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- ICD-10-CM Official Guidelines for Coding and Reporting
The ICD-10-CM Official Guidelines for Coding and Reporting identify which codes maybe assigned as principal or first-listed diagnosis only, secondary diagnosis only, or principal first-listed or secondary (depending on the circumstances)
- ICD-10-CM Guidelines April 1 2023 FY23
ICD-10-CM Official Guidelines for Coding and Reporting FY 2023 -- UPDATED April 1, 2023 (October 1, 2022 - September 30, 2023) Narrative changes appear in bold text Items underlined have been moved within the guidelines since the FY 2022 version Italics are used to indicate revisions to heading changes
- Free 2025 ICD-10-CM Codes
2025 ICD-10-CM Codes A00-B99 Certain infectious and parasitic diseases C00-D49 Neoplasms D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism E00-E89
- ICD-10 Version:2019
ICD-10 Online contains the ICD-10 (International Classification of Diseases 10th Revision)
- ICD List – Trusted 2025 ICD-10-CM PCS Code Lookup
ICD List is a free 2025 resource for ICD-10-CM and ICD-10-PCS codes Includes DRG groupers, Medicare edits, coding rules, and more, all in one tool
- ICD-10-CM Files | Classification of Diseases, Functioning . . .
The documents below are International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) files released since October 2019 Most files are available for download in PDF and XML file formats Older files are provided in the CDC Archive
- ICD-10 Cheat Sheet: DIY for Physicians | Solventum
A PDF of the ICD-10-CM codebook is available free for download from the CDC website Choose the second link that says PDF format, and download the files at that link
- The Webs Free 2025 ICD-10-CM PCS Medical Coding Reference
ICD10Data com is a free reference website designed for the fast lookup of all current American ICD-10-CM (diagnosis) and ICD-10-PCS (procedure) medical billing codes The 2025 ICD-10-CM PCS code sets are now fully loaded on ICD10Data com 2025 codes became effective on October 1, 2024, therefore all claims with a date of service on or after this date should use 2025 codes
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