The ONCC offers eight options for certification: • Basic: • OCN: Oncology Certified Nurse • CPON: Certified Pediatric Oncology Nurse • CPHON: Certified Pediatric Hematology Oncology Nurse • Specialty: • BMTCN: Blood and Marrow Transplant Certified 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 Certification is granted for four years, after which it must be renewed by taking a recertification test or by earning a certain number of continuing education credits.