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  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ecd="http://xbrl.sec.gov/ecd/2025"
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        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001835022</identifier>
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        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
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    <dei:DocumentType contextRef="P01_01_2025To12_31_2025" id="hidden165280478">DEF 14A</dei:DocumentType>
    <dei:AmendmentFlag contextRef="P01_01_2025To12_31_2025" id="ixv-3829">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="P01_01_2025To12_31_2025" id="ixv-3830">0001835022</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="P01_01_2025To12_31_2025" id="ixv-3840">COYA THERAPEUTICS, INC.</dei:EntityRegistrantName>
    <ecd:InsiderTrdPoliciesProcAdoptedFlag contextRef="P01_01_2025To12_31_2025" id="ixv-3844">true</ecd:InsiderTrdPoliciesProcAdoptedFlag>
    <ecd:AwardTmgMnpiDiscTextBlock contextRef="P01_01_2025To12_31_2025" id="ixv-3115">&lt;div style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold"&gt;The Company&#x2019;s Policies and Practices Related to the Grant of Certain Equity Awards Close in Time to the Release of Material Nonpublic Information &lt;/div&gt;&lt;div style="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"&gt;We do not have any formal policy that requires us to grant, or avoid granting, equity-based compensation to our executive officers at certain times. Consistent with our annual compensation cycle, the Compensation Committee has for several years granted annual equity awards to our executive officers and directors at the start of the new fiscal year. &lt;/div&gt;&lt;div style="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"&gt;The timing of any equity grants to executive officers in connection with new hires, promotions, or other &lt;div style="white-space:nowrap;display:inline;"&gt;non-routine&lt;/div&gt; grants is tied to the event giving rise to the award (such as an executive officer&#x2019;s commencement of employment or promotion effective date). As a result, in all cases, the timing of grants of equity awards, including stock options, occurs independent of the release of any material nonpublic information, and we do not time the disclosure of material nonpublic information for the purpose of affecting the value of equity-based compensation. &lt;/div&gt;&lt;div style="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"&gt;No stock options were issued to executive officers in fiscal year 2025 during any period beginning four business days before the filing of a periodic report or current report disclosing material &lt;div style="white-space:nowrap;display:inline;"&gt;non-public&lt;/div&gt; information and ending one business day after the filing or furnishing of such report with the SEC. &lt;/div&gt;&lt;div style="margin-top:0pt;margin-bottom:0pt ; font-size:8pt"&gt;&#160;&lt;/div&gt;</ecd:AwardTmgMnpiDiscTextBlock>
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    <ecd:AwardTmgMethodTextBlock contextRef="P01_01_2025To12_31_2025" id="ixv-3119">The timing of any equity grants to executive officers in connection with new hires, promotions, or other &lt;div style="white-space:nowrap;display:inline;"&gt;non-routine&lt;/div&gt; grants is tied to the event giving rise to the award (such as an executive officer&#x2019;s commencement of employment or promotion effective date). As a result, in all cases, the timing of grants of equity awards, including stock options, occurs independent of the release of any material nonpublic information, and we do not time the disclosure of material nonpublic information for the purpose of affecting the value of equity-based compensation.</ecd:AwardTmgMethodTextBlock>
    <ecd:AwardTmgHowMnpiCnsdrdTextBlock contextRef="P01_01_2025To12_31_2025" id="ixv-3120">The timing of any equity grants to executive officers in connection with new hires, promotions, or other &lt;div style="white-space:nowrap;display:inline;"&gt;non-routine&lt;/div&gt; grants is tied to the event giving rise to the award (such as an executive officer&#x2019;s commencement of employment or promotion effective date). As a result, in all cases, the timing of grants of equity awards, including stock options, occurs independent of the release of any material nonpublic information, and we do not time the disclosure of material nonpublic information for the purpose of affecting the value of equity-based compensation.</ecd:AwardTmgHowMnpiCnsdrdTextBlock>
    <ecd:MnpiDiscTimedForCompValFlag contextRef="P01_01_2025To12_31_2025" id="ixv-3849">false</ecd:MnpiDiscTimedForCompValFlag>
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