-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 PISIdVSp02OoAGWLcT3PJNxvqqDJMmDb1ipEIqi6ItmE4isRvIXsipHxFMUMXvXp
 3fWq8JEyaY1qhWcW2ArClQ==

<SEC-DOCUMENT>0000873591-03-000032.txt : 20030812
<SEC-HEADER>0000873591-03-000032.hdr.sgml : 20030812
<ACCEPTANCE-DATETIME>20030812153206
ACCESSION NUMBER:		0000873591-03-000032
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030812
FILED AS OF DATE:		20030812

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WYATT ELIZABETH H S
		CENTRAL INDEX KEY:			0001187266

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14657
		FILM NUMBER:		03837491

	BUSINESS ADDRESS:	
		STREET 1:		C/O NEOSE TECHNOLOGIES INC
		STREET 2:		102 WITMER ROAD
		CITY:			HORSHAM
		STATE:			PA
		ZIP:			19044
		BUSINESS PHONE:		2153159000

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MEDIMMUNE INC /DE
		CENTRAL INDEX KEY:			0000873591
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				521555759
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		35 W WATKINS MILL RD
		CITY:			GAITHERSBURG
		STATE:			MD
		ZIP:			20878
		BUSINESS PHONE:		3014170770

	MAIL ADDRESS:	
		STREET 1:		35 W WATKINS MILL ROAD
		CITY:			GAITHERSBURG
		STATE:			MD
		ZIP:			20878
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c0001187266d20030812f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-12</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000873591</issuerCik><issuerName>MEDIMMUNE INC /DE</issuerName>        <issuerTradingSymbol>MEDI</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001187266</rptOwnerCik><rptOwnerName>WYATT ELIZABETH H S</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>35 WEST WATKINS MILL ROAD</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>GAITHERSBURG</rptOwnerCity><rptOwnerState>MD</rptOwnerState><rptOwnerZipCode>20878</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle></officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><nonDerivativ
eTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-08-12</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>1000</value></transactionShares><transactionPricePerShare><value>36.6</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><derivati
veTable></derivativeTable><footnotes></footnotes><ownerSignature><signatureName>Timothy R Pearson</signatureName><signatureDate>2003-08-12</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----