Where can one find ICD 9 diagnosis codes?

There are several resources where one can find ICD 9 diagnosis codes:

1. The International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) Official Website: This is the official website maintained by the Centers for Disease Control and Prevention (CDC) where you can access the complete ICD-9-CM code set, including diagnosis codes.

2. Medical Coding Books and Manuals: Many publishers offer medical coding books and manuals that contain ICD-9 diagnosis codes. These books may include additional information such as code descriptions, guidelines, and examples.

3. Online Medical Coding Resources: There are several online resources that provide access to ICD-9 diagnosis codes. Some examples include:

- The American Academy of Professional Coders (AAPC) website

- The Centers for Medicare & Medicaid Services (CMS) website

- ICD9data.com

4. Software Programs: Some medical coding software programs include built-in ICD-9 code libraries. These programs may also provide additional features such as code search and validation.

It's important to note that the ICD-9 coding system has been replaced by the ICD-10 coding system as of October 1, 2015. However, ICD-9 codes may still be required for certain purposes, such as historical data analysis or reimbursement for services provided before the transition date.