**EXHIBIT 31.1****SARBANES-OXLEY SECTION 302 CERTIFICATION**I, William H. Wilcox, certify that:1. I have reviewed this quarterly report on Form 10-Q of United SurgicalPartners International, Inc.; 2. Based on my knowledge, this report does not contain any untruestatement of a material fact or omit to state a material factnecessary to make the statements made, in light of the circumstancesunder which such statements were made, not misleading with respect tothe period covered by this report; 3. Based on my knowledge, the financial statements, and other financialinformation included in this report, fairly present in all materialrespects the financial condition, results of operations and cash flowsof the Registrant as of, and for, the periods presented in thisreport; 4. The Registrant’s other certifying officer and I are responsible forestablishing and maintaining disclosure controls and procedures (asdefined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internalcontrol over financial reporting (as defined in Exchange Act Rules13a-15(f) and 15d-15(f)) for the Registrant and have: a) Designed such disclosure controls and procedures, orcaused such disclosure controls and procedures to bedesigned under our supervision, to ensure thatmaterial information relating to the Registrant,including its consolidated subsidiaries, is made knownto us by others within those entities, particularlyduring the period in which this report is beingprepared;  b) Designed such internal control over financialreporting, or caused such internal control overfinancial reporting to be designed under oursupervision, to provide reasonable assurance regardingthe reliability of financial reporting and thepreparation of financial statements for externalpurposes in accordance with generally acceptedaccounting principles;  c) Evaluated the effectiveness of the Registrant’sdisclosure controls and procedures and presented inthis report our conclusions about the effectiveness ofthe disclosure controls and procedures, as of the endof the period covered by this report based on suchevaluation; and  d) Disclosed in this report any change in theRegistrant’s internal control over financial reportingthat occurred during the Registrant’s most recentfiscal quarter (the Registrant’s fourth fiscal quarterin the case of an annual report) that has materiallyaffected, or is reasonably likely to materiallyaffect, the Registrant’s internal control overfinancial reporting; and5. The Registrant’s other certifying officer and I have disclosed, basedon our most recent evaluation of internal control over financialreporting, to the Registrant’s auditors and the audit committee of theRegistrant’s board of directors (or persons performing the equivalentfunctions): a) All significant deficiencies and material weaknessesin the design or operation of internal control overfinancial reporting which are reasonably likely toadversely affect the Registrant’s ability to record,process, summarize and report financial information;and  b) Any fraud, whether or not material, that involvesmanagement or other employees who have a significantrole in the Registrant’s internal control overfinancial reporting.        /s/ William H. Wilcox  William H. Wilcox  President and Chief Executive Officer   August 10, 2007