Search the terms you see in Medicare notices, plan documents, enrollment materials, and conversations. Start with the simple meaning, then open the technical note when the distinction matters.
Medicare terms can sound similar while describing very different rules. A definition is a starting point. Enrollment rights, plan costs, provider access, and drug coverage still depend on the exact situation and current plan documents.
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Each definition is written for understanding first, with a technical note when a Medicare distinction deserves extra care.
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A written notice an Original Medicare provider or supplier may give you before certain items or services when they believe Medicare may not pay.
An ABN is not a denial by itself. It explains why Medicare may not cover the item or service, gives an estimated cost, and asks you to choose how you want to proceed.
The October 15 through December 7 period each year when you can make certain changes to Medicare Advantage and Medicare drug coverage for the next calendar year.
Medicare.gov often calls this Medicare Open Enrollment. Silver Path uses Annual Enrollment Period, or AEP, to keep it distinct from the separate Medicare Advantage Open Enrollment Period.
A plan notice sent each fall that explains changes in coverage, costs, provider networks, service area, and other plan details that will take effect in January.
Review the ANOC before the next plan year, even if you are satisfied with your current plan. Plan rules and costs can change from year to year.
A Medicare Part B preventive visit focused on updating or creating a personalized prevention plan. It is not the same as a routine physical exam.
Eligibility, frequency, and any additional services performed during the visit can affect what Medicare pays and what you may owe.
A formal request to review a decision about coverage, payment, or another Medicare or plan determination you disagree with.
The appeal path and deadlines depend on whether you have Original Medicare, Medicare Advantage, or drug coverage. Your notice should explain the next step and deadline.
An agreement by a doctor, provider, or supplier to accept the Medicare-approved amount as payment in full for a covered Original Medicare service.
When assignment is accepted, you generally owe only the applicable Medicare deductible and coinsurance for the approved amount.
The way Original Medicare measures certain inpatient hospital and skilled nursing facility use under Part A.
A benefit period begins when you are admitted as an inpatient to a hospital or skilled nursing facility and ends after you have not received inpatient hospital or skilled SNF care for 60 days in a row.
The Part D coverage stage that begins after your covered prescription drug out-of-pocket spending reaches the annual federal threshold.
The threshold can change each year. Review the current-year Part D amounts rather than carrying forward an older number.
The federal agency within the U.S. Department of Health and Human Services that administers Medicare and works with states to administer Medicaid and other health programs.
CMS sets many Medicare program rules, publishes guidance, and oversees Medicare health and drug plan requirements.
A type of Medicare Advantage Special Needs Plan designed for people with specific severe or disabling chronic conditions that the plan is approved to serve.
Eligibility depends on the condition categories served by the specific plan and Medicare requirements.
Temporary continuation of certain employer group health coverage after employment or another qualifying event ends.
For Medicare enrollment timing, COBRA is not the same as coverage based on current employment. Do not assume COBRA lets you delay Part B without consequences.
A percentage of the cost of a covered service or drug that you pay after any applicable deductible.
Coinsurance is different from a copayment because it is usually a percentage rather than a fixed dollar amount.
A fixed dollar amount you may pay for a covered service, item, or prescription.
A plan may use copayments for some services and coinsurance for others. Always check the current plan documents.
The first decision a Medicare drug plan makes about whether a drug is covered, whether plan requirements are met, what you must pay, or whether an exception applies.
If you disagree with a coverage determination, you may have appeal rights. Expedited processes can apply in certain situations.
Prescription drug coverage that is expected to pay, on average, at least as much as standard Medicare drug coverage.
Keeping proof of creditable drug coverage can matter if you enroll in Part D later. A break of 63 days or more without creditable drug coverage can create a Part D late enrollment penalty in some situations.
An amount you pay for covered health care or prescriptions before Medicare, a Medicare plan, or another insurer begins paying its share under the applicable rules.
Medicare has different deductibles for different parts of coverage, and private plan deductibles can vary by plan and year.
A person who qualifies for both Medicare and Medicaid.
The way the programs coordinate depends on the level of Medicaid eligibility, the state, and the coverage arrangement.
A Medicare Advantage Special Needs Plan designed for people who have Medicare and also qualify for Medicaid.
D-SNP structures, networks, benefits, and how closely Medicare and Medicaid are integrated can differ by plan and state.
Certain reusable medical equipment ordered for use in the home, such as wheelchairs, walkers, hospital beds, and some oxygen equipment.
Part B can cover medically necessary DME when Medicare requirements are met. Supplier enrollment and assignment can affect your cost.
Health coverage offered through an employer or union to employees, former employees, or family members.
Whether you can delay Medicare without a penalty depends on the type of coverage, current employment status, employer size, and other facts. Retiree and COBRA coverage are not treated the same as active-employment coverage.
The detailed document a Medicare health or drug plan sends each year explaining what the plan covers, what you pay, and the rules you must follow.
The EOC is one of the most important places to confirm plan-specific details rather than relying on a benefit summary or advertisement.
A request for a Medicare drug plan to cover a drug that is not on its formulary, waive a coverage rule, or in some cases charge a lower cost-sharing amount for a covered drug.
The prescriber generally must provide a supporting statement explaining the medical reason for the request.
A statement from an insurer or Medicare plan showing services or prescriptions processed, what the plan paid, and what you may owe. It is generally not a bill.
People with Original Medicare receive Medicare Summary Notices instead of a Medicare Advantage medical EOB.
A Medicare program that helps people with limited income and resources pay Medicare Part D premiums, deductibles, coinsurance, and other drug costs.
Extra Help is also called the Low-Income Subsidy, or LIS. Eligibility rules and cost-sharing amounts can change by year.
A Medicare drug plan's list of covered prescription drugs.
Formularies can organize drugs into tiers and apply rules such as prior authorization, step therapy, or quantity limits. Drug lists can change under Medicare rules.
The January 1 through March 31 period for enrolling in Medicare Part A and/or Part B when you did not enroll when first eligible and do not qualify for another enrollment opportunity.
Coverage generally starts the first day of the month after you sign up. A late enrollment penalty may apply depending on your circumstances.
A complaint about the quality of care or service, customer service, waiting times, or other issues that are generally not about a coverage or payment decision.
A grievance is different from an appeal. An appeal challenges a coverage or payment decision.
A protection that can require a Medigap insurer to sell you certain policies without using your health history to deny coverage in specific situations.
Guaranteed issue situations have specific timing and eligibility rules. State law may provide additional protections beyond federal rules.
A Medigap protection that generally means the insurer cannot cancel your policy as long as you pay the premium and follow the policy terms.
Premiums can still change under applicable rating and state rules.
California's State Health Insurance Assistance Program, providing free, unbiased Medicare counseling and advocacy.
HICAP is not an insurance company and does not sell Medicare plans.
A type of Medicare Advantage plan that generally requires you to use the plan's network for covered care except for certain situations such as emergencies, urgent care, and out-of-area dialysis.
Many HMOs require a primary care provider and referrals for specialists. Exact rules vary by plan.
Medicare Part A coverage for eligible people who choose comfort-focused care for a terminal illness and meet Medicare hospice requirements.
Hospice coverage has specific certification, election, and care-plan rules. It is not the same as general home health or long-term custodial care.
A doctor, hospital, pharmacy, or other provider that has an arrangement with a health or drug plan to serve its members under that plan's terms.
Using in-network providers can affect whether a service is covered and how much you pay. Network rules vary by plan type.
An additional amount some higher-income Medicare beneficiaries pay with Part B and/or Medicare drug coverage based on modified adjusted gross income and tax filing status.
SSA makes the determination using federal tax information and published income tables. Thresholds and amounts can change each year.
The first enrollment window tied to becoming eligible for Medicare. For many people aging into Medicare, it is a seven-month period surrounding the month they turn 65.
Different timing can apply for people who qualify based on disability or other circumstances. Enrollment timing can affect the coverage effective date.
A hospital status that generally begins when a doctor formally admits you as an inpatient under a hospital order.
Being in a hospital overnight does not automatically mean you are an inpatient. Observation services are generally outpatient services.
A Medicare Advantage Special Needs Plan designed for people who live in certain institutions or require an institutional level of care for a qualifying period.
Eligibility and care-setting requirements are specific to the plan and Medicare rules.
An amount that can be added to certain Medicare premiums when you delay enrollment without qualifying coverage or another applicable exception.
Part B and Part D penalties use different rules and formulas. Some penalties can continue for as long as you have the coverage.
The maximum amount above the Medicare-approved amount that many non-participating Original Medicare providers may charge for certain Part B services.
The federal limiting charge is generally 15% above the Medicare-approved amount for applicable services, but state law can be more protective and the rule does not apply to every item or supplier.
The formal name for Medicare's Extra Help program for Part D prescription drug costs.
See Extra Help for the consumer-friendly name most people encounter.
The annual limit on what you pay out of pocket for covered Part A and Part B services under a Medicare Advantage plan before the plan pays 100% of covered Part A and Part B services for the rest of the year.
The plan-specific MOOP can be lower than the federal maximum. Drug costs generally follow separate Part D out-of-pocket rules.
A joint federal and state health coverage program for people who meet state eligibility rules. In California, Medicaid is called Medi-Cal.
Medicaid eligibility and benefits differ by state. People who have both Medicare and Medicaid are often called dual eligible.
A type of Medicare Advantage plan that combines a high-deductible health plan with a special savings account funded by the plan for qualified health care expenses.
Medicare MSA plans do not include Part D drug coverage. If you want Part D, you generally need a separate Medicare drug plan.
Health care services or supplies needed to diagnose or treat an illness, injury, condition, disease, or symptoms and that meet accepted standards of medicine.
Medical necessity is one part of coverage. Other Medicare or plan rules can also apply.
A Medicare-approved private plan that provides Part A and Part B benefits instead of receiving those benefits through Original Medicare.
Plans must cover Medicare-covered Part A and Part B services, subject to Medicare rules, and may include drug coverage and additional benefits. Networks, authorization rules, and costs vary by plan.
A January 1 through March 31 period for people already in Medicare Advantage to make one permitted change, such as switching to another Medicare Advantage plan or returning to Original Medicare.
If you return to Original Medicare during this period, you can also join a separate Medicare drug plan. This period is not the same as the October 15 through December 7 Annual Enrollment Period.
A Medicare Advantage plan that includes Medicare prescription drug coverage as part of the plan.
Most Medicare Advantage plans include Part D, but not every Medicare Advantage plan type handles drug coverage the same way.
A type of Medicare health plan available only in some areas that works differently from both Original Medicare and Medicare Advantage.
Availability is limited. Enrollment and drug-coverage rules differ from standard Medicare Advantage plans.
Hospital Insurance. Part A helps cover inpatient hospital care, skilled nursing facility care under specific conditions, hospice care, and some home health care.
Part A does not mean every hospital or facility expense is covered. Coverage rules, benefit periods, deductibles, and cost sharing can apply.
Medical Insurance. Part B helps cover doctor and other health care provider services, outpatient care, durable medical equipment, many preventive services, and certain other medical services.
Part B generally has a monthly premium and an annual deductible, with cost sharing for many covered services.
Medicare prescription drug coverage offered through stand-alone Medicare drug plans and Medicare Advantage plans that include drug coverage.
Part D coverage is plan-specific. Formularies, tiers, pharmacy networks, premiums, deductibles, and coverage rules can differ.
Medicare.gov's official online tool for reviewing Medicare Advantage and Medicare drug plans available in a service area.
Plan Finder can compare current plan information, but provider participation, drug details, and plan documents should still be verified when they matter to your decision.
A stand-alone private plan that provides Medicare Part D prescription drug coverage.
A PDP is commonly paired with Original Medicare. Whether it can be paired with a specific Medicare Advantage plan depends on the Medicare Advantage plan type.
A Medicare Part D payment option that lets participating beneficiaries spread certain out-of-pocket prescription drug costs across monthly bills during the calendar year.
The program changes the timing of payments. It does not lower the total covered prescription drug cost by itself. CMS asks consumer communications to use the full name Medicare Prescription Payment Plan rather than M3P, MPPP, or another acronym.
A state-administered program that can help eligible people pay certain Medicare Part A and/or Part B premiums and, depending on the program, other Medicare cost sharing.
There are several Medicare Savings Programs, including QMB, SLMB, QI, and QDWI. Eligibility is determined by the state and rules can differ.
A notice for people with Original Medicare that lists processed Part A and Part B claims, what Medicare paid, and the maximum amount you may owe. It is not a bill.
The MSN also explains appeal information for denied items or services.
Private insurance that works with Original Medicare to help pay some beneficiary cost sharing such as deductibles, coinsurance, and copayments, depending on the standardized plan letter.
Medigap is not Medicare Advantage. You must have Original Medicare to use a Medigap policy.
The payment amount Original Medicare sets for a covered service or item.
When a provider accepts assignment, Medicare pays its share of the approved amount and you pay the applicable beneficiary share.
A one-time six-month federal Medigap enrollment period that begins the first month you are age 65 or older and enrolled in Medicare Part B.
During this period, federal protections limit medical underwriting for Medigap. It is not an annual enrollment period.
For Medicare IRMAA purposes, the income measure Social Security uses to determine whether income-related Part B and Part D adjustments apply.
SSA defines Medicare IRMAA MAGI as adjusted gross income plus tax-exempt interest income, using the tax information available under its rules.
The doctors, hospitals, pharmacies, and other providers that contract with a Medicare health or drug plan under that plan's terms.
Network rules matter most in private Medicare plans. Original Medicare uses different concepts such as Medicare participation and assignment.
An Original Medicare provider who participates in Medicare but has not signed an agreement to accept assignment for all Medicare-covered services.
A non-participating provider may accept assignment case by case and may be allowed to charge more than the Medicare-approved amount for certain services, subject to the limiting charge and state law.
Hospital outpatient status used while the care team determines whether you need inpatient admission or can be discharged.
You can stay in a hospital overnight and still be considered an outpatient. Status can affect Part A billing and eligibility rules for certain post-hospital skilled nursing care.
The federal fee-for-service Medicare program made up of Part A and Part B.
People with Original Medicare can generally use any doctor or hospital that takes Medicare nationwide and may add separate Part D and Medigap coverage.
A provider or facility that is not contracted as part of a private Medicare plan's network.
Whether out-of-network care is covered and what you pay depends on plan type and the situation. Emergency and urgent care have specific protections.
Health care or prescription expenses you pay yourself, such as deductibles, copayments, coinsurance, and certain non-covered services.
A monthly premium is also a personal expense, but plan documents sometimes use out-of-pocket terminology specifically for cost sharing that counts toward a plan limit.
An amount above the Medicare-approved amount that certain Original Medicare providers who do not accept assignment may charge for some Part B services.
Federal limiting-charge rules and state law restrict when and how much can be charged. Some Medigap plans cover Part B excess charges.
A type of Medicare Advantage plan with a provider network that generally allows members to use covered out-of-network providers at a higher cost.
PPOs generally do not require referrals for specialists, but prior authorization and other plan rules can still apply.
The periodic amount you pay to have insurance or Medicare coverage, whether or not you use health care that month.
You may have more than one premium, such as Part B plus a Medigap, Medicare Advantage, or Part D premium, depending on your coverage.
A doctor or other qualified health care professional who provides routine care and often helps coordinate other services.
Some Medicare Advantage plans require members to select a PCP. Original Medicare does not require a designated primary care doctor.
Approval you may need from a Medicare Advantage or drug plan before the plan will cover certain services, supplies, or prescriptions under its rules.
Prior authorization is not the same as a referral. A referral directs you to another provider; prior authorization is a plan coverage approval process.
A type of Medicare Advantage plan that sets its own payment terms for covered care and may or may not have a provider network.
Providers generally must accept the plan's payment terms and agree to treat you. Drug coverage rules depend on the specific PFFS plan.
Program of All-Inclusive Care for the Elderly, a Medicare and Medicaid program in certain areas that provides coordinated medical and long-term services for eligible people who meet program requirements.
PACE has its own eligibility, service-area, and enrollment rules and is not a standard Medicare Advantage plan.
A doctor, other health care professional, facility, or organization that provides health care services or supplies.
Medicare participation, network status, assignment, and plan contracting are separate concepts that can affect access and cost.
A Medicare Savings Program that can help certain eligible working people with disabilities pay the Part A premium.
The state determines eligibility under current program rules.
A Medicare Savings Program that can help eligible people pay the Part B premium.
QI benefits are state-administered and generally require reapplication each year. Current federal and state eligibility rules apply.
A Medicare Savings Program that can help eligible people pay Part A and Part B premiums and Medicare-covered deductibles, coinsurance, and copayments.
Providers are not allowed to bill QMB members for Medicare-covered Part A and Part B cost sharing, although limited Medicaid copayments may apply in some states.
A Part D plan rule that limits how much of a covered drug the plan will cover over a certain period.
You or your prescriber can ask the plan for an exception when the limit is not medically appropriate for your situation.
A direction or authorization from a primary care provider for you to see another provider or specialist, when required by the plan.
Referral requirements are common in many HMOs and less common in PPOs. A referral is different from prior authorization.
Documentation used before certain Medicare marketing appointments to identify the types of Medicare products the beneficiary agreed to discuss.
A Scope of Appointment does not obligate you to enroll, does not automatically enroll you, and does not change your Medicare status.
The geographic area where a Medicare health or drug plan accepts members and provides its plan coverage under its contract.
Moving can change which plans are available and may create a Special Enrollment Period.
A facility that provides skilled nursing or rehabilitation services that require professional personnel.
Medicare SNF coverage is not the same as coverage for long-term custodial nursing home care and has specific eligibility requirements.
An enrollment opportunity outside standard enrollment periods that becomes available when a person meets a specific qualifying circumstance.
There are different SEPs for Part A and Part B and for Medicare Advantage or Part D. The trigger, duration, and permitted actions depend on the exact situation.
A type of Medicare Advantage plan designed for people with certain specific needs, such as having both Medicare and Medicaid, living in an institution, or having a qualifying chronic condition.
SNPs must provide Part D drug coverage. Eligibility and plan structure depend on the SNP type.
A health care professional who focuses on a particular area of medicine or type of care.
Whether you need a referral to see a specialist depends on your coverage and plan rules.
A Medicare Savings Program that can help eligible people pay the Part B premium.
The state determines eligibility using current program rules.
Medicare's quality rating system for Medicare Advantage and Part D plans, generally using a one-to-five-star scale.
Ratings are updated regularly and measure multiple quality and performance areas. A star rating is one factor, not a substitute for checking whether a plan fits your providers, drugs, costs, and needs.
A federally supported state program that provides free, unbiased Medicare counseling and assistance.
In California, SHIP services are provided through HICAP.
A Part D coverage rule that can require you to try a certain drug first before the plan covers another drug for the same condition.
You or your prescriber can request an exception when the required first-step drug is not medically appropriate.
A CMS term used for certain organizations or individuals that perform Medicare Advantage or Part D marketing, lead generation, sales, enrollment, or related functions for plans or plan intermediaries.
CMS rules can require TPMO disclosures and other safeguards. Seeing a TPMO disclosure does not mean the organization represents every plan available in your area.
A cost-sharing level on a Medicare drug plan's formulary. Plans often place covered drugs into different tiers with different copayments or coinsurance.
A lower tier often costs less, but tier structure and pricing differ by plan. Some drugs may be eligible for a tiering exception.
A federal Medigap protection that can apply in certain situations when someone tries Medicare Advantage and returns to Original Medicare within a limited period.
Trial rights are situation-specific and have deadlines. Do not cancel existing coverage until you understand the exact protection and effective dates that apply.
An insurer's process for evaluating an application, which can include health information when the law allows it.
Medigap open enrollment, guaranteed issue rights, and state protections can limit or eliminate medical underwriting in specific situations.
A one-time preventive visit available during the first 12 months you have Medicare Part B.
It is also called the Initial Preventive Physical Examination, or IPPE, and it is different from the Annual Wellness Visit and a routine comprehensive physical.
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October 15 through December 7. Used for certain Medicare Advantage and Part D changes for the next year.
January 1 through March 31 for people already in Medicare Advantage to make one permitted change.
The dates, who can use the period, and what changes are allowed are different.
Official definitions still appear throughout Medicare.gov and in the Medicare & You handbook. Silver Path organizes commonly used terms here so they are easier to search, compare, and connect to the larger Medicare picture.
Your Medicare notice, Evidence of Coverage, Annual Notice of Change, Summary of Benefits, formulary, and other official plan or Medicare documents control the specific coverage rules that apply to you.
Definitions are grounded in current Medicare, CMS, SSA, and California counseling resources. Rules and amounts can change, and plan-specific terms must be confirmed in current plan documents.
Educational reference only: This glossary provides general Medicare education in plain language. It is not a coverage determination, plan document, enrollment decision, legal opinion, tax advice, medical advice, financial plan, or guarantee of benefits. Medicare rules, enrollment rights, federal amounts, state protections, and private plan terms can change. For a specific question, verify the current Medicare notice, plan Evidence of Coverage, Annual Notice of Change, formulary, Summary of Benefits, official Medicare or Social Security guidance, and applicable state rules.
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