Kelvin Richardson of Queens is now charged with manslaughter in the death of Latesha Bynum of Harlem.
Officials say, the 31-year-old died after receiving silicone buttocks injections at an apartment in Gramercy Park in July.
Richardson, the so-called "doctor" of the practice, has six prior arrests.
A woman who acted as his nurse is also charged with manslaughter in the case.