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src="images/slide-01.jpg" alt="Schedule a sick visit online anytime! Banner image for Peninsula Gastroenterology Medical Group, Gastroenterologists"> </div>  </div>  <div class="clearfix"></div> </div>  </div>  <div id="content-wrapper"> <div id="breadcrumbtree-wrapper">  </div> <div id="content-container"> <section id="main-content" class="left-col"> <div id="content"> <h1>Daniel Rengstorff, M.D.</h1> <p><img class="float-right" alt="Dan Rengstorff, M.D. - Peninsula Gastroenterology Medical Group" src="/client_files/image/dr-rengstorff-2019.jpg" />Dr. Rengstorff was born and raised in the Bay Area. He attended medical school at Georgetown University School of Medicine and completed his residency at Vanderbilt University Medical Center. He later returned to the Bay Area to complete his fellowship in Gastroenterology at California Pacific Medical Center.</p><p>During his fellowship Dr. Rengstorff was involved in studies evaluating the treatment of bleeding gastric varices and toxin induced hepatitis. Dr. Rengstorff is married and has one son. While not involved in patient care he enjoys golfing, skiing and wood working.</p> <div class="clearfix"></div> </div>  <div class="clearfix"></div> </section>  <section id="right-col" class="screenonly"> <h2>Related Links</h2> <nav class="subnav"> <ul><li><a class="" href="http://www.gipractice.com/james-torosis-md.php">James Torosis, M.D.</a></li><li><a class="" href="http://www.gipractice.com/vicky-yang-md.php">Vicky Yang, M.D.</a></li><li><a class="selectedon" href="http://www.gipractice.com/daniel-rengstorff-md.php">Daniel Rengstorff, M.D.</a></li><li><a class="" href="http://www.gipractice.com/cynthia-leung-md.php">Cynthia Leung, M.D.</a></li><li><a class="" href="http://www.gipractice.com/hoan-nguyen-pac.php">Hoan B. Nguyen, PA-C</a></li></ul> </nav> </section> <div class="clearfix"></div> </div>  </div>  <div id="endoscopy-wrapper" class="screenonly"> <img src="images/atherton-endoscopy-center.jpg" alt="Atherton Endoscopy Center photo" class="img"> <div class="content-wrap"> <h1 class="center"><a href="office-atherton.php" title="Atherton Endoscopy Center">Atherton Endoscopy Center</a></h1> <div class="content"> <div class="float-right"> <a href="office-atherton.php" title=""><img src="images/atherton-endoscopy-reception.jpg" alt=""></a><br><a href="office-atherton.php" title="Atherton Endoscopy Center" class="button fullwidth"><i class="fa fa-map-marker"></i> Map & Directions</a> </div> <p>While you are a patient at Atherton Endoscopy Center, our highly competent and professional staff will care for you. Everyone from the receptionist to the physician embraces our philosophy of patient-focused care. Above all, our staff is friendly and concerned for your comfort.</p> <p><img src="images/accreditation.png" alt=""></p> </div> </div> </div>  <div id="office-location-wrapper" class="screenonly"> <ul> <li><img src="images/mountain-view-office-sobrato.jpg" alt="Mountain View Office photo"><span class="content"><span class="phone">650-964-3636</span><br><br><a href="office-mountain-view.php" title="Map and Directions to the Mountain View office of Peninsula Gastroenterology Medical Group, Gastroenterologists">2495 Hospital Drive<br>Suite 600<br>Mountain View, CA 94040</a></span></li> <li><img src="images/redwood-city-office.jpg" alt="Redwood City Office photo"><span class="content"><span class="phone">650-365-3700</span><br><br><a href="office-redwood.php" title="Map and Directions to the Redwood City office of Peninsula Gastroenterology Medical Group, Gastroenterologists">2900 Whipple Ave<br>Suite 245<br>Redwood City, CA 94062</a></span></li> </ul> </div> <div id="footer-wrapper"> <footer id="footer"> <h2>Peninsula Gastroenterology Medical Group</h2> <p> </p> <ul class="footer-menu"> <li><a href="index.php" title="Home page for Peninsula Gastroenterology Medical Group, Gastroenterologists">Home</a> |</li> <li><a href="gastroenterology-specialists.php" title="Meet the Gastroenterology Specialists of Peninsula Gastroenterology Medical Group, Gastroenterologists">Providers</a> |</li> <li><a href="endoscopic-procedures.php" title="Medical Services and Endoscopic Procedures performed by Peninsula Gastroenterology Medical Group, Gastroenterologists">GI Services</a> |</li> <li><a href="procedure-prep.php" title="Procedure Prep instructions provided by Peninsula Gastroenterology Medical Group, Gastroenterologists" >Preps</a> |</li> <li><a href="office-atherton.php" title="Atherton Endoscopy Center">Endoscopy Center</a> |</li> <li><a href="patient-center.php" title="Forms, Insurance, Procedure Prep">Your Visit</a> |</li> <li><a href="locations.php" title="Office locations, endoscopy center affliations and hospital affiliations of Peninsula Gastroenterology Medical Group, Gastroenterologists">Locations</a> |</li> <li><a href="contact-us.php" title="Contact the offices of Peninsula Gastroenterology Medical Group, Gastroenterologists">Contact Us</a></li> </ul> <ul class="footer-menu">  <li><a href="patient-portal.php" title="Secure Online Patient Portal for the patients of Peninsula Gastroenterology Medical Group, Gastroenterologists" ><i class="fa fa-lock"></i> Patient Portal</a> | </li> <li><a href="https://surveys.reputation.com/surveys3/run?tenantKey=bc966ab61bf&templateId=5d717e3340f64637fd4adfe8&locale=en_US" target="_blank" title="Satisfaction survey for the patients of Peninsula Gastroenterology Medical Group, Gastroenterologists"><i class="fa fa-check-square"></i> Patient Survey</a></li> </ul> <div class="clearfix"></div> </footer>  <div id="footer-bottom"> <ul class="footer-menu screenonly"> <li><a href="privacy.php" title="Privacy Policy for Peninsula Gastroenterology Medical Group, Gastroenterologists">Privacy</a> | </li> <li><a href="sitemap.php" title="Sitemap for the website of Peninsula Gastroenterology Medical Group, Gastroenterologists">Sitemap</a></li> </ul> <ul class="footer-menu2"> <li>© 2024, Peninsula Gastroenterology Medical Group, Gastroenterologists. | <a title="Medical website development, hosting, management, maintenance, and marketing" href="http://www.medicalpracticewebsitedesign.com" target="_blank">Medical Practice Website Design</a> by <a title="Healthcare consulting and medical management for physicians" href="http://www.medicalpracticewebsitedesign.com" target="_blank">Medical Management Associates</a>.</li> </ul> </div>  </div> </div> <script type="text/javascript" src="js/jquery-3.6.0.min.js" ></script><script src="js/jquery.cycle2.js"></script><script src="js/jquery.cycle2.carousel.min.js"></script><script type="text/javascript">jQuery(document).ready(function($) { var $slider = document.getElementById('nav-wrapper'); var $toggle = document.getElementById('mtoggle'); $toggle.addEventListener('click', function() { var isOpen = $slider.classList.contains('slideIn'); $slider.setAttribute('class', isOpen ? 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