View source for Definition:CPT code

📋 '''CPT code''' — Current Procedural Terminology code — is a standardized numeric code maintained by the American Medical Association (AMA) that identifies specific medical, surgical, and diagnostic services performed by healthcare providers, serving as the primary coding language through which [[Definition:Health insurance | health insurers]] in the United States process and adjudicate [[Definition:Health insurance claim | claims]]. Every time a physician, hospital, or other provider submits a claim to a [[Definition:Health insurer | health insurer]] or [[Definition:Third-party administrator (TPA) | third-party administrator]], CPT codes communicate precisely what procedures were performed, enabling the insurer's [[Definition:Claims processing | claims processing]] systems to match services to [[Definition:Fee schedule | fee schedules]], verify [[Definition:Medical necessity | medical necessity]], apply [[Definition:Utilization management | utilization management]] rules, and calculate the appropriate [[Definition:Reimbursement | reimbursement]].

⚙️ The CPT code set is organized into three categories. Category I codes cover the vast majority of clinical procedures and services — office visits, surgical operations, radiology, pathology, and similar activities — and are the codes most commonly encountered in insurance billing. Category II codes are supplemental tracking codes used for performance measurement and quality reporting, while Category III codes capture emerging technologies and experimental procedures. Health insurers build their entire [[Definition:Claims adjudication | claims adjudication]] infrastructure around CPT codes: [[Definition:Explanation of benefits (EOB) | explanations of benefits]], [[Definition:Provider contract | provider contracts]], [[Definition:Prior authorization | prior authorization]] requirements, and [[Definition:Fraud detection | fraud detection]] algorithms all reference CPT codes as their fundamental unit of analysis. Incorrect or unbundled coding is a leading source of [[Definition:Insurance fraud | claims fraud]] and billing disputes, making CPT code validation a core function of insurer operations.

💡 The practical impact of CPT codes on the health insurance industry can hardly be overstated. They determine how revenue flows between providers and insurers, shape [[Definition:Medical loss ratio (MLR) | medical loss ratio]] outcomes, and inform [[Definition:Actuarial analysis | actuarial pricing]] of health products by providing granular utilization data. [[Definition:Insurtech | Insurtech]] companies have built analytics platforms that mine CPT-level claims data to identify cost trends, detect anomalous billing patterns, and improve [[Definition:Underwriting | underwriting]] accuracy for group health and [[Definition:Stop-loss insurance | stop-loss]] products. While CPT codes are specific to the U.S. healthcare system, other countries use analogous procedure coding systems — such as the OPCS Classification of Interventions and Procedures in the UK and the Medicare Benefits Schedule in Australia — that serve similar functions in their respective [[Definition:Health insurance | health insurance]] markets. The AMA's proprietary control over CPT has itself been a subject of policy debate, given the code set's quasi-regulatory role in a multitrillion-dollar payment system.

'''Related concepts:'''
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* [[Definition:Claims adjudication]]
* [[Definition:Fee schedule]]
* [[Definition:Medical loss ratio (MLR)]]
* [[Definition:Explanation of benefits (EOB)]]
* [[Definition:ICD code]]
* [[Definition:Health insurance claim]]
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