The physician ordered her 69-year-old patient for a troponin test. Therefore, the CPT code that should be use for troponin quantitative assay is CPT code 84484 and the CPT code 84512 identifies the qualitative assay for troponin. In addition, ICD-10-CM code R079 is the medical code that can be used to indicate a diagnosis for chest pain, which is an exact match to ICD-9 code 785.50 for unspecified chest pain.