Document and Entity Information
| Document and Entity Information | Feb. 28, 2022 |
| Cover [Abstract] | |
| Entity Central Index Key | 0001551306 |
| Document Type | 8-K |
| Document Period End Date | Feb. 28, 2022 |
| Entity File Number | 001-39100 |
| Entity Registrant Name | Progyny, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 27-2220139 |
| Entity Address, Address Line One | 1359 Broadway |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10018 |
| City Area Code | 212 |
| Local Phone Number | 888-3124 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | PGNY |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |