Q45.9
Congenital malformation of digestive system, unspecified
Q45.9 (also written Q459) is a billable ICD-10-CM diagnosis code for congenital malformation of digestive system, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 6 codes in category Q45 (Other congenital malformations of digestive system). The Alphabetic Index lists it under 8 entries. Its coding notes include 3 Excludes2 entries.
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)
Inclusion terms
Conditions classified to this code.
- Congenital anomaly of digestive system
- Congenital deformity of digestive system
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. 8 entries
- Anomaly, anomalous (congenital) (unspecified type), alimentary tract
- Anomaly, anomalous (congenital) (unspecified type), digestive organ (s) or tract
- Anomaly, anomalous (congenital) (unspecified type), gastrointestinal tract
- Anomaly, anomalous (congenital) (unspecified type), mesentery
- Deformity, alimentary tract, congenital
- Deformity, digestive organ NOS
- Deformity, gastrointestinal tract (congenital) NOS
- Malformation (congenital), alimentary tract