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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001140361-10-013372.txt : 20100324
<SEC-HEADER>0001140361-10-013372.hdr.sgml : 20100324
<ACCEPTANCE-DATETIME>20100324120621
ACCESSION NUMBER:		0001140361-10-013372
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
ITEM INFORMATION:		Section 3(c)(7)
FILED AS OF DATE:		20100324
DATE AS OF CHANGE:		20100324
EFFECTIVENESS DATE:		20100324

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PALO ALTO HEALTHCARE FUND II L P
		CENTRAL INDEX KEY:			0001366743
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-91122
		FILM NUMBER:		10701062

	BUSINESS ADDRESS:	
		STREET 1:		470 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		650-325-0772

	MAIL ADDRESS:	
		STREET 1:		470 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001366743</cik>
        <entityName>PALO ALTO HEALTHCARE FUND II L P</entityName>
        <issuerAddress>
            <street1>470 UNIVERSITY AVENUE</street1>
            <city>PALO ALTO</city>
            <stateOrCountry>CA</stateOrCountry>
            <zipCode>94301</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>650-325-0772</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2006</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>N/A</firstName>
                <lastName>Palo Alto Investors, LLC</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>470 University Avenue</street1>
                <city>Palo Alto</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94301</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>L.</middleName>
                <lastName>Edwards</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>470 University Avenue</street1>
                <city>Palo Alto</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94301</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of Palo Alto Investors, LLC, General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Anthony</firstName>
                <middleName>Joon</middleName>
                <lastName>Yun</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>470 University Avenue</street1>
                <city>Palo Alto</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94301</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of Palo Alto Investors, LLC, General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <lastName>Shamia</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>470 University Avenue</street1>
                <city>Palo Alto</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94301</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of Palo Alto Investors, LLC, General Partner</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Hedge Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0000935836-09-000525</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2006-07-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Limited partner interests</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1000000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Citigroup Global Markets Inc.</recipientName>
                <recipientCRDNumber>7059</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>390 - 388 Greenwich Street</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10013</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>Morgan Stanley Smith Barney LLC</recipientName>
                <recipientCRDNumber>149777</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>2000 Westchester Avenue</street1>
                    <city>Purchase</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10577-2530</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>500000000</totalOfferingAmount>
            <totalAmountSold>136014393</totalAmountSold>
            <totalRemaining>363985607</totalRemaining>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>88</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </findersFees>
            <clarificationOfResponse>The issuer does not pay any sales commissions or finders' fees expenses.  The general partner of the issuer pays a portion of the management fees it receives from the issuer to Citigroup World Markets Inc. and Morgan Stanley Smith Barney LLC.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>None, although the general partner of the issuer receives investment management fees and a special profit allocation.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>PALO ALTO HEALTHCARE FUND II L P</issuerName>
                <signatureName>Mark Shamia</signatureName>
                <nameOfSigner>Mark Shamia</nameOfSigner>
                <signatureTitle>Chief Operating Officer of Palo Alto Investors, LLC, GP</signatureTitle>
                <signatureDate>2010-03-24</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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