I also got my credit check yesterday! Experian told me the check was from "NHSC LRP/SP/HRSA".
Based on previous years' credit checks, it looks like we can expect the first round on or possibly before July 11/12 at the earliest. Though a lot of previous years released August. In 2019, the first credit check came out on July 15 (also a Monday) and the first round of finalists was released August 6. In 2020, the first credit check came out August 10 (also a Monday), and the first round of finalists was released August 19. 2020 was a fast turnaround time but there was also delays and extensions due to COVID. I can't find official dates for 2021 but my friend who got it said her credit check was somewhere July when our summer quarter began and her (not sure if it was the first) round of applicants was around August 11/12.
Also a thing of note, watch out for when the website says it will go under maintenance. Apparently, NHSC said it would go under maintenance August 20, 2020 and the finalists were released August 19, 2020.