I wonder whether it's to do with getting a prescription? When I was in hospital, I was prescribed painkillers and my doctor told me to get a repeat prescription from my GP if I needed any more. When I needed more, I had to see my GP to be prescribed the same pills - something to do with them getting the funding rather than the hospital.
So because Fatty likes doctor shopping, doesn't like being told the truth about her health, and doesn't like to pay her medical bills, maybe she's not registered with a primary care doctor? Also explains why she keeps visiting the ER rather than a primary care doctor. So she was prescribed her pills for a certain length of time, by her specialist, but now she needs to see her primary care doctor for more? So it's her fault, but she's trying to blame medical professionals yet again.
I know she 'claims' she takes anti-depressants etc, but a 'therapist' can probably get a shady doctor just to sign for her to get them. Makes all her mentulz seem even more suspect.
Edited cos I'm not a doctor cos I'm too stupid.