About the ICD-9 to ICD-10 Mapping Tool

The following information provides instructions and important details related to ASHA's ICD-9-CM (International Classification of Diseases, 9th Edition, Clinical Modification) to ICD-10-CM (10th Edition) mapping tool for audiologists and speech-language pathologists.

How It Works

This tool is tailored for audiologists and speech-language pathologists who need to map current ICD-9-CM codes to the new ICD-10-CM codes. ICD-9-CM codes must be entered one by one and to the highest level of specificity possible. As an ICD-9-CM code is entered, the tool will display a dropdown menu with a list of the possible codes that are available for mapping. The selection of codes will narrow as you continue to enter the code to higher levels of specificity. Once an ICD-9-CM code is selected or entered, the ICD-10-CM mapping results will be displayed on the page below the search box.

Understanding the Results

Each ICD-9 to ICD-10 mapping result is based on detailed analysis by ASHA staff and will contain either a one-to-one (direct) mapping or mappings to multiple ICD-10-CM codes. Note that mappings to multiple codes are displayed in alpha-numeric order and are not rank ordered in any way. When multiple mappings are possible, additional clinical analysis will be required to determine which code(s) should be selected for your particular situation.

The results will always include the primary descriptor, in bold, for each of the ICD-10-CM codes. Sometimes, the ICD-10-CM codes may also include secondary descriptors (displayed in bulleted format), coding instructions (e.g., exclusions), or additional information (e.g., links to useful resources). In most cases, the ICD-10-CM information displayed in the results is not as comprehensive as what is published in the official ICD-10-CM Tabular List of Diseases Injuries [ZIP].

If your search produces a "No Results Found" message, please verify the ICD-9-CM code or check the list of ICD-10-CM codes for audiologists [PDF] or speech-language pathologists [PDF]. Here are some reasons you may not be able to find a result:

  • The ICD-9-CM code was not entered to the highest level of specificity.
  • The code is not commonly related to conditions treated by audiologists or speech-language pathologists.
  • An ICD-9-PCS (Procedure Coding System) code was entered. This tool is only for ICD-9-CM ( Clinical Modification) mappings.
  • An ICD-10 code was entered. This tool does not provide backwards mappings (ICD-10 to ICD-9).

Still can't find what you're looking for? Let us know.

How We Developed Our Mappings

ASHA analyzed the General Equivalency Mappings (GEMS) developed by the Centers for Medicare and Medicaid Services (CMS) and the Centers for Disease Control (CDC) and other resources to apply the appropriate mappings for audiology and speech-language pathology related diagnoses. GEMS were developed as a tool to assist with the conversion from ICD-9-CM codes to ICD-10-CM. The GEMS are forward and backward mappings between ICD-9 and ICD-10 and are also referred to as crosswalks. However, in some instances, there is not a translation between an ICD-9 code and an ICD-10 code, which is noted with a "No Map" flag indicator.


Clinical Modification (CM) versus Procedure Coding System (PCS): The clinical modification for both the ICD-9 and ICD-10 coding systems (i.e., ICD-9-CM and ICD-10-CM) was developed by the Centers for Disease Control and Prevention for use in all U.S. health care treatment settings. The procedure coding system (i.e., ICD-9-PCS and ICD-10-PCS) was developed by the Centers for Medicare and Medicaid Services for use in the U.S. for inpatient hospital settings only. This tool only includes clinical modification codes.

Excludes Notes: The ICD-10-CM has two types of excludes notes. Each type has a different definition for use, but both indicate that excluded codes are independent of each other.

  • Excludes1: A type 1 excludes note is a pure excludes and indicates that the code excluded should never be used at the same time as the code above the excludes1 note. An excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Excludes2: A type 2 excludes note represents Not included here. An excludes2 note indicates that the condition excluded is not part of the condition from which it is excluded, however, a patient may have both conditions at the same time. When an excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together.

Highest level of specificity: This means the maximum number of digits for the code being used. For example, the ICD-9-CM code for voice and resonance disorders begins with 784.4. However, if you submit a claim with the diagnosis 784.4, it will be denied because it requires a fifth digit, such as 784.41 (aphonia).


ASHA Corporate Partners