Trans Meds
I have a feeling it's because the pharmacy at Northgate is attached to the KP clinic that has half the local doctors who are trained to actually work with trans patients and can prescribe HRT. Like, if anyone in the area is trans and is in their system / has KP insurance they'd generally get it from the Northgate or Capitol Hill pharmacies.
The Bellevue and Redmond ones apparently were overflowing with hormones...