M85.0 - Fibrous dysplasia (monostotic)
M85.02 - Fibrous dysplasia (monostotic), upper arm
M85.021 - Fibrous dysplasia (monostotic), right upper arm
M85.022 - Fibrous dysplasia (monostotic), left upper arm
M85.029 - Fibrous dysplasia (monostotic), unspecified upper arm