If your provider is unwilling to provide you with a Medical Source Opinion Letter, carefully consider the reason they give.
1. It may be too early: Maybe your condition may or is likely to improve with further or different treatment.
2.The provider may believe (rightly or wrongly) that you are not disabled. Sometimes a provider may feel unqualified to render an opinion if some of your conditions are outside their area of practice (for example, you have both mental and physical ailments).
3.It may be against their policy: Some providers just have a policy of not providing MSOLs. If that is the case, please consider contacting a representative in your area who can help you with your case.