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🏥 '''Medical history disregarded (MHD)''' is an [[Definition:Underwriting | underwriting]] approach used in certain [[Definition:Life insurance | life]] and [[Definition:Health insurance | health insurance]] products where the insurer elects not to consider an applicant's past medical conditions when assessing eligibility or determining [[Definition:Premium | premium]] rates. Unlike standard individually underwritten policies, where [[Definition:Medical underwriting | medical underwriting]] involves detailed health questionnaires, attending physician statements, or laboratory testing, MHD terms extend coverage without scrutinizing prior diagnoses, treatments, or pre-existing conditions. The concept is most prominent in [[Definition:Group insurance | group insurance]] — particularly employer-sponsored group life and income protection schemes — where the risk pool is large enough that the insurer can absorb adverse selection through pooling and [[Definition:Experience rating | experience rating]] rather than individual selection.

⚙️ Under an MHD arrangement, the insurer typically sets a threshold — often expressed as a monetary amount of [[Definition:Sum insured | sum insured]] or a multiple of salary — below which all eligible group members receive automatic coverage regardless of health status. Above that threshold, standard [[Definition:Medical underwriting | medical underwriting]] applies. For example, in a UK group life scheme, an insurer might offer MHD cover up to £500,000 or four times salary, whichever is lower, with individual evidence of health required for amounts exceeding the MHD limit. The threshold itself is calibrated based on the group's size, demographics, industry, and claims experience; larger, healthier groups command higher MHD limits because the statistical predictability of the pool gives the insurer confidence. Renewal negotiations frequently revisit MHD limits, especially if [[Definition:Loss ratio | loss experience]] deteriorates. In markets such as Australia, group insurers within [[Definition:Superannuation | superannuation funds]] have historically applied MHD-style automatic acceptance terms, though regulatory reforms have pushed for greater scrutiny of the sustainability of such arrangements.

💡 MHD provisions carry significant practical weight for both employers and employees. They ensure that workers with chronic conditions or complex medical histories can access meaningful insurance protection without facing exclusions, [[Definition:Loading | premium loadings]], or outright decline — outcomes that would be common in the individual market. This inclusivity supports workforce well-being strategies and helps employers attract and retain talent. For insurers, however, offering generous MHD terms is a calculated trade-off: it drives participation and simplifies administration but concentrates anti-selection risk if the group is too small or the limits too high. [[Definition:Reinsurance | Reinsurers]] underwriting group life treaties pay close attention to MHD thresholds and may impose their own caps on automatic acceptance within [[Definition:Treaty reinsurance | treaty]] terms. The concept underscores a broader principle in insurance — that group dynamics and pooling can substitute for individual risk selection, but only within carefully managed boundaries.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Medical underwriting]]
* [[Definition:Pre-existing condition]]
* [[Definition:Group life insurance]]
* [[Definition:Guaranteed issue]]
* [[Definition:Experience rating]]
* [[Definition:Anti-selection]]
{{Div col end}}

Definition:Medical history disregarded (MHD) - Revision history

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