Diagnosis codes explain the medical necessity of the service.

Diagnosis codes explain the medical necessity of the service.

• A. True
• B. False
• C. Not Applicable
• D. Sometimes

Answer: (A)

In medical billing, the diagnosis code represents the patient’s condition or the reason for the encounter, and that reason is what justifies the service being performed. Medical necessity hinges on the service being reasonable and appropriate to diagnose or treat the identified condition, and the ICD-10-CM diagnosis provides the rationale for billing the CPT/HCPCS service. Payers look for alignment between the diagnosis and the service and require documentation that supports why the specific service was necessary for that diagnosis. For example, a patient with a diagnosed infection who receives an order for a relevant test or procedure uses that diagnosis to justify the test; without a supporting diagnosis, the claim may be denied. In short, the diagnosis code explains why the service was medically necessary, so the statement is true.

In medical billing, the diagnosis code represents the patient’s condition or the reason for the encounter, and that reason is what justifies the service being performed. Medical necessity hinges on the service being reasonable and appropriate to diagnose or treat the identified condition, and the ICD-10-CM diagnosis provides the rationale for billing the CPT/HCPCS service. Payers look for alignment between the diagnosis and the service and require documentation that supports why the specific service was necessary for that diagnosis. For example, a patient with a diagnosed infection who receives an order for a relevant test or procedure uses that diagnosis to justify the test; without a supporting diagnosis, the claim may be denied. In short, the diagnosis code explains why the service was medically necessary, so the statement is true.