Beginning with dates of service on or after November 1, 2019, new Inter-professional CPT codes 99451 and 99452 are not eligible for reimbursement when they are reported with another service or reported as a stand-alone service.
These codes have been added to policy section 1 of the Bundled Services and Supplies reimbursement policy.
Source: https://providernews.anthem.com/indiana/article/reimbursement-policy-update-bundled-services-professional