 Total cholesterol levels of 350–550 mg/dL are typical of heterozygous FH while total cholesterol levels of 650–1000 mg/dL are typical of homozygous FH.The LDL is typically above the 75th percentile, that is, 75% of the healthy population would have a lower LDL level.Cholesterol levels can be drastically higher in people with FH who are also obese.