SECTION5. MARKETSHARESOFHEALTHPLANS Section5 MarketSharesofHealthPlans ThelargestshareofcoveredworkersisenrolledinPPOs,covering48%ofcoveredworkers,followedbyHDHP/SOs,HMOs, POSplans,andconventionalplans. Enrollmentdistributionvariesbyfirmsize: HDHP/SOshavearelativelyhighershare of enrollmentamonglargefirms(200ormoreworkers)thansmallfirms(3-199workers)(30%vs.23%),andPOSplansare relatively more popular amongsmallfirmsthanlargefirms(18%vs.6%). • Forty-eightpercentofcoveredworkersareenrolledinPPOs,followedbyHDHP/SOs(28%),HMOs(14%),POSplans (10%),andconventionalplans(<1%)[Figure5.1]. • ThepercentageofcoveredworkersenrolledinHDHP/SOsissimilartolastyear. • AlargershareofcoveredworkersareenrolledinHDHP/SOsthaninHMOsinbothsmallfirmsandlargefirms. • Planenrollmentpatternsvarybyfirmsize. – CoveredworkersinlargefirmsaremorelikelythancoveredworkersinsmallfirmstoenrollinHDHP/SOs(30% vs. 23%). CoveredworkersinsmallfirmsaremorelikelythancoveredworkersinlargefirmstoenrollinPOSplans (18%vs.6%)[Figure5.2]. • Planenrollmentpatternsalsodifferacrossregions. – HMOenrollmentissignificantlyhigherintheWest(29%)andsignificantlylowerintheSouth(10%)andMidwest (8%)[Figure5.3]. – CoveredworkersintheSouth(54%)aremorelikelytobeenrolledinPPOsthanworkersinotherregions,while coveredworkersintheWest(39%)arelesslikelytobeenrolledinaPPO[Figure5.3]. – CoveredworkersintheMidwest(36%)aremorelikelytobeenrolledinHDHP/SOsthanworkersinotherregions, whilecoveredworkersintheSouth(23%)arelesslikelytobeenrolledinHDHP/SOs[Figure5.3]. The Kaiser Family Foundation and Health Research & Educational Trust / Page 71