| Cover Page | Feb. 17, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 17, 2021 |
| Entity Registrant Name | VERACYTE, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-36156 |
| Entity Tax Identification Number | 20-5455398 |
| Entity Address, Address Line One | 6000 Shoreline Court |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | South San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94080 |
| City Area Code | 650 |
| Local Phone Number | 243-6300 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value, $0.001 per share |
| Trading Symbol | VCYT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001384101 |
