Update: To date I have only seen the Part D info for two of the plans---BCBS and NALC. I am not sure yet what the value would be to enrollees versus the regular plan Rx benefits. BCBS Part D versus regular BCBC Rx seems to be a very little cheaper?
I thought when FEHB announced they would open plans up to offer Part D, that it would be a number of standalone Part D plans which one could pick to go with any particular health plan. So far that does not seem to be the case. Rather, each participating plan is apparently choosing whether to offer their own version of a Part D plan. So far, I have read that the following plans are participating in 2024 (to offer a Part D option with the "regular" FEHB plan):
BCBS Standard, Basic, and Focus.
NALC High
MHBP Standard
APWU High
SAMBA High and Standard
Aetna Direct
Also, GEHA High and Standard are going to have a new Medicare Advantage (MA) option through UnitedHC: the other nationwide (open to all) MA plans for 2024 supposedly will be through NALC High, MHBP Std, APWU High, SAMBA High and Std, and Aetna Medicare Advantage. These of course use a Part D plan included. MA plans seem to be the direction FEHB is going in for annuitants.
One could also use a publicly offered standalone Part D plan to go along with a FEHB regular plan. I personally would consider this if I were choosing the regular GEHA Std plan because it would fit some of my spouse's Rx better.