The big difference between group physician disability insurance policies and individual policies is that group policies calculate your actual benefits based on your health at the time you are trying to collect disability insurance benefits. Individual policies calculate your benefit limits based on your health at the time you originally purchase the policy.
For more information on group physician disability insurance and individual policies: http://www.www.mddisabilityquotes.com/blog/group-disability-vs-individual-disability-insuranc/