def pharmacy_network(params = {})
      npi = params.delete :npi
      endpoint = npi ? "pharmacy/network/#{npi}" : "pharmacy/network"
      get(endpoint, params)
    end
def pharmacy_network(params = {})
      npi = params.delete :npi
      endpoint = npi ? "pharmacy/network/#{npi}" : "pharmacy/network"
      get(endpoint, params)
    end
Invokes the pharmacy network cost endpoint.

 +params+ an optional Hash of parameters