- ID card
- See Member ID card.
- Internal medicine
- A medical specialty focusing on the prevention, diagnosis and treatment of diseases affecting adults.
- Immunization center
- A location where providers administer vaccinations, such as a public health center, pharmacy or mall. May also include a physician office setting.
- Immunology
- The study of immunity and immune responses.
- Inpatient
- A facility, other than psychiatric, which primarily provides diagnostic, therapeutic (both surgical and non-surgical), and rehabilitation services by, or under, the supervision of physicians to patients admitted for a variety of medical conditions.
- Long-term care insurance
- Coverage designed to reduce the risk that the contract holder would need to deplete his or her assets to pay for long-term care.