INDIANAPOLIS — Cornerstone Cos. Inc. has completed the construction of a 30,325-square-foot dermatology center in Indianapolis. Dawes Fretzin Dermatology Group occupies the two-story building. The company has three additional locations in Indiana. The facility includes medical equipment and offices, reception areas and a dedicated children’s waiting area. The surgery treatment center offers patients Mohs Micrographic surgery, a specialized technique for the removal of skin cancer. Cornerstone served as the developer and general contractor for the yearlong construction project.