<?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>0001289409</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001350653</issuerCik>
            <issuerName>ALPHATEC HOLDINGS INC</issuerName>
            <secFileNumber>000-52024</secFileNumber>
            <issuerAddress>
                <ns2:street1>1950 Camino Vida Roble</ns2:street1>
                <ns2:city>Carlsbad</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>92008</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>760-431-9286</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>PATRICK MILES</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
                <relationshipToIssuer>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>100000</noOfUnitsSold>
            <aggregateMarketValue>1157000.00</aggregateMarketValue>
            <noOfUnitsOutstanding>141767870</noOfUnitsOutstanding>
            <approxSaleDate>01/21/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/24/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>100000</amountOfSecuritiesAcquired>
            <paymentDate>02/24/2023</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for PATRICK MILES</name>
                <address>
                    <ns2:street1>1950 Camino Vida Roble</ns2:street1>
                    <ns2:city>Carlsbad</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92008</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/21/2024</saleDate>
            <amountOfSecuritiesSold>50000</amountOfSecuritiesSold>
            <grossProceeds>504335.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for PATRICK MILES</name>
                <address>
                    <ns2:street1>1950 Camino Vida Roble</ns2:street1>
                    <ns2:city>Carlsbad</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92008</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/20/2024</saleDate>
            <amountOfSecuritiesSold>50000</amountOfSecuritiesSold>
            <grossProceeds>501350.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>The securities to be sold were acquired upon the vesting of restricted stock units during the period of 02/24/2023 through 04/22/2023.
</remarks>
        <noticeSignature>
            <noticeDate>01/21/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>06/13/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Patrick Miles</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001289409
XXXXXXXX
LIVE
0001350653
ALPHATEC HOLDINGS INC
000-52024
1950 Camino Vida Roble
Carlsbad
CA
92008
760-431-9286
PATRICK MILES
Director
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
100000
1157000.00
141767870
01/21/2025
NASDAQ
Common
02/24/2023
Restricted Stock Units
Issuer
N
100000
02/24/2023
N/A
N
10b5-1 Sales for PATRICK MILES
1950 Camino Vida Roble
Carlsbad
CA
92008
Common
11/21/2024
50000
504335.00
10b5-1 Sales for PATRICK MILES
1950 Camino Vida Roble
Carlsbad
CA
92008
Common
11/20/2024
50000
501350.00
The securities to be sold were acquired upon the vesting of restricted stock units during the period of 02/24/2023 through 04/22/2023.
01/21/2025
06/13/2024
/s/ Patrick Miles