Tip: ICD9 or ICD10 designation

Diagnosis Codes

To verify if diagnosis codes provided in fields MC041 through MC053 are ICD9 or ICD10 and are valid, join the values in these fields to the ICD9 and ICD10 reference files located at the downloadable reference table link on the Arkansas APCD Data Dictionary page.  This link will provide a zipped file containing text files supporting key Arkansas APCD data elements including diagnosis codes.  The ICD diagnosis reference files within the downloadable ZIP file are:

• DWB1673_ICD9CM_DIAG_2022_07_20.txt
• DWB1673_ICD10CM_DIAG_2022_07_20.txt

Those codes that match the ICD9 reference file are ICD9 diagnosis codes. Those codes that match the ICD10 reference file are ICD10 diagnosis codes.

732 ICD diagnosis codes can be found on both the ICD9 and ICD10 reference files.  These are not interchangeable as they have different definitions.  When determining if an ICD code that is found on both tables is an ICD9 or ICD10 code, refer to the field MC915A on the claim record.  If the value in MC915A = 0, treat the value as an ICD10 diagnosis code. If the value in MC915A = 9, treat the value as an ICD9 diagnosis code.

The reference file contains the diagnosis codes found in both ICD9 and ICD10 code sets is also available:

• DWB1673_ICD_DIAG_OVERLAP_2022_07_20.txt

Procedure Codes

To verify if procedure codes provided in fields MC058 through MC058L are ICD9 or ICD10 and are valid, join the values in these fields to the ICD9 and ICD10 reference files located at the downloadable reference table link on the Arkansas APCD Data Dictionary page.  This link will provide a zipped file containing text files supporting key Arkansas APCD data elements including procedure codes.  The ICD procedure reference files within the downloadable ZIP file 

• DWB1673_ICD9CM_PROC_2022_07_20.txt
• DWB1673_ICD10CM_PROC_2022_07_20.txt

Those codes that match the ICD9 reference table are ICD9 procedure codes. Those codes that match the ICD10 reference table are ICD10 procedure codes.

44 ICD procedure codes can be found on both the ICD9 and ICD10 reference files.  These are not interchangeable as they have different definitions.  When determining if an ICD code that is found on both tables is an ICD9 or ICD10 code, refer to the field MC915A on the claim record.  If the value in MC915A = 0, treat the value as an ICD10 procedure code. If the value in MC915A = 9, treat the value as an ICD9 procedure code.

The reference file contains the procedure codes found in both ICD9 and ICD10 code sets is also available:

• DWB1673_ICD_PROC_OVERLAP_2022_07_20.txt