What coding classification or nomenclature system or systems are used to code professional and technical services by physicians and other health care professionals for services performed in outpatient settings?

Question

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CPT-4 (Current Procedural Terminology, Fourth Edition) is the coding system used to code professional and technical services provided by physicians and other health care professionals for services performed in outpatient settings. It includes codes for procedures, surgeries, and other medical services. ICD-O is used for coding cancer diagnoses, ICD-9-CM is used for coding diagnoses in inpatient and outpatient settings, and SNOMED-CT is used for electronic health records and clinical decision-making.

What Coding Classification or Nomenclature System or Systems Are Used