| Cover | Dec. 01, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 1, 2021 |
| Entity File Number | 001-40501 |
| Entity Registrant Name | iSPECIMEN INC. |
| Entity Central Index Key | 0001558569 |
| Entity Tax Identification Number | 27-0480143 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 450 Bedford Street |
| Entity Address, City or Town | Lexington |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02420 |
| City Area Code | 781 |
| Local Phone Number | 301-6700 |
| 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 |
| Trading Symbol | ISPC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
