If i have a medical document that was signed by my family doctor stating that im permanently disabled and a perfect candidate for SS or SSI

I would call that a good start. You can certainly file and it is free to do so at http://ssa.gov/pgm/disability.htm  The reason it is "a good start" is that the statement is a conclusion, and one that is reserved to the Commissioner of the Social Security Administration to make, based on evidence.  You will need more than the medical document. It would be good to consult an attorney (see link below) as it can be frustrating and confusing to find your way through what is necessary to win your case.  Often, without help, it is too hard on you - after all, you are suffering from a medical disability. PLEASE NOTE the following:  An attorney-client relationship is not being established because of the information provided above; an in person consultation is always best when you have a legal problem; DO NOT RELY on information for a legal remedy without having contacted a lawyer; facts and circumstances of every case have to be applied to the law that is relevant for the state or location in question; NEVER rest on a right or defense you may have - legal rights are not like wine - they don't improve with age or time time limits can completely prohibit recovery; TO SEEK LEGAL ADVICE IMMEDIATELY go to http://goo.gl/cf1UM to find someone in your state.  Be sure to visit my website for answers to other Social Security Disability questions. http://haller-law.com/faq  

Although medical documentation from a treating physician documenting your disability and limitations is very helpful, it may not be enough to make you eligible you for SSDI or SSI. The Social Security Administration uses a sequence of steps in determining whether a particular medical condition or a particular set of limitations make the applicant eligible.  Many factors play a role in determining eligibility including medical conditions, age, education, prior work experience, and the ability to perform work related tasks such as standing, sitting, and lifting. There are also criteria that are not directly related to your disability such as citizenship status. If you have applied for benefits and have not yet been denied, submit a copy of your doctor's report to your local Social Security Administration office.  Your doctor's opinion will carry considerably more weight if it is supported by copies of lab reports or medical test results that support the opinion. If you have been denied benefits you should consult with a lawyer who practices Social Security Disability Law.