intestinal obstruction and contrast study shows jejunal atresia. The infant is stabilized and referred to pediatric surgery for operative repair; a congenital small intestinal atresia diagnosis from this group is assigned to document the structural cause of the obstruction. Typical codes: Q45.2
A school-aged child with chronic abdominal pain, failure to thrive, and intermittent non-bilious vomiting since infancy, now evaluated with endoscopy that demonstrates congenital pyloric stenosis with compensatory vomiting and poor weight gain. The child is referred for pyloromyotomy and ongoing nutritional follow-up; a congenital pyloric obstruction diagnosis from this group is used to capture the underlying developmental abnormality. Typical codes: Q45.0
An adult with a history of repaired congenital biliary atresia in childhood presents for routine surveillance and has chronic cholestasis and recurrent cholangitis as complications of the congenital biliary anomaly. The encounter documents the congenital malformation as the underlying cause of the current hepatobiliary complications and to guide care coordination and long-term management. Typical codes: Q45.1, Q45.8

ICD-10-CM Code For Other Congenital Malformations Of Tongue Mouth And Pharynx: Group Overview

Q39-CONGENITAL-MALFORMATIONS-OF-ESOPHAGUS

ICD-10-CM Code For Congenital Malformations Of Esophagus: Group Overview

Q40-OTHER-CONGENITAL-MALFORMATIONS-UPPER-ALIMENTARY-TRACT

ICD-10-CM Code For Other Congenital Malformations Of Upper Alimentary Tract: Group Overview

Q41-CONGENITAL-ABSENCE-ATRESIA-STENOSIS-SMALL-INTESTINE

ICD-10-CM Code For Congenital Absence, Atresia And Stenosis Of Small Intestine: Group Overview

Q42-CONGENITAL-LARGE-INTESTINE-MALFORMATIONS

ICD-10-CM Code For Congenital Absence, Atresia And Stenosis Of Large Intestine: Group Overview

Q43-OTHER-CONGENITAL-MALFORMATIONS-OF-INTESTINE

ICD-10-CM Code For Other Congenital Malformations Of Intestine: Group Overview

Q44-CONGENITAL-MALFORMATIONS-OF-GALLBLADDER

ICD-10-CM Code For Congenital Malformations Of Gallbladder, Bile Ducts And Liver: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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ICD-10-CM Code For Other Congenital Malformations Of Digestive System: Group Overview

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ICD-10-CM Q45: Other Congenital Malformations Of Digestive System Overview

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ICD-10-CM Q45: Other Congenital Malformations Of Digestive System Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Other Congenital Malformations Of Digestive System: Group Overview

Sign up for ICD-10-CM Code For Other Congenital Malformations Of Digestive System: Group Overview policy alerts

ICD-10-CM Q45: Other Congenital Malformations Of Digestive System Overview

ICD-10-CM Code For Other Congenital Malformations Of Digestive System: Group Overview

Sign up for ICD-10-CM Code For Other Congenital Malformations Of Digestive System: Group Overview policy alerts

ICD-10-CM Q45: Other Congenital Malformations Of Digestive System Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes are included in the Q45 group?

What clinical situations does ICD-10-CM group `Q45` represent?

How does accurate coding within `Q45` affect billing and reimbursement?

Which DRGs are related to the Q45 code group for reimbursement grouping?

When should a coder choose `Q45.9` versus a more specific `Q45` code?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes are included in the Q45 group?

What clinical situations does ICD-10-CM group `Q45` represent?

How does accurate coding within `Q45` affect billing and reimbursement?

Which DRGs are related to the Q45 code group for reimbursement grouping?

When should a coder choose `Q45.9` versus a more specific `Q45` code?

References