ICD-10 Code for Duplication

The ICD-10-CM 2027 alphabetic index lists duplication, duplex with the subterms below. More specific codes depend on the details documented, as listed in the official index (17 codes, 17 billable).

Index entries for Duplication

alimentary tract – Q45.8
anus – Q43.4
appendix (and cecum) – Q43.4
biliary duct (any) – Q44.5
bladder – Q64.79
cecum (and appendix) – Q43.4
cervix – Q51.820
chromosome NEC – see also Trisomy
- with complex rearrangements NEC – Q92.5
- seen only at prometaphase – Q92.8
cystic duct – Q44.5
digestive organs – Q45.8
esophagus – Q39.8
frontonasal process – Q75.8
intestine (large) (small) – Q43.4
kidney – Q63.0
liver – Q44.79
pancreas – Q45.3
penis – Q55.69
respiratory organs NEC – Q34.8
salivary duct – Q38.4
spinal cord (incomplete) – Q06.2
stomach – Q40.2

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.