In Massachusetts, a qualifying patient must have one of the following severe medical conditions diagnosed by a licensed physician: cancer, glaucoma, HIV/AIDS, hepatitis C, ALS (Lou Gehrig’s disease), Crohn’s disease, Parkinson’s disease, and multiple sclerosis. Additional conditions are subject to the Department of Public Health’s approval. To use medical marijuana for treatment, patients must register with the Department of Public Health and obtain a Massachusetts Medical Marijuana Card from EZMedcard. Once registered and approved, patients can purchase up to 10 ounces of usable marijuana from state-licensed dispensaries every month. Patients may also appoint a personal caregiver to purchase their medical marijuana.