if i went to the hospital because my kidney stop functioning and they sent me home and said nothing is wrong and 4 days later i go to another hospital

Of course that is inappropriate care. You probably do not have a viable malpractice case if this did not cause you a permanent problem, but you are entitled to better treatment. You should consider contacting the Department of Health in CA. They likely have a division that will allow you to report the mistreatment.  Click here for information about how to file complaints about doctors, nurses, hospitals and nursing homes in the state of California.  The articles below discuss the issue of financial viability, which is the problem that I think you face in pursuing a malpractice claim.  Click here for an article that discusses the three main questions I ask when deciding whether to investigate a potential medical malpractice case. Click here for an article that explains what you can and should expect when pursuing a medical malpractice case. Click here and here for more information about me. Please note that by attempting to answer your question, I am not acting as your attorney. I will do nothing further to protect or preserve your interests in the absence of any additional discussion with you about this matter. John Ratkowitz, Esq. Starr, Gern, Davison & Rubin, P.C. 105 Eisenhower Parkway Roseland, NJ 07068 Office: (973) 830-8441 Cell: (732) 616-6278 Fax: (973) 226-0031 Email: jratkowitz@starrgern.com  Skype: john_ratkowitz Click here for my website.