I have Kaiser HMO. You will have some infertility coverage - 50% for everything except IVF. There is no coverage for IVF. The thing I don't like about Kaiser is that you have to use them. I am going to have my DH switch us to a PPO when open enrollment happens so that I'll have choice of doctors.
I've heard Kaiser in SoCal is better than Kaiser in Northern Cali. I'm in Northern Cali and have had a LOT of problems with Kaiser and our infertility challenges. One ex: it took 7 days for our semen analysis results and then Kaiser gave us a result of "no result" becasue their labs can't analyze small samples - his volume was low but had about 15 million total. We went through that process 2X. What kind of lab does that? But it didn't cost anything.
The semen analysis at the RE's cost a few hundred but was worth it to me. You can also walk into Kaiser and pick up an infertility price sheet.