Reference

Choose the reference that matches your task. Start with an index term, verify the Tabular entry, then read the applicable coding instructions.

ICD-10-CM · FY2027Official sources

Tabular List

Browse all 22 chapters and follow the hierarchy from a code range to a complete diagnosis code.

Alphabetic Index

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External Causes Index

Explore references for the circumstances, mechanisms and causes of injuries.

Table of Drugs & Chemicals

Find substance references for poisoning, adverse effects and underdosing.

Table of Neoplasms

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Official Coding Guidelines

Read the published conventions, general guidelines and chapter-specific instructions.

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Code checker

Check whether up to 100 codes exist in the selected edition.

Release updates

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Saved codes

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Official code titles and instructions remain in English. Code checks confirm the reference entry; they do not assess clinical documentation or payer coverage.