CMS-1500 Box 24B Place of Service: Coding Guide

Line-level setting

A provider can render different services in different settings. Review POS for each applicable line rather than assuming every line belongs to the same location.

Match service-facility information

When service-facility information is reported elsewhere on the claim, it should make sense with Item 24B.

Coding impact

Place of service can affect payer edits and payment methodology, so verify the current code and payer rules.

Before you finalize place of service

• Verify the actual setting where the service was furnished; do not choose a code only because it was used on the last claim.
• Compare the POS code with service-facility information and the payer’s current reimbursement rules.
• Use the current CMS POS code set for the code definition, then apply payer-specific billing policy.

Do not infer location from the provider address

The billing provider’s office address does not always identify where a particular service was rendered. Item 24B should reflect the service setting using the current POS code set, while Item 32 can carry service-facility information when applicable. In a multi-location or telehealth workflow, make the actual service setting a required review step instead of accepting a default code.

Sources and verification

Use the NUCC/CMS sources below to confirm current CMS-1500 instructions, then apply the payer’s rules for the specific professional claim.

• CMS Place of Service Code Set
• NUCC 1500 Claim Form Reference Instruction Manual
• CMS Medicare Claims Processing Manual, Chapter 26

Related guides

• CMS-1500 Form: Place of Service Codes
• CMS-1500 Box 24A: Dates of Service
• CMS-1500 Box 32: Service Facility Location