Los Angeles , California ( CNN ) -- The Los Angeles County coroner 's office has subpoenaed medical records from 20 doctors in its investigation into actor Corey Haim 's death , a coroner investigator said . Haim , who died earlier this month , obtained drugs using prescriptions written under the names of these doctors in the past year , Los Angeles County Deputy Coroner Ed Winter told CNN on Friday . California drug investigators found evidence that Haim , who fought a decades-long battle with drug abuse , used at least one fake prescription to obtain a narcotic in the months before he died , California Attorney General Jerry Brown said last week . The coroner is waiting for toxicology results before deciding if drugs were involved in the death of the 1980s teen movie actor , Winter said . Those test results are several weeks away , he said . An autopsy revealed that Haim , 38 , suffered from pneumonia , an enlarged heart and water in his lungs when he collapsed at his Los Angeles home on March 10 , Winter said . `` We get medical records all the time , '' Winter said . `` What 's kind of unusual in this is how many doctors are involved . '' Pharmacy records show the actor got thousands of potentially dangerous pills from multiple doctors in the past year , according to Brown . State investigators know that Haim obtained `` massive amounts '' of legal drugs `` in what looks to me like a questionable manner because of so many doctors , '' Brown said . `` How many people go to 10 or 15 or 20 doctors and then run around to 10 , 12 and more pharmacies to go fulfill them and sometimes two different doctors in the same day ? '' Brown asked . Haim did not necessarily visit all of the doctors , but the prescriptions carried their names , he said . An arrest was made last week in connection with an `` illegal and massive prescription drug ring '' connected to at least one of Haim 's prescriptions , Brown said . The ring involved the use of stolen identities from doctors to order official prescription pads , he said . `` Once they get that prescription pad in the doctor 's name , then they can write a prescription , or they can sell it to someone to write a prescription like Corey Haim , '' Brown said . `` Then he can go into the pharmacy and get his legal drugs illegally . '' Although the actor 's family said Haim had reduced his drug use to near zero , Brown said that he did n't see `` any 'zero ' pill consumption . '' `` If he took all the pills that our records show he was prescribed over the last year and three months , he took very damaging assaults on his body , '' Brown said . Haim 's most recent prescription was filled March 5 for Vicodin , he said . `` In the weeks before that , more Vicodin , more Valium and other things , '' Brown said . `` If you go back to 2009 , you 're talking thousands of pills , '' he said . `` You 're talking many , many doctors . I doubt if they know about each other . You 're talking about many , many pharmacies . '' In recent years , the actor was reunited with longtime friend and frequent co-star Corey Feldman in a reality show . `` The Two Coreys '' ran for two seasons on the A & E Network before it was canceled . Haim 's most famous role was in the 1987 movie `` The Lost Boys , '' in which he also appeared with Feldman . Haim played a fresh-faced teenager whose brother becomes a vampire .
Coroner issues subpoenas for records of 20 doctors in Haim death inquiry . Attorney general says at least one of Haim 's prescriptions linked to prescription drug ring . The Associated Press contributed to this report. Toxicology results , which are weeks away , to help determine if drugs were involved in death .