Path
     ClaimResponse.addItem.detail.subDetail.productOrService
     Id
     ClaimResponse.addItem.detail.subDetail.productOrService
     Type
    
     Cardinality
     0 - 1
     Definition
     When the value is a group code then this item collects a set of related item details, otherwise this contains the product, service, drug or other billing code for the item. This element may be the start of a range of .productOrService codes used in conjunction with .productOrServiceEnd or it may be a solo element where .productOrServiceEnd is not used.
     Comment
     If this is an actual service or product line, i.e. not a Group, then use code to indicate the Professional Service or Product supplied (e.g. CTP, HCPCS, USCLS, ICD10, NCPDP, DIN, RxNorm, ACHI, CCI). If a grouping item then use a group code to indicate the type of thing being grouped e.g. 'glasses' or 'compound'.
    
     Requirements
     Necessary to state what was provided or done.
    
    
    
     Binding
      
      
    
     example 
  
    
     Allowable service and product codes.
    
    
     
    
    
     Constraint
     
      
      
      All FHIR elements must have a @value or children