Terms Glossary
At Brooks Insurance Group, educating our clients is at the core of what we do. Use this glossary to brush up on important terms.
Enrollment Periods
AEP – Annual Enrollment Period
Oct 15–Dec 7 annually; time to join, switch, or drop Medicare Advantage or Part D plans.
OEP – MAOEP – Open Enrollment Period
Jan 1–Mar 31; allows those in a Medicare Advantage plan to switch MA plans or return to Original Medicare.
General Enrollment Period
January 1 to March 31 annually. For those who missed enrolling in Medicare Part A and/or Part B when first eligible. Coverage begins July 1, and penalties may apply.
SEP – Special Enrollment Period
Allows changes to Medicare plans outside standard periods due to life events like moving, loss of coverage, or gaining Medicaid eligibility.
SNP – Chronic, Institutional, Dual Eligible
A type of Medicare Advantage plan for people with chronic conditions, institutional care needs, or dual eligibility.
Penalties and Premium Adjustments
Late Enrollment Penalty
Fees for enrolling late in Part A (if not free), Part B, or Part D, unless you had creditable coverage.
IRMAA – Income-Related Monthly Adjustment Amount
A higher premium for Part B and Part D based on income.
Creditable Coverage
Prescription drug coverage considered equal to or better than Medicare’s standard—prevents Part D penalty.
Medicare Parts and Plan Types
Original Medicare
Consists of Part A (hospital) and Part B (medical).
Part A
Covers inpatient hospital care, skilled nursing, hospice, and some home health care.
Part B
Covers outpatient care, doctor visits, preventive services, and medical supplies.
Part C (Medicare Advantage)
Offered by private companies; includes Parts A and B, often Part D and extras like dental/vision.
Part D
Stand-alone prescription drug coverage or part of a Medicare Advantage plan.
Advantage Plans
Another name for Part C; includes medical and often drug coverage.
Medigap/Supplement Plans
Private insurance that helps pay for costs not covered by Original Medicare (e.g., coinsurance, deductibles).
Costs and Coverage Terms
Premium
The monthly amount paid for Medicare coverage.
Copayment
A fixed amount paid for a service (e.g., $20 per doctor visit).
Deductible
The amount you must pay before coverage begins.
Coinsurance
A percentage of costs you pay after meeting the deductible.
Cost Sharing
General term for the insured’s share of costs (copays, coinsurance, deductibles).
Maximum Out-of-Pocket
The most you’ll pay in a year for covered services in Medicare Advantage.
Medically Approved Amount
The amount Medicare agrees to pay for a covered service.
Medically Necessary
Services or supplies needed to diagnose or treat a condition per accepted standards.
Plan Structures and Care Access
Primary Care Doctor
The main physician for regular care and referrals.
HMO – Health Maintenance Organization
Requires use of network providers and referrals for specialists.
PPO – Preferred Provider Organization
Offers more provider flexibility, including out-of-network care (often at a higher cost).
Network
Group of doctors, hospitals, and providers contracted with a Medicare plan.
Preferred Pharmacy
Pharmacies with lower cost-sharing in your Part D or Advantage plan.
Low-Income and State Assistance
Medicaid
Joint federal/state program offering health coverage to low-income individuals, including some Medicare beneficiaries (dual eligible).
State Pharmaceutical Assistance Programs (SPAPs)
State programs that help pay Medicare drug plan costs.
State Health Insurance Assistance Programs (SHIPs)
Free counseling and assistance with Medicare choices and issues.
Prescription Drug Plan Structure
Deductible Stage
You pay 100% until your deductible is met.
Initial Coverage Stage:
Your plan pays a portion of drug costs, and you pay the rest (copay or coinsurance).
Coverage Gap (“Donut Hole”)
After reaching a set limit, you pay a higher share for drugs (gradually closing).
Catastrophic Stage
You pay reduced amounts once total out-of-pocket costs reach a set limit.
Formularies
The list of prescription drugs covered by a plan.
Tiering
Classification of drugs (usually 1–5); lower tiers cost less.
Preferred Pharmacy
Offers the lowest copay or coinsurance for covered drugs.
Quantity Limits
Restrictions on how much of a drug you can receive.
Step Therapy
Must try less expensive drugs before coverage for costlier alternatives.
Prescription Payment Plan
Option to spread Medicare drug costs over time.
Medicare “Extra Help” / LIS
A program that helps low-income beneficiaries with Part D costs.
Types of Care and Facilities
Skilled Nursing
Short-term rehab or medical care provided by trained professionals after hospitalization.
Inpatient Rehabilitation Facility
Provides intensive rehab for serious injuries or illnesses.
Long-Term Care
Non-medical care for chronic conditions; generally not covered by Medicare.
Hospice
Care focused on comfort for those with a terminal illness, covered under Part A.
Ambulatory Surgical Center
Outpatient facilities for same-day surgeries.
CMS and Medicare Oversight
CMS – Centers for Medicare and Medicaid Services
Federal agency that runs Medicare and Medicaid.
Star Ratings
Quality ratings (1–5 stars) for Medicare Advantage and Part D plans based on performance.
Service Area
Geographic area where a plan is available and provides coverage.
Annual Notices and Documentation
ANOC – Annual Notice of Change
Sent by Medicare plans each fall to explain changes for the next year.
Assignment
When doctors agree to accept Medicare’s approved amount as full payment.
Benefit Period
Starts when admitted to hospital/skilled nursing and ends after 60 days without care.
Lifetime Reserve Days
60 extra hospital days available after regular Part A benefits are used.
Preventive Services
Screenings, vaccines, and check-ups covered by Medicare to prevent illness.
Special Conditions and Eligibility
Beneficiary
A person enrolled in Medicare.
ALS – Amyotrophic Lateral Sclerosis
Qualifies for automatic Medicare enrollment upon diagnosis.
ESRD – End-Stage Renal Disease
Kidney failure requiring dialysis or transplant; qualifies for Medicare.
Appeals and Protections
Advance Coverage Decision
Request to confirm if a service/item will be covered before you receive it.
Appeal
Request to review and change a denied coverage or payment decision.
For more information, contact the Centers for Medicare & Medicaid Services.
Grievance
Complaint about a plan’s services, not related to a denial.
Guaranteed Issue Rights
Right to buy Medigap without medical underwriting in specific situations.
Guaranteed Renewable Policy
Insurer cannot cancel your policy if you pay premiums.
Medical Underwriting
Review of health status and preexisting conditions before issuing a Medigap policy (not allowed in some situations).
Durable Power of Attorney
Legal document appointing someone to make health/financial decisions if you're unable.