PlumBot: Bot: Creating new article from JSON

2026-03-14T16:12:49Z

Bot: Creating new article from JSON

New page

🛡️ '''Medicare Supplement insurance''' — commonly known as [[Definition:Medigap insurance | Medigap]] — is a type of private [[Definition:Health insurance | health insurance]] sold in the United States that covers out-of-pocket costs not paid by Original Medicare (Parts A and B), such as [[Definition:Deductible | deductibles]], [[Definition:Copayment | copayments]], and [[Definition:Coinsurance | coinsurance]]. These policies are standardized by federal regulation into lettered plan types (A through N, with certain legacy plans grandfathered), meaning the benefits within each plan letter are identical regardless of which insurer sells them — competition occurs on price, brand reputation, and service quality rather than benefit design. Medicare Supplement insurance is distinct from [[Definition:Medicare Advantage | Medicare Advantage]] plans, which replace Original Medicare entirely with a managed care alternative.

⚙️ Carriers offering Medicare Supplement policies underwrite them under rules that vary by state and enrollment period. During a beneficiary's initial open enrollment window — typically the six-month period beginning when they turn 65 and enroll in Medicare Part B — federal law guarantees issue on a [[Definition:Guaranteed issue | guaranteed-issue]] basis, meaning insurers cannot deny coverage or charge higher [[Definition:Premium | premiums]] based on health status. Outside this window, most states permit [[Definition:Medical underwriting | medical underwriting]], allowing carriers to decline applicants or rate them based on health conditions. Insurers price these products using one of three rating methodologies: community-rated (same premium for all ages), issue-age-rated (premium based on age at purchase), or attained-age-rated (premium increases as the policyholder ages). The choice of methodology significantly affects [[Definition:Loss ratio | loss ratio]] trajectory and [[Definition:Policyholder | policyholder]] persistency over time, and carriers must file rates with state [[Definition:Department of insurance | departments of insurance]] for approval.

📊 The Medicare Supplement market represents a large and strategically important segment of the U.S. individual health insurance landscape, anchored by a growing population of aging baby boomers. For carriers, it offers relatively predictable [[Definition:Claims experience | claims experience]] because the underlying coverage is standardized, but competition on price is intense and [[Definition:Member retention | member retention]] becomes the primary driver of profitability — policyholders who lapse early tend to be healthier, leaving the remaining pool more expensive to insure. Regulatory oversight from both CMS and state insurance regulators imposes [[Definition:Medical loss ratio (MLR) | minimum loss ratio]] requirements, typically 65% for individual policies and 75% for group policies. The market also serves as a bellwether for broader trends in senior health coverage, particularly as shifts in [[Definition:Medicare Advantage | Medicare Advantage]] enrollment patterns and federal policy changes alter the competitive dynamics between supplement and replacement plan models.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Medigap insurance]]
* [[Definition:Medicare Advantage]]
* [[Definition:Health insurance]]
* [[Definition:Guaranteed issue]]
* [[Definition:Medical underwriting]]
* [[Definition:Medical loss ratio (MLR)]]
{{Div col end}}

Definition:Medicare Supplement insurance - Revision history

PlumBot: Bot: Creating new article from JSON