2027 ICD-10-CM Diagnosis Code Q45.9Congenital malformation of digestive system, unspecified
ICD-10-CM Codes›Q00-Q99›Q38-Q45›Q45
- Billable — Valid for Submission
- POA Exempt
- Chronic Condition
Q45.9 is a billable ICD-10-CM diagnosis code for congenital malformation of digestive system, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Digestive congenital anomalies.
Code Identity
Code Classification
Present on Admission (POA)Billing
Q45.9 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Other congenital malformations of the digestive system (Q38-Q45).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Congenital anomaly of digestive organ
- Congenital anomaly of digestive system
- Congenital anomaly of digestive tract
- Congenital anomaly of gastrointestinal tract
- Congenital anomaly of lower alimentary tract
- Congenital fecal incontinence
- Cutis laxa with severe pulmonary, gastrointestinal and urinary anomalies
- Cutis laxa, autosomal recessive
- Digestive system hereditary disorder
- Gastrocutaneous syndrome
- Oculogastrointestinal neurodevelopmental syndrome
- Trichohepatoenteric syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Q45.9: its own notes plus those printed at Q45 and Chapter 17. 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.
- Congenital anomaly of digestive system
- Congenital deformity of digestive system
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.
Notes
General instructions on how these codes are used.
- Codes from this chapter are not for use on maternal records
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.
Anomaly, anomalous (congenital) (unspecified type) Q89.9
alimentary tract Q45.9
gastrointestinal tract Q45.9
mesentery Q45.9
Malformation (congenital) See Also: Anomaly;
alimentary tract Q45.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Birth Defects
A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.
The full article covers:
- What are birth defects?
- What causes birth defects?
- Who is at risk of having a baby with birth defects?
- How are birth defects diagnosed?
- What are the treatments for birth defects?
- Can birth defects be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert Q45.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Q45.9Overview
What is the ICD-10 code for congenital malformation of digestive system, unspecified?
The ICD-10-CM code for congenital malformation of digestive system, unspecified is Q45.9 (sometimes written as Q459). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is Q45.9 (Other congenital malformations of digestive system) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report congenital malformation of digestive system, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Q45.9 group to?
When congenital malformation of digestive system, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.
Is Q45.9 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for congenital malformation of digestive system, unspecified on inpatient claims. The code appears in the Other congenital malformations of the digestive system (Q38-Q45) range of the CMS exempt list.
What is the ICD-9 equivalent of Q45.9?
Under the General Equivalence Mappings, congenital malformation of digestive system, unspecified converts to ICD-9-CM 751.9 (anom digestive syst NOS). The mapping is a direct match.
