How do ICD-10 codes differ from CPT codes?

• A. ICD-10 codes describe actions; CPT codes identify diagnoses
• B. ICD-10 codes identify diagnoses; CPT codes describe actions
• C. Both identify diagnoses
• D. They are the same

Answer: (B)

The main idea is that ICD-10 codes identify diagnoses while CPT codes describe actions or services performed. ICD-10-CM (diagnosis codes) capture the patient’s condition or reason for the encounter, which helps explain why care was needed. CPT codes (Current Procedural Terminology) represent the procedures, tests, or dental/medical services carried out, focusing on the actions taken. On a claim, both types are needed: the ICD-10 diagnosis codes justify medical necessity, and the CPT codes describe exactly what was done. The other options mix up the roles or claim they are the same, which isn’t accurate. (Also, note there is a separate ICD-10-PCS coding system for inpatient procedures, distinct from CPT.)