Rate and review Doctor Manalo on patientschoice.org. This physician has current office locations in Nashville, TN and has been practicing for over 19 years in their current profession. Post reviews on other Gastroenterologist, Internists who you have had positive or negative office visit experiences with in the past. PCA empowers the patient with information to help you make a more informed decision when choosing a qualified doctor in your area. If you think you have an excellent Gastroenterologist, Internist then show your appreciation and help nominate Doctor Manalo as a Patients' Choice Award winner.