Adding a few more to your list: If you take Phil at his word he has a back injury, had burns to his face, heartburn/acid reflux, and chronic ear infections. The back injury is a "maybe" because he walks/waddles funny but his explanations of how it happened are mutually incompatible, the burns are obvious BS and the ear infections may be BS because he leaks showed he never saw a doctor for them but heartburn is credible. I suspect he may have vitamin/nutrient deficiencies as well due to his fast-food diet and lack of Vitamin D from being a shutin. He also has weird twitches/tremors in his face, no idea what causes those but a stroke is one possibility. If you want to be petty and twist the knife you could add balding to the list. It's not really an illness but it can be treated by doctors and Phil gets absurdly defensive when people point out his bald spots. Only in the Pigverse could going bald be more of a concern than a possible stroke before age 40.
If we expand the diagnoses to the mental health front he likely has autism, NPD, and paranoia and may have an anxiety disorder. He denies these but has claimed to have depression and to have been put on multiple psych meds in high school because he was stalking a girl.
Edit:
Jaundice refers to yellow skin, in the recent unfiltered photo from the main thread he looked pale as a ghost:
Edit x2: added more sperging.