Appendix 1 Additional level 2 coding examples of mandibular fractures. (A) Level 2 code: 91 S. Fracture in the symphysis/parasymphysis subdivision. (B) Level 2 code: 91 m.B. Isolated body fracture. (C) Level 2 code: 91 m.B-A. Unilateral double mandibular fracture: Anterior body and angle/ramus region. (D) Level 2 code: 91 A.m. Isolated/single fracture in the mandibular angle/ramus region (vertical). (E) Level 2 code: 91 A.m. Isolated/single fracture in the mandibular angle/ramus region (horizontal). (F) Level 2 code: 91 A.m. Isolated/single fracture in the mandibular angle/ramus region (vertical in transition zone). (G) Level 2 code: 91 P.m. Isolated/single condylar base fracture on the right side with extension into the coronoid. There is however no coronoid fracture. (H) Level 2 code: 91 B-S. Fracture with contiguous involvement of two subdivisions; the body on the right and the symphysis subdivision. The right angle is not included, since the fracture is centered in the body with a single line terminating within the posterior transition zone. (I) Level 2 code: 91 C.S-B. Coronoid fracture on the right side combined with a contiguous fracture in the symphysis subdivision and body region on the left side (i.e. a non-cofined fracture). (J) Level 2 code: 91 P.S.P. Triple mandible fracture: symphysis and condylar process bilaterally. (K) Level 2 code: 91 A.m.B. Bilateral double mandible fracture: Anterior body and contralateral angle/ramus. (L) Level 2 code: 91 S. Bilateral double mandible fracture at the outer ends of the symphysis subdivision.