{{23andMe SNP 
| Gene = CYP2D6 
| position = 40854879 
| Chromosome = 22 
| geno1 = (A;A) 
| geno2 = (A;G) 
| geno3 = (G;G)
}}Also known as 1858C>T, the (A) allele is a marker for CYP2D6*4F non-functioning variant.

{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}