post https://sandbox-apigw.optum.com/oihub/pre-service/v1/claim/precheck
Note:
For Claims Pre-checkSupported Payer ID’s for UnitedHealthcare:
87726 03432 96385 95467 86050 86047 95378 06111 00773 36273 37602 39026 41161 41194 52461 65088 74227 76342 76343 78857 81400 88337 94265 95958 USN01 25463 UHNDC