Hey, So my HP is different on my two characters. They are on the same account. Is it level required for the full prestige to show up?
Level is required. Until you're Level 100, your medal HP is maximum +500. At Level 100, it will become +1000, at Level 150, it will become +1500 and finally at Level 200, it will jump to +2500 (catching up to your other Level 200 character's medal HP).
That's because you only have 50 medals. If you want +1000 HP, you also need 100 medals. +1500 HP, 150 medals.