Final answer:
The DMEPOS coding system is used to identify and bill for medical supplies and services not included in CPT codes, such as ambulance services and durable medical equipment.
Step-by-step explanation:
The coding system being referred to in this question is the Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS) coding system. This coding system is primarily used to identify products, supplies, and services that are not included in the Current Procedural Terminology (CPT) codes, such as ambulance services and durable medical equipment.
The DMEPOS coding system is used outside a physician's office to accurately identify and bill for these specific medical supplies and services. It helps in streamlining the coding and billing process, ensuring proper reimbursement for providers and accurate records for insurance companies.