<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e6fd3-6701-7052-aeb7-6220fa8033ef,g:aa418e71-58a2-4f72-83bb-d8447a4f077c-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.hioscar.com/role/CoverPage" xlink:type="simple" xlink:href="oscr-20260529.xsd#CoverPage"/>
  <link:presentationLink xlink:role="http://www.hioscar.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e6fd3-6701-7fab-a8ae-fb7393eebea9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_DocumentType_019e6fd3-6701-7fab-a8ae-fb7393eebea9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e6fd3-6701-7738-b6f5-7f6b421e1c19" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_DocumentPeriodEndDate_019e6fd3-6701-7738-b6f5-7f6b421e1c19" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e6fd3-6701-7f98-aaf9-783f5267bd3f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityRegistrantName_019e6fd3-6701-7f98-aaf9-783f5267bd3f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e6fd3-6701-72b1-8590-dfb968c8b436" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e6fd3-6701-72b1-8590-dfb968c8b436" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e6fd3-6701-7b9b-881a-cd08d9834f05" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityFileNumber_019e6fd3-6701-7b9b-881a-cd08d9834f05" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e6fd3-6701-72d5-93c9-91697ac93ee6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e6fd3-6701-72d5-93c9-91697ac93ee6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e6fd3-6701-73df-a3cb-598c8f426312" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityAddressAddressLine1_019e6fd3-6701-73df-a3cb-598c8f426312" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e6fd3-6701-7b72-8304-c34e3ed92dc6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityAddressCityOrTown_019e6fd3-6701-7b72-8304-c34e3ed92dc6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e6fd3-6701-7381-9dc2-5a6c118d3aeb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityAddressStateOrProvince_019e6fd3-6701-7381-9dc2-5a6c118d3aeb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e6fd3-6701-7081-8466-ee77806f6f14" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityAddressPostalZipCode_019e6fd3-6701-7081-8466-ee77806f6f14" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e6fd3-6701-7f0d-a142-b13001cff21f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_CityAreaCode_019e6fd3-6701-7f0d-a142-b13001cff21f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e6fd3-6701-709e-892f-325418d3860e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_LocalPhoneNumber_019e6fd3-6701-709e-892f-325418d3860e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019e6fd3-6701-7305-b4ff-70719363c287" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_WrittenCommunications_019e6fd3-6701-7305-b4ff-70719363c287" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019e6fd3-6701-7a19-a326-61cb43f2847a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_SolicitingMaterial_019e6fd3-6701-7a19-a326-61cb43f2847a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019e6fd3-6701-71f6-b3da-0afcd8bd2e22" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_PreCommencementTenderOffer_019e6fd3-6701-71f6-b3da-0afcd8bd2e22" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019e6fd3-6701-7abf-8113-562c9a374cce" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019e6fd3-6701-7abf-8113-562c9a374cce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e6fd3-6701-7ed8-819c-a724ade5f035" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_Security12bTitle_019e6fd3-6701-7ed8-819c-a724ade5f035" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e6fd3-6701-701c-99f1-ff1906f913e3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_TradingSymbol_019e6fd3-6701-701c-99f1-ff1906f913e3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e6fd3-6701-7acb-90d5-d25e7a91fb00" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_SecurityExchangeName_019e6fd3-6701-7acb-90d5-d25e7a91fb00" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e6fd3-6701-7d67-8857-5ea390063993" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e6fd3-6701-7d67-8857-5ea390063993" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e6fd3-6701-775b-9159-baf00848f76b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_EntityCentralIndexKey_019e6fd3-6701-775b-9159-baf00848f76b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e6fd3-6701-7e58-b6b9-30c68ee203f8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e6fd3-6701-7434-94a0-597907b31a47" xlink:to="loc_dei_AmendmentFlag_019e6fd3-6701-7e58-b6b9-30c68ee203f8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
