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S. S2 Sa Sb Sc Sd Se Sf Sg Sh Si Sj Sk Sl Sm Sn So Sp Sq Sr Ss St Su Sv Sw Sy

SN

HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating third surgical opinion.

Snowfall cover

Weather derivative based on expected level of snowfall in a given location over a specific time. Snowfall above the reference level may impose additional costs on snow-clearing local authorities, who hedge the risk with a call option. Levels below the reference point reduce revenues at the ski resort, which hedges with a put option. The former receives a payout at high levels of snow, the latter at low levels. See PRECIPITATION COVER; SUNSHINE COVER.