There are several types of professionals who typically diagnose ADHD. These include: physicians (especially psychiatrists, pediatricians, neurologists), psychologists, social workers, nurse practitioners, and other licensed counselors or therapists (e.g. professional counselors, marriage and family therapists, etc.). [1]
Some examples of professionals who are capable of diagnosing ADHD include: pediatricians, psychiatrists, family physicians, nurse practitioners, psychologists, psychotherapists. [2]
[2] https://www.medicalnewstoday.com/articles/adhd-doctor