{{Rsnum
|rsid=4404254
|Gene=ICOS
|Chromosome=2
|position=203960563
|Orientation=plus
|GMAF=0.2635
|Gene_s=ICOS
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 5.4 | 38.4 | 56.2
| HCB | 1.5 | 23.4 | 75.2
| JPT | 3.5 | 28.3 | 68.1
| YRI | 17.8 | 46.6 | 35.6
| ASW | 10.5 | 47.4 | 42.1
| CHB | 1.5 | 23.4 | 75.2
| CHD | 4.6 | 29.4 | 66.1
| GIH | 15.0 | 43.0 | 42.0
| LWK | 27.5 | 45.9 | 26.6
| MEX | 3.4 | 37.9 | 58.6
| MKK | 16.8 | 54.8 | 28.4
| TSI | 4.9 | 33.3 | 61.8
| HapMapRevision=28
}}{{PMID Auto
|PMID=22977635
|Title=Association study between polymorphisms of CD28, CTLA4 and ICOS and non-segmental vitiligo in a Korean population
|OA=1
}}

{{PMID Auto
|PMID=19202444
|Title=Association of genetic variation in inducible costimulator gene with outcome of kidney transplantation.
}}

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}