The Large-toothed Batomys is known from the mountains of Benguet in northern Luzon, Philippines. Its type specimen was described with ochraceous-buff underparts and a white terminal half of the tail.
The original description records pale brown upperparts, ochraceous-buff underparts, and a pale chin and throat. The tail was dark near its base and white over its terminal half.
The only collecting record in the original account is from a high-elevation site in Benguet, northern Luzon, at about 2,100 m. The account gives no behavior or diet information.
An extinction-risk assessment has not been added yet.