Excludes1 pair
Q24.0 vs Q89.3
Q24.0 and Q89.3 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on Q24.0
dextrocardia with situs inversus (Q89.3)
Q24.0
Dextrocardia
Billable
- Chapter 17
- Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q20-Q28
Indexed under
- Dextrocardia (true)
- Transposition › heart
- Malposition › congenital › heart › dextrocardia
Q89.3
Situs inversus
Billable
- Chapter 17
- Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q80-Q89
Use when the record says
- Dextrocardia with situs inversus
- Mirror-image atrial arrangement with situs inversus
- Situs inversus or transversus abdominalis
- Situs inversus or transversus thoracis
- Transposition of abdominal viscera
- Transposition of thoracic viscera
Indexed under
- Kartagener's syndrome or triad (sinusitis, bronchiectasis, situs inversus)
- Sinusitis-bronchiectasis-situs inversus (syndrome) (triad)
- Situs inversus or transversus (abdominalis) (thoracis)
- Levocardia › with situs inversus
- Syndrome › Kartagener's
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027