Yes, D64.9 is a billable ICD-10-CM code, but it is unspecified
Importantly, with time the majority of relapse-onset patients will transition to a clinically progressive course [known as secondary progressive MS (SPMS)] characterized by cytodegeneration, while the inflammatory component wanes with age (Compston and Coles, 2008)
At this concentration, a 4mg dose requires a full 2mL injection, which is uncomfortably large and will likely hurt at the injection site
Continue to focus on a balanced diet, regular exercise, adequate sleep, and stress management as the cornerstones of your health
Griffiths, 2008
Oral supplementation has shown effectiveness but may not match the efficacy of IM in certain scenarios