My father passed away after being misdiagnoised

I am very sorry for your loss. Basically it appears you believe your father was not properly and timely diagnosed. Certainly this can be the basis of a medical negligence claim. No one here can give you a definitive answer. There is only one way to know for sure. Malpractice is care and treatment that falls below the standard of care and causes injury. The standard of care is basically the level at which the average, prudent provider in a given community would practice. It is how similarly qualified practitioners would have managed the patient's care under the same or similar circumstances. Injury typically must be severe or permanent in order for the claim to be economically feasible to pursue even if there is malpractice. These cases are very expensive and risky to pursue. Unless it appears there would be a meaningful economic recovery to the patient the cases are cost prohibitive to pursue. In order to find out if your father was the victim of negligence, you need to retain a lawyer willing to investigate the claim. The lawyer will gather your father's medical records and have them reviewed by a medical expert who will be asked to offer an opinion as to whether 1. the care and treatment he received fell below the applicable standard of care and 2. caused an injury. There is no claim to pursue unless and until such an opinion is secured. Your potential claim is further complicated by the fact you are in a Republican state. You voted for so-called "tort reform" since you were convinced there are frivolous lawsuits being filed. What you did not realize the target were claims like the one involving your father--since frivolous lawsuits are a rarity.

I'm sorry to hear, and certainly get the records reviewed to ascertain whether there was a breach of the standard of care