<select [(ngModel)]="changeDetails.program" name="program" #program="ngModel" required
     class="form-control" (change)="HandleChange(???)">
         <option *ngFor="let subProgram of programs" [value]="subProgram.value">
         {{subProgram}}</option>
</select>

HandleChange(???) {
   // use model value on class? or parameter?
}