There are six key differences between ICD-9 and ICD-10 diagnosis codes:

Quantity: ICD-10 has almost 9x as many codes as ICD-9. ICD-9 has approximately 13,000 codes whereas ICD-10 has 68,000. In addition, ICD-10 codes are alphanumeric whereas ICD-9 codes contain numbers only.

Specificity: ICD-10 codes allow providers to provide detail such as cause, anatomic site, severity, and type of encounter such as initial, subsequent, or sequela.

Laterality: ICD-10 codes allow providers to indicate which side of the body treatment was provided to such as left knee, right hand, etc.

Growth: ICD-9 has been used for nearly 40 years and during that time, new diagnoses have been discovered and new technologies adopted. ICD-9 is maxed out but ICD-10 provides the flexibility to change and grow as needed.

Terminology: The terminology used in ICD-9 has been updated to reflect modern practices.

Multiple Diagnoses: Providers can code multiple diagnoses using one code reducing the need for sequencing.
Will the expanded code set help your practice better code medical claims?