Looking for the best record of approvals with both mental health and physical health diagnoses

Psychiatrist has advised me to start the disability process as my mental health has reached the point that he does not see improvement of my bipolar, adhd, ocd, ptsd, rapid relapse of major depressive disorder and severe anxiety attacks, as a possibility and I also have worsening physical health with back, knee and foot surgeries, severe ongoing arthritis, bulging discs, degenerative spine disease, multiple falls and the need for assistance in multiple areas of my life that has not been previously needed.