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    Current Procedural Terminology Codes

    AMA-maintained codes used to report medical procedures and services for billing.

    Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed May 5, 2026

    Definition

    CPT codes are five-character codes maintained by the American Medical Association that describe medical, surgical, and diagnostic services. Category I codes describe established services; Category III codes describe emerging technologies.
    What the regulation says
    The Centers for Medicare & Medicaid Services (CMS) requires the use of CPT codes for billing Medicare and Medicaid services, as outlined in their billing and claims processing manuals. The American Medical Association (AMA) maintains the CPT code set and provides guidance on its appropriate use, as detailed in the annual CPT Manual.

    What this means in practice

    Reimbursement strategy for new devices often hinges on whether an existing Category I CPT code adequately describes the procedure or whether a Category III, then Category I application is needed.

    Examples

    • A medical device company developing a new surgical instrument seeks an existing Category I CPT code that accurately reflects the procedure performed with their device to ensure immediate reimbursement upon market entry.
    • A startup introduces a novel diagnostic test and applies for a Category III CPT code to gather utilization data and clinical evidence, aiming for a future Category I designation.
    • A hospital billing department uses a specific CPT code to submit claims for a patient who underwent an endoscopic procedure using a newly approved medical device.
    Common pitfalls
    • •Misinterpreting Category I codes as sufficient for novel procedures, potentially leading to claim denials.
    • •Failing to apply for a Category III CPT code for new technology, delaying reimbursement.
    • •Not understanding the specific documentation requirements associated with particular CPT codes.
    • •Using an unlisted CPT code without proper justification and accompanying documentation.

    Frequently asked questions

    CPT codes influence product development by signaling the existence of established reimbursement pathways, which can de-risk investment. Manufacturers may design their devices to better align with existing codes or develop strategies for new code applications.

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    Primary references

    2 sources
    Link health: 2 verified· last checked 2026-06-20
    AMA·1AdvaMed·1
    1. 1
      AMA CPT
      Verified
      AMAama-assn.org
    2. 2
      AdvaMed - Payment & Coverage
      Verified
      AdvaMedadvamed.org

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