Final answer:
On the CMS-1500 form, the prior authorization number should be entered in block 23. This is crucial for ensuring coverage and timely reimbursement for health services.
Step-by-step explanation:
The prior authorization number for health services should be entered in block 23 of the CMS-1500 form.
This block is reserved for reporting prior authorization or referral numbers. It is essential to include this number when required by the payer to ensure that the services provided are covered and that reimbursement for the healthcare provider is not delayed or denied.
It is always important to double-check the payer's specific requirements for prior authorization to guarantee that all necessary information is included on the CMS-1500 form correctly.