The BMPR2 c.1156G>C variant is a missense variant predicted to cause a glutamic acid to glutamine substitution at amino acid position 386. The variant is absent from the gnomAD v2.1.1 control and v4.1.0 populations (PM2_supporting). Only one patient with the variant has been reported (PMID: 26387786), and therefore, PS4 is not met. Glu386Gln is located in the catalytic kinase domain and is known to be an indispensable residue (PM1_strong). Other likely pathogenic missense variants causing a different amino acid change at the same residue have been reported, including Glu386Lys, Glu386Ala, Glu386Val, and Glu386Gly (PM5_supporting). Computational evidence for pathogenicity included a REVEL score of 0.961, which meets the threshold of >0.75 defined by the ClinGen Pulmonary Hypertension VCEP, and AlphaMissense 0.9837 (PP3 met but not BP4). Criteria not evaluated included PP1, PM6, and PS2 due to the absence of segregation evidence. Similarly, functional data is unavailable for this variant, so BS3 and PS3 were not evaluated. In summary, this variant meets the criteria to be classified as likely pathogenic (LP) for pulmonary arterial hypertension based on the ACMG/AMP criteria applied, as specified by the ClinGen Pulmonary Hypertension VCEP: PM1_strong, PM2_supporting, PM5_supporting, and PP3 (VCEP specification version 1.1, 1/18/2024).