Carol Biggs Mckenzie. Her primary practice is as , also practicing as a Registered Nurse: Addiction (Substance Use Disorder), a Registered Nurse: Community Health, a Registered Nurse: Psych/Mental Health, Child & Adolescent, a Registered Nurse: Psych/Mental Health, Adult, a Case Manager/Care Coordinator, a Clinical Nurse Specialist: Psych/Mental Health, Child & Adolescent, a Clinical Nurse Specialist: Psych/Mental Health, Adult, and a Counselor: Mental Health.