<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001864233</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001845257</issuerCik>
            <issuerName>LIFESTANCE HEALTH GROUP, INC.</issuerName>
            <secFileNumber>001-40478</secFileNumber>
            <issuerAddress>
                <ns2:street1>4800 N. Scottsdale Road</ns2:street1>
                <ns2:street2>Suite 6000</ns2:street2>
                <ns2:city>Scottsdale</ns2:city>
                <ns2:stateOrCountry>AZ</ns2:stateOrCountry>
                <ns2:zipCode>85251</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>602-767-2100</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>KEVIN M MULLINS</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Former officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>1400000</noOfUnitsSold>
            <aggregateMarketValue>8041600.00</aggregateMarketValue>
            <noOfUnitsOutstanding>382622704</noOfUnitsOutstanding>
            <approxSaleDate>08/21/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/01/2017</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1400000</amountOfSecuritiesAcquired>
            <paymentDate>06/01/2017</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>Kevin Mullins</name>
                <address>
                    <ns2:street1>4800 N. Scottsdale Road</ns2:street1>
                    <ns2:street2>Suite 6000</ns2:street2>
                    <ns2:city>Scottsdale</ns2:city>
                    <ns2:stateOrCountry>AZ</ns2:stateOrCountry>
                    <ns2:zipCode>85251</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>common</securitiesClassTitle>
            <saleDate>08/08/2024</saleDate>
            <amountOfSecuritiesSold>211713</amountOfSecuritiesSold>
            <grossProceeds>1273729.73</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>08/21/2024</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ Kevin M Mullins</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001864233
XXXXXXXX
LIVE
0001845257
LIFESTANCE HEALTH GROUP, INC.
001-40478
4800 N. Scottsdale Road
Suite 6000
Scottsdale
AZ
85251
602-767-2100
KEVIN M MULLINS
Former officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
1400000
8041600.00
382622704
08/21/2024
NASDAQ
Common
06/01/2017
Restricted stock vesting under a registered plan
issuer
N
1400000
06/01/2017
Services Rendered
N
Kevin Mullins
4800 N. Scottsdale Road
Suite 6000
Scottsdale
AZ
85251
common
08/08/2024
211713
1273729.73
08/21/2024
/s/ Kevin M Mullins