Final answer:
A dual-eligible client can enroll in, or make changes to, Medicare and Medicaid plans outside of typical enrollment periods, as they have special enrollment periods due to their unique coverage qualifications.
Step-by-step explanation:
The question asks about the type of enrollment period a client that is dual-eligible might have. A client who is dual-eligible is someone who qualifies for both Medicare and Medicaid benefits. These individuals have special enrollment periods due to their unique healthcare coverage situation. Instead of being restricted to the usual annual enrollment periods, dual-eligible clients can make changes to their health care plans outside of the typical timeframes.
Referencing the provided data, Enrollment Frequency appears to be unrelated to the specific question of a dual-eligible client's enrollment period types. This table might be part of a larger analysis in a health-related study, but it does not directly inform us about the enrollment periods for dual-eligible clients. For a dual-eligible client, enrollment options are more flexible and include multiple opportunities throughout the year to join, switch, or drop Medicare Advantage plans or Medicare Prescription Drug plans.