Which block contains the service facility's NPI?

• A. Block 31
• B. Block 32
• C. Block 33
• D. Block 32a

Answer: (D)

In CMS-1500 claims, the facility that provided the service has a dedicated NPI field to identify it. The service facility’s NPI is entered in the block designated for the service facility’s NPI, which is Block 32a. Block 32 itself holds the facility’s name and address, not the NPI. This separation keeps the facility’s identity and its identifier distinct from the billing provider’s information (which appears elsewhere on the form). Knowing that the NPI for the service facility goes specifically in Block 32a explains why this is the correct place to record it.