Final answer:
The certification needed for OP therapy under Medicare Advantage is Occupational Therapy Certification. Therapists must maintain valid certification to provide services covered by Medicare Advantage plans.
Step-by-step explanation:
The certification needed for OP therapy under Medicare Advantage is b) Occupational Therapy Certification. Occupational Therapy, or OP therapy, is a form of healthcare designed to help individuals regain or develop skills necessary for daily living and working. Medicare Advantage plans, which are alternative plans to Original Medicare offered by private insurance companies, typically cover OP therapy services. However, to provide OP therapy services to patients under Medicare Advantage, therapists must have a current and valid Occupational Therapy Certification from an accredited program and maintain that certification as required by their state or professional standards.