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Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Robert A. Ortenzio, President and Chief Executive Officer of Select Medical
Corporation, certify that:



| | 1. |  | I have reviewed this quarterly report on Form 10-Q of Select
Medical Corporation;
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| | 2. |  | Based on my knowledge, this quarterly report does not contain any
untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect to
the period covered by this quarterly report;
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| | 3. |  | Based on my knowledge, the financial statements, and other
financial information included in this quarterly report, fairly present
in all material respects the financial condition, results of operations
and cash flows of the registrant as of, and for, the periods presented
in this quarterly report;
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| | 4. |  | The registrants other certifying officer and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
registrant and we have:
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| | a) |  | designed such disclosure controls and procedures, or caused such
disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known
to us by others within those entities, particularly during the
period in which this quarterly report is being prepared;
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| | c) |  | evaluated the effectiveness of the registrants disclosure controls
and procedures and presented in this report our conclusions about
the effectiveness of the disclosure controls and procedures, as of
the end of the period covered by this quarterly report based on
such evaluation; and
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| | d) |  | disclosed in this quarterly report any change in the
registrants internal control over financial reporting that
occurred during the registrants most recent fiscal quarter that
has materially affected, or is reasonably likely to materially
affect, the registrants internal control over financial
reporting; and
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| | 5. |  | The registrants other certifying officer and I have disclosed,
based on our most recent evaluation of internal control over financial
reporting, to the registrants auditors and the audit committee of the
registrants board of directors (or persons performing the equivalent
functions):
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| | a) |  | all significant deficiencies and material weaknesses in the design
or operation of internal control over financial reporting which are
reasonably likely to adversely affect the registrants ability to
record, process, summarize and report financial information; and
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| | b) |  | any fraud, whether or not material, that involves management or
other employees who have a significant role in the registrants
internal control over financial reporting.
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Date: November 14, 2003

/s/ Robert A. OrtenzioRobert A. Ortenzio
President and Chief Executive Officer