I37 vs Q22.1
I37 and Q22.1 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
I37
Nonrheumatic pulmonary valve disorders
Not billable
- Chapter 9
- Diseases of the circulatory system
- Section
- I30-I5A
Q22.1
Congenital pulmonary valve stenosis
Billable
- Chapter 17
- Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q20-Q28
Indexed under
- Fusion, fused › pulmonic cusps (congenital)
- Stenosis, stenotic › pulmonic (cicatricial)
- Fusion, fused › cusps, heart valve NEC › pulmonary (congenital)
- Anomaly, anomalous › pulmonary › valve › stenosis (congenital) (unspecified type)
- Stenosis, stenotic › pulmonary › valve › congenital (cicatricial)
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
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