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Documentation Index

Fetch the complete documentation index at: https://docs.corti.ai/llms.txt

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[
  {
    name: "coding-expert",
    type: "reference",
  }
]
The Medical Coding expert assigns diagnosis and procedure codes from clinical text using a structured, AI-assisted workflow. It can identify codes relevant to an admission even from incomplete data, and selects the most appropriate code system at runtime.
Medical Coding is essential for billing, claims, CDI, and revenue-cycle workflows where accurate, guideline-compliant codes are required.

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Capabilities

The Medical Coding expert can:
  • Predict candidate codes from a full clinical note
  • Search a code system from clinical text fragments
  • Explore the structure of a code system to drill into candidate codes
  • Retrieve coding guidelines that govern a given code or scenario
  • Verify a final code sequence against the code system before returning it

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Workflows

Every code assignment follows one of the structured workflows below. explore(), guidelines(), and verify() are always called — they are never skipped.
  • SEARCH-FIRST (from clinical text): search() → explore() → guidelines() → verify()
  • PREDICT-FIRST (from a full clinical note): predict() → explore() → guidelines() → verify()
  • GUIDELINES-FIRST (unfamiliar conventions): guidelines() → search() → explore() → guidelines() → verify()
  • VERIFY-AND-NARROW (refine predictions): predict() → explore() + guidelines() → verify() → predict(filter=include/exclude) → verify()
  • EXPLORE-FIRST (browse code system): explore() → explore() drill down → guidelines() → verify()
The expert never relies on search() alone — it can return overly specific codes or miss applicable coding rules. Codes already present in the orchestrator’s tool_data_part are preferred; MCP tools are only invoked if suitable codes are absent or insufficient.

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Use cases

  • Automated coding for billing and claims
  • Clinical documentation improvement (CDI) and audit support
  • Code validation and verification against guidelines
  • Revenue-cycle management

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Detailed information

The Medical Coding expert is wired to a coding MCP server with an extended call timeout to accommodate prediction and verification workflows. The general coding-expert calls list_code_systems() first and selects from any supported code system at runtime. For details on the supported code systems and use cases, see the Medical Coding tab.

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Code-system-specific variants

In addition to the general coding-expert, the registry exposes pre-configured variants that lock the expert to a single code system. Use these when you know which system you want to code in and don’t need the expert to discover code systems at runtime.
KeyCode system
coding-expert-icd-10-cmICD-10-CM — US diagnosis coding
coding-expert-icd-10-intICD-10 WHO — international diagnosis coding (uses icd-10-who for search/explore/verify)
coding-expert-icd-10-pcsICD-10-PCS — US inpatient procedure coding
coding-expert-icd-10-ukICD-10-UK — UK diagnosis coding
Each variant shares the same workflows and capabilities documented above.