Pros
The big selling point of Healthfirst is its work from home option. Depending on team that you work for, they can be liberal when allowing work from home options. This is good because the actual work environment is incredibly toxic, see below.
Cons
Healthfirst had the most toxic work environment that I have witnessed in my career. First, I should note that I was involved in the hiring process and my superiors openly stated that they were adverse to hiring anyone that was 1.) Older 2.) Not "Americanized" (their words, not mine). Be mindful of these two factors when applying to Healthfirst. In addition, I was subjected to racism (I was told by a co-worker that he'd always be better than me because he had "white skin"), I witnessed blatant sexism (a female co-worker that had bought a Nintendo Switch was told "no wonder you're single!" by my BOSS because she's a woman that plays video games). When I went to my superiors or told HR about the environment, I was either called a liar or virtually ignored. I waited a month to meet with HR (the HR office is primarily based in Florida, so expecting anything to happen in the NY office is an exercise in futility). This company has also has a very turnover rate. I was the second most tenured member of my department that wasn't management. The department has ~15 people that aren't management. I ended up quitting without future employment lined up I found the environment so toxic. Working at Healthfirst was one of the most difficult periods of my life.