A massage chair or cushion designed for general relaxation rather than medical mechano-therapy can be a borderline classification. Purpose-built mechano-therapy and massage apparatus intended for therapeutic use fall under 901910, but consumer furniture with massage functions may classify under the furniture heading. The product's design, marketing, and any medical claims are key factors; a binding ruling is advisable for high-volume imports.

CPAP and BiPAP devices used for sleep-disordered breathing treatment are generally classified under heading 9019 (901920) as artificial respiration apparatus. They are also regulated as Class II medical devices by FDA, requiring 510(k) clearance. Importers should confirm the specific tariff line with their customs broker, as some configurations may be reviewed under adjacent headings.