Definitions & Programs
This page provides plain-language explanations of Medicare, Medicaid, and related programs that commonly cause coordination problems. It is designed as a reference and orientation tool—not as an application guide, phone tree, or plan comparison.
Sections are organized by concept and system role, not alphabetically. Each section is bookmarkable so staff, caregivers, and families can jump directly to the topic that matches the issue they’re trying to understand.
This page does not determine eligibility, enrollment, or benefits. Always verify with the appropriate agency, plan, provider, or pharmacy.
Medicare (Basics)
#medicareMedicare is a federal health insurance program primarily for people age 65+ and certain people under 65 with qualifying disabilities. Medicare coverage is standardized nationally, but how it coordinates with other programs (like Medicaid) is where most confusion happens.
- Part A: hospital coverage (inpatient, skilled nursing facility, hospice)
- Part B: medical coverage (doctor visits, outpatient care, many tests)
- Part D: prescription drug coverage (usually separate unless included in a plan)
- Part C (Medicare Advantage): a private plan alternative that bundles A/B (often D too)
- Member thinks “Medicare covers everything” → unexpected deductibles/copays
- Plan coverage is active, but cost-sharing protections (like QMB) aren’t applied yet
- Drug coverage issues show up at the pharmacy before the plan records look “clean”
Bookmark link: /definitions-programs#medicare
Medicaid (Basics)
#medicaidMedicaid is a jointly funded federal/state program administered by each state. Eligibility can be based on income, assets, disability status, age, and/or functional need. Because states administer Medicaid, program categories and processes vary by state—even though the “big concepts” are similar everywhere.
- “Active Medicaid” does not always mean all benefits are fully applied everywhere
- Renewals/redeterminations can cause sudden interruptions
- Medicaid is typically the payer of last resort when Medicare is also active
- Eligibility decisions happen at the state level
- Medicare premium help and cost-sharing protections may require additional “links” to federal systems
- Plan and pharmacy systems may lag behind eligibility updates
Bookmark link: /definitions-programs#medicaid
Original Medicare + Supplement vs Medicare Advantage (Why It Matters)
#coverage-typesMedicare coverage is delivered in two common ways. Understanding which “structure” a person has helps explain network rules, referrals, prior authorizations, and why billing looks different from one person to the next.
vs
Medicare Advantage (Part C) = Plan manages A/B (often includes Part D)
- Original Medicare is federal Part A (hospital) + Part B (medical).
- A Supplement (Medigap) is optional private coverage that helps pay some Medicare cost-sharing.
- Part D drug coverage is usually separate (standalone drug plan).
- Providers typically bill Medicare first; rules are usually less “network-driven” than Advantage plans.
- A private plan that replaces how Part A and Part B are administered (often includes Part D).
- Usually has network rules and may require referrals depending on plan type.
- Prior authorization is more common for certain services.
- Providers bill the plan; cost-sharing can vary by service and setting.
Bookmark link: /definitions-programs#coverage-types
SSBCI (Special Supplemental Benefits for the Chronically Ill)
#ssbciSSBCI are certain extra benefits that some Medicare Advantage plans may offer to members who meet the plan’s definition of being chronically ill. SSBCI eligibility is not automatic and is not the same as having Medicaid, Extra Help (LIS), or a specific diagnosis list from a doctor’s chart.
- SSBCI is plan-specific: each plan defines which conditions qualify and what documentation is required.
- Plans typically require that the member has one or more qualifying chronic conditions and a documented need related to maintaining health/function.
- Approval may require forms, attestations, or a care-management review depending on the plan.
- Member assumes “I have diabetes/heart disease, so it’s automatic” (often not).
- Member has dual eligibility (Medicaid) and assumes SSBCI is part of Medicaid (it isn’t).
- The benefit exists, but the member hasn’t completed the plan’s eligibility/attestation step yet.
Bookmark link: /definitions-programs#ssbci
D-SNP (Dual Eligible Special Needs Plan)
#dsnpA D-SNP is a type of Medicare Advantage plan designed for people who have Medicare and also qualify for Medicaid (or certain Medicaid-related assistance levels, depending on the plan and state). D-SNPs are built to coordinate Medicare and Medicaid coverage, but many “problems” are really eligibility or timing issues behind the scenes.
(updates may lag between systems)
- Combines Medicare Part A and Part B coverage under a plan (often includes Part D).
- Designed to coordinate cost-sharing when Medicaid or MSP is present.
- May include additional plan benefits, which can depend on eligibility level and plan rules.
- Medicaid eligibility changes (or renewals) can change what the plan can apply.
- MSP/LIS updates may lag across systems, causing temporary billing or pharmacy confusion.
- The plan may require verification of Medicaid status/level to apply certain protections.
Bookmark link: /definitions-programs#dsnp
When Changes Are Allowed (Enrollment Periods, Plain-English)
#enrollment-periodsMedicare plan changes are only allowed during certain windows of time. Most “I want to switch right now” situations come down to whether the person is in an allowed enrollment period or qualifies for a special enrollment reason.
- Annual Election Period (AEP): a yearly window when many people can change Medicare Advantage and Part D plans.
- Medicare Advantage Open Enrollment: a limited window for certain Advantage plan changes (if applicable).
- Special Enrollment Periods (SEP): triggered by specific life events or status changes.
- Moving / change of residence that affects plan service area.
- Loss/gain of other coverage or a coverage change that creates a qualifying event.
- Medicaid or Extra Help (LIS) status changes may create additional change opportunities (rules depend on the situation).
Bookmark link: /definitions-programs#enrollment-periods
Networks, Referrals & Prior Authorization (Why Delays Happen)
#networks-prior-authMany access problems are not “coverage denied” — they are process issues: the provider is out of network, a referral is required, or a service needs prior authorization. These rules are more common in managed care (including many Medicare Advantage and Medicaid managed care plans).
- In-network: Providers who have a contract with the plan.
- Out-of-network: Providers who do not contract with the plan (coverage rules vary).
- Referral: A plan-required step to see a specialist (depends on plan type).
- Prior authorization: Plan approval required before certain services are covered.
- Provider is not in-network (or not in-network for that specific location / tax ID).
- Referral is required but not on file (or was sent to the wrong place).
- Authorization was not requested, is pending, or was submitted incorrectly.
- Service is scheduled before approval is issued or before the effective date.
Bookmark link: /definitions-programs#networks-prior-auth
Prescription Drug Coverage (Why the Pharmacy Sees It First)
#rx-coveragePrescription drug issues often appear at the pharmacy before plan records look correct. That’s because the pharmacy system processes coverage in real time, including formulary rules, prior authorization requirements, and Extra Help (LIS) subsidy status.
- Formulary: the plan’s covered drug list.
- Tiering: a pricing level that can affect copays.
- Prior authorization: plan approval required before a drug is covered.
- Step therapy: requires trying preferred drugs first (if applicable).
- “Not covered” (drug not on formulary or wrong strength/quantity limit).
- “Needs prior auth” (doctor must submit paperwork before coverage applies).
- Copay is unexpectedly high because LIS/subsidy isn’t applied yet or has changed.
Bookmark link: /definitions-programs#rx-coverage
Medicare Savings Programs (MSP: QMB / SLMB / QI)
#mspMSP is a Medicaid program (run by the state) that helps pay certain Medicare costs for people with limited income/resources. MSP is one of the biggest sources of real-world billing confusion because the protections have to be applied correctly across providers, Medicare, and plan systems.
- QMB: strongest protections; limits what providers can bill the member for Medicare-covered services
- SLMB: typically helps with Part B premium (and related MSP status)
- QI: similar goal to SLMB; funding/approval rules vary
- QDWI: more specialized; less common
- Member gets billed for Medicare-covered services despite QMB
- Part B premium is being withheld when state is supposed to pay it
- Eligibility shows active at the state, but Medicare/plan systems don’t reflect it yet
Bookmark link: /definitions-programs#msp
Extra Help (LIS) — Part D Prescription Assistance
#lisExtra Help (also called LIS, Low-Income Subsidy) is a federal program that reduces Part D prescription drug costs. It is separate from MSP. In day-to-day reality, LIS problems often show up at the pharmacy counter first.
- Lower prescription copays
- Reduced or eliminated Part D deductible (varies)
- Limits the impact of the coverage gap (varies)
- Member is charged “full price” unexpectedly
- LIS level changes mid-year → copay changes
- Plan record looks active, but the subsidy isn’t recognized yet at point-of-sale
Bookmark link: /definitions-programs#lis
HCBS (Home & Community-Based Services)
#hcbsHCBS are Medicaid-funded, person-centered services designed to help people live in their home/community instead of in an institution. HCBS is not “insurance benefits” in the usual sense—HCBS is typically coordinated through state systems, case managers, and service providers.
- Active Medicaid (or Medicaid pathway)
- Functional/cognitive need (assessment-based)
- Meets “level of care” criteria (varies by state/program)
- Approved in concept, but no provider/case manager assigned yet
- Service plan exists, but staffing/provider capacity delays start
- Reassessment needed after hospitalization or change in condition
Bookmark link: /definitions-programs#hcbs
Medicaid Waivers (Program Architecture, Not a Benefits List)
#waiversA Medicaid waiver allows a state to “waive” certain standard Medicaid rules so it can offer targeted services to specific populations—often to support people in the community instead of in institutions. Waivers define how services are authorized and delivered, not a guarantee that services will start immediately.
- Most common waiver structure.
- Tied to meeting an institutional “level of care.”
- Often subject to enrollment caps and waiting lists.
- Services require assessment, service planning, and provider availability.
- HCBS-like services offered through the state plan.
- May use different eligibility criteria than 1915(c).
- Generally not tied to institutional level-of-care.
- Still requires assessment and service authorization.
- Focuses on attendant services and supports.
- Designed to help individuals live independently in the community.
- Structure and scope vary by state.
- Not all states offer this option.
Bookmark link: /definitions-programs#waivers
Miller Trust (Income Trust / Qualified Income Trust)
#miller-trustA Miller Trust (often called a Qualified Income Trust) is a legal/financial arrangement used in some states when a person’s income is above the Medicaid long-term care income limit. It is designed to help meet eligibility rules for certain Medicaid long-term care programs.
- Can help meet income rules for certain Medicaid LTC pathways (state-specific)
- Does not eliminate spend-down rules, paperwork, or ongoing eligibility requirements
- Usually requires correct setup + correct ongoing deposits/timing
- Deposits go to the wrong account or wrong amount
- Deposits happen late (timing can matter)
- Trust paperwork/bank titling is incomplete or not accepted by the state
Bookmark link: /definitions-programs#miller-trust
Managed Care vs Fee-for-Service (FFS) Medicaid
#managed-careStates may deliver Medicaid through Fee-for-Service (FFS) or through Managed Care (where a contracted health plan administers benefits). This is a common source of “we don’t see it yet” issues because eligibility can be active even while plan enrollment or benefit routing is still updating.
- State Medicaid program pays providers directly under state rules
- Coverage routing can be simpler, but processes still vary by state
- A contracted plan administers Medicaid benefits and provider network rules
- Enrollment files + effective dates + plan systems can create timing delays
Bookmark link: /definitions-programs#managed-care
PACE (Program of All-Inclusive Care for the Elderly)
#pacePACE is a highly integrated care program for individuals with significant medical and functional needs. It combines medical care, long-term services, social supports, and care coordination into a single delivery system. PACE is not a typical Medicare Advantage plan—it effectively replaces how Medicare (and Medicaid, if present) services are provided.
- Provides comprehensive medical care, therapies, medications, and long-term supports.
- Uses an interdisciplinary care team (physicians, nurses, social workers, therapists).
- Often centers care around a PACE facility, with transportation included.
- Coordinates nearly all aspects of care through one organization.
- Usually age 55+ (exact age rules vary by program).
- Meets a nursing-facility level of care.
- Can live safely in the community with supports.
- Often (but not always) eligible for both Medicare and Medicaid.
Bookmark link: /definitions-programs#pace
Short-Term vs Long-Term Care (Plain-English)
#short-vs-long-term-care“Care in a facility” can mean two very different things. Most billing confusion happens because people assume Medicare pays for long-term care the same way it can pay for short-term rehab after a hospitalization.
Long-term = custodial + ongoing (help with daily living / supervision)
- Usually follows a medical event (e.g., hospitalization, surgery, serious illness).
- Focus is recovery: therapy, nursing, wound care, IV meds, skilled monitoring.
- Often time-limited and dependent on meeting “medical necessity” criteria.
- Coverage rules depend on the person’s Medicare structure (Original Medicare vs Medicare Advantage) and plan requirements.
- Ongoing help with activities of daily living (bathing, dressing, toileting, eating, supervision).
- Can be provided in a nursing facility or in the community (through HCBS in many states).
- Typically not covered by Medicare as an ongoing “room and board” benefit.
- In many cases, long-term care coverage is tied to Medicaid eligibility rules and state programs.
Bookmark link: /definitions-programs#short-vs-long-term-care
Appeals vs Grievances (What’s the Difference?)
#appeals-grievancesAppeals and grievances are often confused, but they address different problems. Knowing which process applies can save significant time and frustration.
- Challenges a coverage or payment decision
- Used when something is denied, reduced, or stopped
- Has formal deadlines and review steps
- Complains about service or experience
- Used for delays, communication, or behavior issues
- Does not usually change coverage decisions
Care & Case Management (What They Actually Do)
#care-managementCare or case management refers to coordination services that help individuals navigate complex medical and social needs. These roles support care—they do not replace eligibility rules or plan coverage requirements.
- Helps coordinate providers, services, and follow-up
- May assist with referrals, authorizations, and transitions of care
- Cannot override plan rules, Medicaid eligibility, or provider contracts
Common Misconceptions (Quick Fixes)
#misconceptions- “Medicaid covers everything.” Not always—benefits vary by state and by eligibility category.
- “SSA handles Medicaid.” Medicaid is state-run; SSA is involved mainly with Medicare and certain federal processes.
- “My plan decides Extra Help (LIS).” LIS is a federal subsidy; plans apply it but do not “grant” it.
- “If it’s active, it’s applied everywhere.” Eligibility, MSP, LIS, and plan/pharmacy systems may update on different timelines.
- “Waiver approved means services start immediately.” Approval can come before staffing/provider assignment and scheduling.
Bookmark link: /definitions-programs#misconceptions
Coordination of Benefits (Who Pays First)
#cobCoordination of Benefits (COB) determines which insurance or program pays first when someone has more than one source of coverage. Incorrect COB information is a common cause of denied or delayed claims.
- One payer is primary; others may pay secondary
- Medicare, Medicaid, employer plans, and others have defined roles
- Out-of-date COB records can cause claims to reject
Income & Assets (Eligibility vs Coverage)
#income-assetsIncome and asset rules primarily affect eligibility, not how coverage works once someone is enrolled. Confusion often arises when eligibility concepts are applied to insurance benefits.
- Different programs use different income and asset rules
- Eligibility rules do not change how Medicare benefits are structured
- Changes in income or assets can affect assistance programs mid-year
Professional Disclaimer
#disclaimerThis page is provided for general educational and operational reference. It is not legal advice, not an eligibility determination, and not a promise of coverage or benefits. Program rules and processes vary by state and by individual circumstances. Always verify current eligibility, effective dates, cost-sharing protections, and drug coverage with the appropriate agency (state Medicaid office, Social Security/Medicare) and/or the member’s health plan and pharmacy.
Bookmark link: /definitions-programs#disclaimer
