The CMS-1500 form is primarily used to bill which type of services?

• A. Inpatient hospital services
• B. Pharmacy claims
• C. Professional services to third-party payers
• D. Durable medical equipment

Answer: (C)

The form is used for billing professional services provided by physicians and other non-institutional providers to third-party payers. This covers office visits, consultations, and procedures carried out on a professional basis, not the facility charges themselves. Inpatient hospital charges are reported on a different form (the UB-04), pharmacy claims have their own billing streams (like NCPDP or electronic 837-P), and durable medical equipment uses its own claim formats (such as 837-DME or other DME-specific forms). So, the CMS-1500 is the standard for professional services billed to insurers.