A billing and coding specialist should enter the prior authorization number on the CMS-1500 claim for in which of the following blocks?

• A. Block 23
• B. Block 9
• C. Block 14
• D. Block 32

Answer: (A)

The main idea here is where to record a prior authorization on a CMS-1500 claim. The field that is specifically designated for authorization details is the block that houses the prior authorization number. Placing the PA number in this area ensures the payer can quickly verify the pre-approval and match it to the submitted services, which helps the claim process move smoothly and reduces the risk of denial.

Other blocks on the CMS-1500 are used for different information, such as dates of service, patient and policy details, or the actual service codes and charges. Those blocks aren’t intended for recording the prior authorization number, so the PA information belongs in the authorization/referral block.