Katsumi Clinic, located in the Toei area of Ojiya City, Niigata Prefecture, is a community-based medical practice specializing in internal medicine. The clinic operates on a priority appointment system, allowing patients to schedule visits at their preferred times by contacting the clinic in advance. Walk-in patients are also accepted, though depending on congestion, they may be asked to visit on another day, so first-time visitors are advised to confirm availability beforehand. The clinic ensures continuity of care by providing substitute doctors when the attending physician is unavailable. The facility is fully barrier-free, creating an accessible environment for patients with mobility concerns or those using wheelchairs. A parking lot is also available, accommodating patients who visit by private car in an area with limited public transportation options. The clinic is closed on Wednesdays, Sundays, and national holidays, as well as during Golden Week, the Obon period, and the year-end/New Year holidays, so patients are encouraged to check the schedule before visiting. As a cornerstone of local internal medicine care, the clinic serves the community's wide-ranging healthcare needs from routine health management to the treatment of internal medicine conditions.