Doctor Salvador Plascencia, 42, has also been charged with conspiracy to distribute ketamine
Plasencia is charged with seven counts of distribution of ketamine and two counts of altering and falsifying documents or records related to the federal investigation.
The other three defendants were charged separately and two have pleaded guilty, with a third agreeing to plead guilty.
Fleming admitted to obtaining the ketamine from Sangha and distributing it to Iwamasa, who admitted then giving the drug to the star.
On one occasion, Iwamasa is said to have met with Plascencia in a public Long Beach parking lot where the doctor injected the star with ketamine inside a vehicle.
Two days later, he did the same thing with a large dose of ketamine at Perry's home that caused him to 'freeze up' and his blood pressure to significantly spike, the indictment says.
Plasencia told Iwamasa something to the effect of: 'Let's not do that again,' but he still left additional vials of ketamine with Iwamasa for injecting Perry with, court papers say.
Meanwhile in his plea agreement, San Diego doctor Chavez admitted to diverting supplies from his clinic, to Plascencia by filling out fake prescriptions.