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    Proprietary Laboratory Analyses Codes

    AMA CPT code subset that uniquely identifies a single proprietary clinical lab test (LDT or IVD) for pricing and tracking.

    Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed May 9, 2026

    Definition

    Proprietary Laboratory Analyses (PLA) codes are a subset of CPT Category I codes, introduced by the AMA in 2018, that assign a unique CPT code to a single proprietary clinical laboratory or molecular diagnostic test. Unlike generic molecular CPT codes (the 81xxx 'stack codes'), PLA codes give CMS, MACs, and commercial payers a clean way to set test-specific pricing on the Clinical Laboratory Fee Schedule (CLFS). PLA applications are reviewed quarterly by the AMA CPT Editorial Panel.
    What the regulation says
    Pricing is set under the CLFS via crosswalk or gapfill methodologies (PAMA-defined). MolDX and other MAC programs determine coverage.

    What this means in practice

    PLA codes are the dominant route for branded molecular diagnostics (oncology liquid biopsy, MRD assays, transplant rejection assays) to achieve test-specific reimbursement. Filing strategy and crosswalk positioning materially affect realized price.
    Common pitfalls
    • •Filing for PLA without a defensible crosswalk strategy — gapfill is unpredictable.
    • •Confusing PLA code issuance with payer coverage; coverage is a separate MAC/commercial payer decision.

    Primary references

    3 sources
    Link health: 1 verified 2 bot-blocked· last checked 2026-05-09
    AMA·2CMS·1
    1. 1
      AMA — PLA Codes
      Bot-blocked
      AMAama-assn.org
    2. 2
      CMS — Clinical Laboratory Fee Schedule
      Verified
      CMScms.gov
    3. 3
      AMA CPT Resources
      Bot-blocked
      AMAama-assn.org

    Inline markers like [1] jump to the matching reference above.