Specialist

A doctor that focuses on a specific area of medicine or a group of patients to diagnose, manage, prevent, or treat certain types of symptoms and conditions. If you are managing a long-term chronic condition, you are most likely required to obtain a new referral referral
The process and related documentation that is required when your provider sends you to receive services from another provider, typically in another area of expertise.
for specialty care on a periodic basis (typically every six months).