JCFZ

You will be able to add your fiance to your insurance, once you marry. No waiting for the green card is required. She is eligible upon the marriage. Do not wait on this, as you have a limited timeframe, and you do not want to be stuck without. Green cards are taking an extremely long time now, absolutely don't wait.
 
Your other options would be to use the health exchange (federal or state if you have one), or buy a plan privately. Temporary insurances and 'new immigrant' coverage are not ACA compliant and offer very little in the way of pre-existing coverage.
 
You may be told that your wife requires an SSN to obtain health insurance. Commonly many HR reps and even phone reps for companies will erroneously or maliciously state such falsehoods. By law it is not required to have an SSN for insurance, however it will make obtaining it a lot less fuss. Typically once the K1 has been issued and the fiance enters the US, they can go to the SSA and file for an SSN before they marry (you can find threads on this on VJ).
 
So what did we do?
 
Got K1 and entered US.
Waited 2 weeks (this no longer applies anymore and you can apply asap as long as the fiance is in the system - check the I94).
Applied for SSN (remember the fiance IS eligible to apply, if the SSA employee gives you a problem ask for supervisor or apply at another branch).
Got married. SSN had arrived by that time.
Added husband to my insurance plan. They did not ask for an SSN. The law states that they can and may ask several times to provide it (they did ask eventually), but you do not have to give it out if you do not want to. This really is for IRS identifying purposes, and the only person who is truly authorized to obtain the number is the IRS directly.
Applied for AOS with EAD.
Got EAD. Applied for first driver's license. 
By this point the spouse may start working, so they may be able to obtain insurance from their own employer. 
Once you have the green card, return to the SSA and update (remove restrictions) from the SSN. Update driver's license if applicable. 

Hi all,
 
I am very happy that announce that my fiancees visa was approved. We were part of the bunch that had scheduled interviews on 9/28, but were then postponed to 10/6. From what she told me, the process was pretty straightforward once she was at the embassy. As for the interview, she said the questions were pretty straight forward and general. We even got our pictures from the K1 packet back. After several general questions, the agent said "Felicitations!" and gave her information about the next steps (validity of visa, rights as a visa holder, etc.).
 
Immediately after the interview, the visa status on CEAC was "administrative processing." The next day it was changed to "issued." We are now waiting for any notification that the visa is ready to be picked up (she chose this option because she lives in Paris). 
 
Thank you to you all, you have been so kind and helpful throughout this process. For those who are still waiting, my heart goes out to you! There is light at the end of the tunnel. 

Hi all,
 
I am very happy that announce that my fiancees visa was approved. We were part of the bunch that had scheduled interviews on 9/28, but were then postponed to 10/6. From what she told me, the process was pretty straightforward once she was at the embassy. As for the interview, she said the questions were pretty straight forward and general. We even got our pictures from the K1 packet back. After several general questions, the agent said "Felicitations!" and gave her information about the next steps (validity of visa, rights as a visa holder, etc.).
 
Immediately after the interview, the visa status on CEAC was "administrative processing." The next day it was changed to "issued." We are now waiting for any notification that the visa is ready to be picked up (she chose this option because she lives in Paris). 
 
Thank you to you all, you have been so kind and helpful throughout this process. For those who are still waiting, my heart goes out to you! There is light at the end of the tunnel. 

Hi all,
 
I am very happy that announce that my fiancees visa was approved. We were part of the bunch that had scheduled interviews on 9/28, but were then postponed to 10/6. From what she told me, the process was pretty straightforward once she was at the embassy. As for the interview, she said the questions were pretty straight forward and general. We even got our pictures from the K1 packet back. After several general questions, the agent said "Felicitations!" and gave her information about the next steps (validity of visa, rights as a visa holder, etc.).
 
Immediately after the interview, the visa status on CEAC was "administrative processing." The next day it was changed to "issued." We are now waiting for any notification that the visa is ready to be picked up (she chose this option because she lives in Paris). 
 
Thank you to you all, you have been so kind and helpful throughout this process. For those who are still waiting, my heart goes out to you! There is light at the end of the tunnel. 

Hi everyone,
 
Great news! Today we received something from the embassy in France. We're happy but definitely confused. Once we got a notification that our case had been sent to Paris from the NVC, and then that it was "Ready," we went ahead and filled out the DS-160 (on 6/29/21). We have still not received a P3. However, today we received an email with an interview date (9/28/21)! We are ecstatic, but a little confused as to why we haven't gotten a P3?
 
Also, the email contains a link for https://ais.usvisa-info.com/, where we are supposed to make an account, login, and then pay the visa fee? However, we are stuck because when prompted to select a "Visa Class," all other visas seem to be an option besides K visas! It states that if your Visa Class is not listed, then send an email. Has anyone heard of this issue before?
 
Thanks for any insight! And best wishes to all those still waiting. 
 
JCFZ

I'm not certain what the relation is, I think the fae email handles technical issues only and this seems to be one. You have your email to prove you were given a date. They always respond within a few days.
 
The Paris embassy will certainly not respond quickly. In over 3 months of emailing them bi weekly then eventually daily I only ever got 2 responses. 
 
You could also try calling the embassy to ask. 

Hi everyone,
 
Great news! Today we received something from the embassy in France. We're happy but definitely confused. Once we got a notification that our case had been sent to Paris from the NVC, and then that it was "Ready," we went ahead and filled out the DS-160 (on 6/29/21). We have still not received a P3. However, today we received an email with an interview date (9/28/21)! We are ecstatic, but a little confused as to why we haven't gotten a P3?
 
Also, the email contains a link for https://ais.usvisa-info.com/, where we are supposed to make an account, login, and then pay the visa fee? However, we are stuck because when prompted to select a "Visa Class," all other visas seem to be an option besides K visas! It states that if your Visa Class is not listed, then send an email. Has anyone heard of this issue before?
 
Thanks for any insight! And best wishes to all those still waiting. 
 
JCFZ

JK,
 
Thank you so, so much for this quick and informative reply. One big positive about this tough process is that the VJ community is really awesome. Incredible generosity around here. Thank you sincerely.
 
Looks like it's more waiting then. This is unfortunately what I expected. Have you submitted your DS-160 as well?

Wow, congrats!
 
This is very promising! Thank you very much for you helpful and informative reply. Best of luck! 

We were together when we filed and did one joint letter, which we both signed.  Approved with no problems.

Two - one each.  Also have passport photo taken - it can be more convenient there.