Amy is entirely correct.
Is this the definitive treatment of the fracture? If so, you can code 26720, with the first cast included in the 90-day global.
If the documentation supports a separate E&M, you would use a -57 modifier so that it does not get kicked out.
In general, if your provider only sees a patient once or twice in the global period, using a fracture management code -may- make more money than inidividual E&Ms, but patients often get upset when they get a EOB suggesting a "procedure" was done and a charge for $1000, and the headaches of explaining how a global period works may not be worth the overall reimbursement. We also have ER docs throwing a splint on and charging a fracture code with absolutely zero intent of seeing the patient during the global, in which case, the use of 54/55 modifier is mandated by CMS but use is spotty in real life.
N.