| Cover | May 25, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 25, 2021 |
| Entity File Number | 001-37478 |
| Entity Registrant Name | Natera, Inc. |
| Entity Central Index Key | 0001604821 |
| Entity Tax Identification Number | 01-0894487 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 13011 McCallen Pass |
| Entity Address, Address Line Two | Building A, Suite 100 |
| Entity Address, City or Town | Austin |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78753 |
| City Area Code | 650 |
| Local Phone Number | 249-9090 |
| 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 $0.0001 per share |
| Trading Symbol | NTRA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
