Sunday, March 28, 2010

Comparison of ICD-9-CM and ICD-10-CM

ICD-10-CM was designed to offer significant advantages over ICD-9-CM. These changes should result in major improvements in both the quality and uses of data for various healthcare settings.

Significant improvements in both the content and the format of ICD-10-CM include the following:

General Changes and Overall Improvements

  • ICD-10-CM codes are alphanumeric and include all letters except "U," thus providing a greater pool of code numbers.
  • ICD-9-CM’s V and E codes are incorporated into the main classification in ICD-10-CM.
  • The length of codes in ICD-10-CM can be a maximum of seven characters (digits and letters) as opposed to ICD-9-CM’s five digits.
  • ICD-10-CM offers the addition of information relative to ambulatory and managed care encounters.
  • Conditions that are new or that were not uniquely identified in ICD-9-CM have been assigned code numbers in ICD-10-CM.
  • In ICD-10-CM, some three-character categories are not used in order to allow for revisions and future expansion.
  • Instead of grouping by categories of injury or type of wound, ICD-10-CM groups injuries by site of the injury and then the type.
  • Excludes notes were expanded in order to provide guidance on the hierarchy of the chapters and to clarify priority of code assignment.
  • Some conditions with a new treatment protocol or perhaps a recently discovered or new etiology have been listed in a more appropriate chapter.
  • Combination codes are used for both symptom and diagnosis, and etiology and manifestations—for example K50.03 Crohn’s disease of small intestine with fistula.
  • Codes for postoperative complications have been expanded. Also a distinction has been made between intraoperative complications and post-procedural disorders—for example, K91 Intraoperative and postprocedural complications and disorders of digestive system, NEC.
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