Filed by IGEN International, Inc. pursuant to Rules 165 and 425 promulgated
under the Securities Act of 1933, as amended, and deemed filed pursuant to
Rule 14a-12 promulgated under the Securities Exchange  Act of 1934, as
amended.

Investors and security holders are urged to read the proxy  statement/prospectus
regarding  the business  combination  transaction  referenced  in the  foregoing
information,  when it  becomes  available,  because  it will  contain  important
information.  The proxy  statement/prospectus  will be filed with the Securities
and Exchange Commission by IGEN and IGEN Integrated  Healthcare,  LLC. Investors
and  security  holders may obtain a free copy of the proxy  statement/prospectus
(when it is available)  and other  documents  filed by IGEN and IGEN  Integrated
Healthcare,  LLC with the SEC at the  SEC's web site at  www.sec.gov.  The proxy
statement/prospectus  (when it is available) and these other  documents may also
be obtained  for free from IGEN by  directing  a request to IGEN  International,
Inc., 16020 Industrial Drive, Gaithersburg, MD 20877, (301) 869-9800, Attention:
Secretary.

IGEN,  its  directors,  and certain of its executive  officers may be considered
participants  in the  solicitation  of proxies in  connection  with the business
combination  transaction  referenced in the foregoing  information.  Information
about the directors and executive  officers of IGEN and their  ownership of IGEN
stock is set forth in IGEN's Proxy  Statement with respect to its Annual Meeting
for the year ended March 31, 2003.  Investors may obtain additional  information
regarding   the   interests   of  such   participants   by  reading   the  proxy
statement/prospectus when it becomes available.


Subject Company: IGEN International, Inc.
Commission File No.: 000-23252

FOR IMMEDIATE RELEASE

CONTACTS:
George Migausky                    Jonathan Fassberg (investors)
IGEN International                 The Trout Group
(301) 869-9800, ext. 2013          (212) 477-9007, ext. 16

Paul Caminiti or Andrew Cole (media)
Citigate Sard Verbinnen
(212) 687-8080


                       IGEN REPORTS FIRST QUARTER RESULTS

GAITHERSBURG,  MD,  July 30, 2003 -- IGEN  International,  Inc.  (Nasdaq:  IGEN)
reported  today that its  revenues  for the first  quarter  ended June 30, 2003,
increased  42% to $17.1  million,  compared to $12.0  million in the same period
last year.  The  increase  in revenues  was driven by product  sales and royalty
income.  Product sales increased 51% to $5.4 million for the quarter and royalty
income increased 43% to $11.6 million for the same period. Product sales reflect
growth fueled by sales of the Company's biodefense testing products for Homeland
Security  and  biodefense  initiatives,  as well as growth in the life  sciences
business. The growth in royalty income was driven primarily from increased sales
by Roche Diagnostics of products based on the Company's ORIGEN(R) technology.

Product costs were $2.6 million for the current quarter compared to $1.3 million
in the prior year's  period.  The increased  product  costs,  as a percentage of
product sales, were primarily attributable to third party leasing costs incurred
by  the  Company  related  to  instruments  being  used  by  Physician's  Office
Laboratory customers,  which were previously paid by Roche and costs incurred by
the Company in  connection  with the recent  launch of its new  M-SERIES(R)  384
instrument and upgraded detection modules for life science customers.

Research and development  expenses  decreased 5% to $5.5 million for the quarter
from $5.8 million in the prior  year's  first  quarter.  Selling,  general,  and
administrative  expenses  were $6.1  million in the first  quarter,  versus $5.9
million  in  the  prior  year's  first  quarter.  This  increase  was  primarily
attributable to higher insurance costs and outside professional fees.

Costs related to IGEN's  litigation  with Roche increased to $3.6 million in the
quarter  compared  to $1.1  million  for the same  period  in fiscal  2002.  The
increase in litigation  related expenses  reflects costs incurred related to the
appellate phase of the Roche litigation, patent infringement actions prepared by
the  Company   against  Roche  and  advisors  fees  associated  with  settlement
discussions  with  Roche,   including   discussions  related  to  the  announced
transaction described below.




Costs incurred by the Company for MSD joint venture  activities,  as recorded in
"Equity in Loss Affiliate", were $5.2 million in the quarter ended June 30, 2003
compared to $4.4 million for the prior year.  These costs are part of the budget
for MSD  previously  approved by an  independent  committee  of IGEN's  Board of
Directors.

For quarter ended June 30, 2003,  the net loss  decreased to $7.2 million ($0.30
per common  share),  compared to $7.4  million  ($0.33 per common  share) in the
prior year's first quarter.

IGEN  announced on July 24, 2003 that it had reached  definitive  agreements  to
resolve  its  long-running  dispute  with  Roche on the  rights to  ORIGEN.  The
transaction  will enable both companies to  independently  maximize the value of
their respective technology assets and businesses.

Under the terms of the  agreements,  Roche will acquire IGEN,  thereby  securing
rights to ORIGEN technology used in its Elecsys(R) diagnostics product line. For
each IGEN share,  IGEN shareholders will receive $47.25 in cash and one share of
a  newly  formed  public  company  to be spun  off by  IGEN  in a fully  taxable
transaction.  IGEN has 26.7 million fully diluted  outstanding  shares.  The new
company,  which  will be  100%  owned  by IGEN  shareholders,  will  own  ORIGEN
technology,  assume  certain  ongoing  IGEN  businesses  and is expected to have
approximately  $155 million in working  capital.  This  working  capital will be
provided  primarily  by Roche as part of the  transaction,  in  addition  to the
$47.25 per share cash payment to be made to IGEN shareholders.

Upon  completion of the  acquisition,  the new company to be spun-off by IGEN to
its  shareholders  will hold  IGEN's  patents  and assume its  biodefense,  life
science and  industrial  businesses,  as well as  opportunities  in the clinical
diagnostics  field.  The new company will also hold IGEN's interests in the Meso
Scale Diagnostics ("MSD") joint venture. The new company will be able to address
the entire clinical  diagnostic market,  including the hospital,  blood bank and
reference lab markets that were previously  exclusively  held by Roche.  The new
company will also  receive  rights to certain  improvements  relating to Roche's
Elecsys  product  line and  royalty-bearing  licenses  to PCR,  a  nucleic  acid
amplification technology, for use in most fields. The new company, which will be
named  prior to closing  the  transaction,  will be  managed  by IGEN's  current
management team and headquartered in Gaithersburg, Maryland. It is expected that
the new  company's  shares  will be  listed  on Nasdaq  upon  completion  of the
spin-off.

As part of the  agreement,  Roche has paid IGEN $18.6  million for  compensatory
damages as confirmed on July 9, 2003 by the U.S. Court of Appeals for the Fourth
Circuit  and the  royalties  owed to IGEN for the quarter  ended June 30,  2003.
Effective  immediately,  there will be no further  royalties  owed to IGEN,  and
Roche will pay a fixed fee of $5 million per month to IGEN for the use of ORIGEN
technology  pending  completion of the transaction.  As part of the transaction,
the MSD joint venture  agreement will expire  although many of the new company's
licenses and other  arrangements  with MSD and MST will  continue in  accordance
with the existing terms with the new company standing in IGEN's place. Following
the closing,  the new company will make a final  capital  contribution  of $37.5
million  to MSD.  Samuel J.  Wohlstadter  IGEN's  Chairman  and Chief  Executive
Officer will provide the portion of this contribution  over $30 million through
the purchase of a new series of preferred stock.






IGEN will host a conference call today at 4:30 p.m. EDT to discuss first quarter
results  and the  transaction  agreements  with  Roche.  To  participate  in the
conference  call,  dial   1-800-640-7899   (United  States)  or   1-212-346-6450
(international) ten minutes before the starting time. A replay will be available
for 48 hours at 1-800-633-8284  and  1-402-977-9140.  The reservation  number is
21155706. Both the live call and the replay will be webcast at www.igen.com.

IGEN develops and markets biological  detection systems based on its proprietary
ORIGEN   technology,   which  provides  a  unique  combination  of  sensitivity,
reliability,  speed and  flexibility.  ORIGEN-based  systems  are used in a wide
variety of applications, including clinical diagnostics, pharmaceutical research
and development,  life science research, biodefense testing and testing for food
safety and quality control.  These systems are marketed globally by IGEN and its
licensees  and/or  distributors.  IGEN is based in  Gaithersburg,  Maryland with
offices  in San  Diego,  California  and  Witney,  England.  IGEN and ORIGEN are
registered  trademarks of IGEN  International,  Inc. More information  about the
company can be found at http://www.igen.com .

Investors and security holders are urged to read the proxy  statement/prospectus
regarding  the business  combination  transaction  referenced  in the  foregoing
information,  when it  becomes  available,  because  it will  contain  important
information.  The proxy  statement/prospectus  will be filed with the Securities
and Exchange Commission by IGEN and IGEN Integrated  Healthcare,  LLC. Investors
and  security  holders may obtain a free copy of the proxy  statement/prospectus
(when it is available)  and other  documents  filed by IGEN and IGEN  Integrated
Healthcare,  LLC with the SEC at the  SEC's web site at  www.sec.gov.  The proxy
statement/prospectus  (when it is available) and these other  documents may also
be obtained  for free from IGEN by  directing  a request to IGEN  International,
Inc., 16020 Industrial Drive, Gaithersburg, MD 20877, (301) 869-9800, Attention:
Secretary.

IGEN,  its  directors,  and certain of its executive  officers may be considered
participants  in the  solicitation  of proxies in  connection  with the business
combination  transaction  referenced in the foregoing  information.  Information
about the directors and executive  officers of IGEN and their  ownership of IGEN
stock is set forth in IGEN's Proxy  Statement with respect to its Annual Meeting
for the year ended March 31, 2003.  Investors may obtain additional  information
regarding   the   interests   of  such   participants   by  reading   the  proxy
statement/prospectus when it becomes available.

This  release  contains  forward-looking  statements  within the  meaning of the
Private  Securities  Litigation Reform Act of 1995,  including  statements about
revenue growth,  market acceptance of new products,  business operations,  Roche
litigation  and  transaction,  trends and changes in  financial  or  operational
performance,  technology or product plans,  revenue growth and  prospective  new
licensing or business  agreements.  Actual results might differ  materially from
these statements due to risks and uncertainties, including those associated with
competitive  products,  market acceptance of products,  market  conditions,  our
ability to develop and introduce new or enhanced products,  our ability to enter
into new  collaborations,  our  ability to develop our  manufacturing,  selling,
marketing and distribution  capabilities,  protection and validity of patent and
other intellectual property rights and our ability to enforce those rights. More
complete  descriptions  of the risks  applicable to IGEN appear in the Company's
documents filed with the Securities and Exchange Commission and are available on
request for the Company. IGEN disclaims any intent or obligation to update these
forward-looking statements.



                           (Financial data follows.)


                                              IGEN International, Inc.
                                              Statements of Operations
                                       (In thousands, except per share data)
                                                    (Unaudited)





                                                                   Three months ended June 30,

                                                                  2003                      2002

Revenues:
                                                                                   
Royalty income                                                 $ 11,558                  $  8,107
Product sales                                                     5,419                     3,592
Contract fees                                                        89                       300
                                                               --------                  --------
                                                                 17,066                    11,999
                                                               --------                  --------
Operation costs and expenses:
Product costs                                                     2,643                     1,332
Research and development                                          5,476                     5,768
Selling, general and administrative                               6,113                     5,934
Litigation related costs                                          3,599                     1,141
                                                               --------                  --------
                                                                 17,831                    14,175
                                                               --------                  --------

Loss from operations                                               (765)                   (2,176)

Interest expense, net                                            (1,234)                     (763)

Equity in loss of affiliate                                      (5,230)                   (4,423)
                                                               --------                  --------

Net loss                                                         (7,229)                   (7,362)

Preferred dividends                                                   -                      (198)
                                                               --------                  --------

Net loss attributed to common shareholders                     $ (7,229)                 $ (7,560)
                                                               ========                  ========

Basic and diluted net loss per share                           $   0.30                  $   0.33
                                                               ========                  ========

Shares used in computing loss per share                          23,760                    23,171
                                                               ========                  ========





                                                 Summary Consolidated Balance Sheet Data
                                                             (In thousands)
                                                     June 30, 2003         March 31, 2003
                                                      (Unaudited)
Assets:
                                                                           
Cash and short-term investments                        $22,306                   $34,245
Other current assets                                    23,088                    22,799
Capital and noncurrent assets                           23,837                    18,222
                                                       -------                   -------
Total                                                  $69,231                   $75,266
                                                       =======                   =======

Liabilities and stockholders' equity:
Current liabilities                                    $19,783                   $18,089
Noncurrent liabilities                                  43,395                    44,436
Stockholders' equity                                     6,053                    12,741
                                                       -------                   -------
Total                                                  $69,231                   $75,266
                                                       =======                   =======