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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:01a0a185-e03a-7aef-9c80-a7f0396960b3,g:16b0cfec-8160-4a85-9c53-5bb4bd202f4b-->
<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.dexcom.com/role/CoverPage" xlink:type="simple" xlink:href="dxcm-20260910.xsd#CoverPage"/>
  <link:presentationLink xlink:role="http://www.dexcom.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_01a0a185-e03a-7932-857a-a0908d673a52" 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_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_DocumentType_01a0a185-e03a-7932-857a-a0908d673a52" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_01a0a185-e03a-72b3-b22f-72c885d96ab9" 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_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_DocumentPeriodEndDate_01a0a185-e03a-72b3-b22f-72c885d96ab9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_01a0a185-e03a-7ce6-9213-f3d540f28e10" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_AmendmentFlag_01a0a185-e03a-7ce6-9213-f3d540f28e10" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_01a0a185-e03a-733f-a01b-8f4c3f3bd08d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityCentralIndexKey_01a0a185-e03a-733f-a01b-8f4c3f3bd08d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_01a0a185-e03a-7efa-9b25-9bb06b307b35" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_01a0a185-e03a-7c20-b01a-3a9ad9d5a28a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityRegistrantName_01a0a185-e03a-7c20-b01a-3a9ad9d5a28a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_01a0a185-e03a-711c-abcd-2eb7bdaf0686" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityIncorporationStateCountryCode_01a0a185-e03a-711c-abcd-2eb7bdaf0686" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_01a0a185-e03a-7cc6-8eb6-56ccd66b861a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityFileNumber_01a0a185-e03a-7cc6-8eb6-56ccd66b861a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_01a0a185-e03a-73d6-8f8f-e416d57bbae2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityTaxIdentificationNumber_01a0a185-e03a-73d6-8f8f-e416d57bbae2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_01a0a185-e03a-70ba-bf74-c8e2465a21a2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityAddressAddressLine1_01a0a185-e03a-70ba-bf74-c8e2465a21a2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_01a0a185-e03a-7ec8-a3b5-49922883b060" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityAddressCityOrTown_01a0a185-e03a-7ec8-a3b5-49922883b060" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_01a0a185-e03a-7208-9d6e-32f3ce932a05" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityAddressStateOrProvince_01a0a185-e03a-7208-9d6e-32f3ce932a05" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_01a0a185-e03a-7f7b-a76f-0795ff16e83d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityAddressPostalZipCode_01a0a185-e03a-7f7b-a76f-0795ff16e83d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_01a0a185-e03a-7585-8cbf-c71b72f6b87d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_CityAreaCode_01a0a185-e03a-7585-8cbf-c71b72f6b87d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_01a0a185-e03a-72f9-946b-ef2d5e3da7b9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_LocalPhoneNumber_01a0a185-e03a-72f9-946b-ef2d5e3da7b9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_01a0a185-e03a-76a6-86ba-7c34fea8ab11" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_WrittenCommunications_01a0a185-e03a-76a6-86ba-7c34fea8ab11" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_01a0a185-e03a-753b-9768-d94309b45b48" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_SolicitingMaterial_01a0a185-e03a-753b-9768-d94309b45b48" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_01a0a185-e03a-7768-97fb-4e65cf999fdf" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_PreCommencementTenderOffer_01a0a185-e03a-7768-97fb-4e65cf999fdf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_01a0a185-e03a-7138-930b-fd0aa6762faf" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_01a0a185-e03a-7138-930b-fd0aa6762faf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_01a0a185-e03a-7179-86af-e30a04369d10" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_Security12bTitle_01a0a185-e03a-7179-86af-e30a04369d10" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_01a0a185-e03a-7cf4-a906-9234fd9b30b4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_TradingSymbol_01a0a185-e03a-7cf4-a906-9234fd9b30b4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_01a0a185-e03a-7f32-9919-7f9b19cdf1ce" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_SecurityExchangeName_01a0a185-e03a-7f32-9919-7f9b19cdf1ce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_01a0a185-e03a-72ec-9e06-75bbf48509fd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_01a0a185-e03a-7371-b256-ad9978be53f7" xlink:to="loc_dei_EntityEmergingGrowthCompany_01a0a185-e03a-72ec-9e06-75bbf48509fd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
