The ONCC offers six options for certification:

Basic:
OCN: Oncology Certified Nurse
CPON: Certified Pediatric Oncology Nurse
CBCN: Certified Breast Care Nurse
Advanced:
AOCN: Advanced Oncology Certified Nurse
AOCNP: Advanced Oncology Certified Nurse Practitioner
AOCNS: Advanced Oncology Certified Clinical Nurse Specialist