Ratings for Dr. Robert S. Muhumuza. Staff 5. Punctuality 5. Helpfulness 5. Knowledge 5. We were introduced to Dr.Muhumuza and his Nurse Practioner, Heather Harris, via the emergency room at Baton Rouge General Bluebonnet. My husband had recently been under the care of another GI doctor prior to this ER visit, but we knew as soon as we met Dr ....