Ask Social Security Questions and Get Answers ASAP
Please be aware - if the person drop Part B or choose not to apply when eligible - that person generally won’t be able to enroll in Part B again until the next General Enrollment Period (January 1 – March 31st) and may have to pay a late enrollment penalty.The monthly premium for Part B may go up 10% for each full 12-month period that the person could have had Part B, but didn't sign up for it.
Based on your information - it doesn't look as your spouse qualifies for SEP - special enrollment period.Foe specific requirements - see following publication that set three qualification requirements.http://www.medicarerights.org/PartB-Enrollment-Toolkit/PartB-Special-Enrollment-Period.pdf
His enrollment date must be based on his eligibility. As he choose NOT to enroll - that was his choice - and he will be eligible to enroll during the next General Enrollment Period only - January 1 – March 31st.