CMS-1500 Box 24D: CPT and HCPCS Codes

Procedure code first

Select the code that accurately describes the service documented. Do not infer a code from the charge amount or from an old claim.

Modifiers change context

Modifiers can communicate important circumstances about a service. Use only those supported by the documentation and applicable coding or payer rules.

Review companions

Compare Item 24D with dates, POS, diagnosis pointers, charges, and units.

Service-line review

• Confirm that the procedure code and any modifiers describe the documented service for that date.
• Review code, modifiers, units, diagnosis pointers, and place of service as one service-line package.
• Use current coding references for the applicable date of service rather than a saved code list.

How Item 24D fits the rest of the service line

Item 24D does not stand alone. A procedure code may need one or more modifiers, and the meaning of the line is completed by the date of service, place of service, diagnosis pointer, units, charge, and rendering-provider information. When staff change a code, they should deliberately scan across the rest of that line instead of assuming the surrounding values still fit. This is especially important with copied claims, where the procedure code may be updated but an old modifier or unit count remains.

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 Healthcare Common Procedure Coding System (HCPCS)
• NUCC 1500 Claim Form Reference Instruction Manual
• CMS Medicare Claims Processing Manual, Chapter 26

Related guides

• CMS-1500 Box 31: Provider Signature
• CMS-1500 Box 24F: Charges
• CMS-1500 Box 24E: Diagnosis Pointers