Joan Rivers' net worth was built upon a long-standing career in show business that went on for decades - after her recent death post-surgery, rumors have spread across the media that death came upon the star due to medical negligence.

Her daughter Melissa Rivers has decided to take legal action against the doctor who operated on her mother before the collapse that led to her death - all while she's inherited Joan Rivers' net worth, or at least will have to share it with her mother's pets.

Joan Rivers' death has sparked many rumors of medical negligence, as it was reported that during the operation, one of the doctors took an unauthorized biopsy of her throat - a procedure he wasn't legally allowed to make, as he lacked permission from either Rivers, her family nor even the New York City legislation, which demands physicians to get a license for every particular clinic or hospital they will be operating in.

After Joan's death, there have been weeks of statements from the clinic where the comedienne's surgery took place (which is to say Manhattan's Yorkville Endoscopy), where the doctors have denied ever having performed the biopsy on Rivers or really any other patient the clinic's ever treated. Recently, however, Joan's daughter Melissa Rivers announced that she would be taking legal action against the doctor that took the unauthorized biopsy of her mother.

Joan Rivers' net worth includes years of high wages, one of the world's largest collections of Imperial Russia's Fabergé eggs and even a New York penthouse that the comedienne once compared to Marie-Antoinette's castle. Her lavish funeral, featured performances by Hugh Jackman, the New York City Gay Men's Chorus, Audra McDonald and the New York City Police Department Emerald Society bagpipers and drummers; and the grand and star-filled event should have been something of a proof of Joan Rivers' net worth, after the famous comedienne was reportedly taking in a salary of $40 million a year.

At the time of her death, Joan Rivers' net worth was $150 million, which was inherited entirely by her daughter Melissa - although it's been said that the late comedienne also made sure her beloved dogs were taken care of.