The Coordinating and Data Management Center (CDMC) at MD Anderson Cancer will be responsible for the coordination and data management for the Prospective Evaluation of Chronic Pancreatitis for Epidemiologic and Translational Studies (PROCCEED) Study, which is part of the NIH U01 funded Consortium for the Study of Chronic Pancreatitis, Diabetes, and Pancreatic Cancer (CPDPC). No patient enrollment will occur at MDACC. All patient recruitment will occur at external sites that are a part of the CPDPC. The data management systems, auditing, and monitoring effort are supported by the MD Anderson Cancer Center Clinical Research Support Center (CRSC). PROCEED is the first study in the USA that is carefully following participants to better understand factors that may be responsible for causing pancreatitis and how it progresses. The study is being conducted at the following 9 major clinical centers across the US: * Baylor College of Medicine * Cedars-Sinai Medical Center * University of Florida * Indiana University * Mayo Clinic * University of Minnesota * Ohio State University * Stanford University * University of Pittsburgh The study is enrolling participants who are at different stages of chronic pancreatitis, including those with no known pancreas disease (controls), and those with abdominal pain, one or more attacks of pancreatitis, or chronic pancreatitis. After enrollment, participants with abdominal pain and pancreatitis are asked to follow-up every year to learn about their symptoms and any changes in the disease. PROCEED investigators plan to use the detailed information they collect to better understand the disease and identify new treatments. More details and updated information about this study can be found at the study's public website: https://www.cpdpc-research-consortium.org/research- study-cpdpc-16-02-proceed.