2023 Update to Diagnosis Codes Is Substantial

2023 Update to Diagnosis Codes Is Substantial

Exactly 1,468 new diagnosis codes will be added to the ICD-10-CM code set for fiscal year (FY) 2023. Moreover, 251 codes will be deleted, 35 code descriptors will be revised, and 36 codes will be converted to parent codes. The changes go into effect Oct. 1.

Review the Latest Files

The diagnosis code files and guidelines are available on the Center’s for Medicare & Medicaid Services’ (CMS’) 2023 ICD-10-CM web page. Downloads are:

  • 2023 Conversion Table
  • 2023 Code Descriptions in Tabular Order
  • 2023 Addendum
  • 2023 Code Tables, Tabular and Index
  • FY 2023 ICD-10-CM Coding Guidelines

These are ZIP folders containing multiple files; many of the files contain the same information in multiple formats.

Compare New and Old Diagnosis Codes

In the 2023 Conversion Table folder, for example, there are two files that contain the same information, but one is an Excel worksheet and the other is comma-separated per Section 508 accessibility standards. The conversion table shows diagnosis coding changes. For example, as shown in Figure A, the table shows us that, beginning Oct. 1, instead of Z72.89 Other problems related to lifestyle we should report either F10.90 Alcohol use, unspecified, uncomplicated or F10.91 Alcohol use, unspecified, in remission, depending on the healthcare provider’s documentation.

Figure A: The Conversion Table shows new coding for 2023.

conversion table

See What’s Changed

A review of the files in the 2023 Addendum folder lets us see what exactly is changing in the Table of Drugs and Chemicals, Index, Table of Neoplasms, and Tabular List. The Tabular List addenda really puts things into perspective. In this file, we can see that every chapter except Chapter 7: Diseases of the Eye and Adnexa (H00-H59) and Chapter 8: Diseases of the Ear and Mastoid Process (H60-H95) has revisions and to what extent. For example, Chapter 12: Diseases of the Skin and Subcutaneous Tissue (L00-L99) has only one change to an Excludes1 note for L81 Other disorders of pigmentation.

Look for a review of diagnosis code changes throughout ICD-10-CM for FY 2023 in the September issue of Healthcare Business Monthly.

Medical coding books

Renee Dustman
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Renee Dustman, BS, AAPC MACRA Proficient, is managing editor - content & editorial at AAPC. She holds a Bachelor of Science degree in Media Communications - Journalism. Renee has more than 30 years' experience in journalistic reporting, print production, graphic design, and content management. Follow her on Twitter @dustman_aapc.

8 Responses to “2023 Update to Diagnosis Codes Is Substantial”

  1. Heather says:

    If we take the CPC exam in October, will using our 2022 code books still suffice?

  2. Annette John says:

    When can we order the new books for 2023

  3. Renee Dustman says:

    2022. Exams are updated Jan. 1 each year.

  4. Shalene Petrich says:

    Where can I find the list of deleted/ revised codes? I can only find a list of new codes

  5. Keaira Thomas says:

    So if we take the CPC exam anytime this year we are good to use our current book for 2022? I don’t plan on taking my CPC exam until December 2022.

  6. Renee Dustman says:

    Yes, the exam will be based on 2022 CPT in all of 2022.

  7. Renee Dustman says:

    You can download all the ICD-10-CM code files from here https://www.cms.gov/medicare/icd-10/2023-icd-10-cm

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