{{Rsnum
|rsid=4646438
|geno1=(A;A)
|geno2=(-;A)
|geno3=(-;-)
|Orientation=minus
|ReferenceAllele = 
|ReferenceAllele=
|Chromosome=7
|position=99766411
|Gene=CYP3A4
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|Gene_s=CYP3A4
}}[[rs4646438]], also known as 830_831insA, 17661_176622insA or 277Frameshift, is a SNP in the [[CYP3A4]] gene.

The [[rs4646438]](A) allele defines the CYP3A4*6 variant.