Has anyone had luck negotiating a balance down with Stanford Healthcare?

Long story short: A couple of telemedicine visits with a specialist (referred from my PCP) and a couple of tests turned into a ~$2500 balance. Insurance took about $1500 off the gross total of $4k.

This balance has turned out far higher than I expected and I'm looking for tips to bring it down as I can't pay the full amount in one shot.

I tried the advice in this post, but they responded that Medi-Cal rates are not relevant since I'm on private insurance, and that they don't negotiate balances.

I was thinking of doing the following:

1) Call them up and ask if they can reduce the balance since I can't pay the full amount in one shot. Ideally a 50% discount.

2) Ask for the cash rate

3) If all else fails, just send monthly payments that I can afford right now ($100/month), call them up after 6 months and offer to pay half of the remaining balance then.

Has anyone had success with any of these approaches, or would recommend another approach?

Since SB1061 was passed, I figure there is limited downside to this approach since medical debt cannot be used in credit reports.