ICD 9 & 10
The International Classification of Diseases, Tenth Revision (ICD-10) was endorsed in 1990 and came into use in World Health Organization (WHO) member states in 1994. Despite the fact it is now almost twenty years old, transition from ICD-9 to ICD-10 is still far from complete. The HIPAA deadline of October 1, 2013 for the transition from ICD-9 to ICD-10 encoding is for hospital treatment inpatient procedures only, and is summarized in this PDF. This change does not directly affect Current Procedural Terms (CPT) coding for outpatient procedures. Despite this exemption for ambulatory care, integrated treatment plans will increasingly require ICD-10 use by most health care providers.
ICD-10 is intended to be inclusive and exhaustive, covering all possible diseases and nature of injury, the external causes of injury, as well as providing a table of drugs and chemicals, and lists of cause-of-death. Whereas ICD-9-CM contains more than 17,000 codes, for example, ICD-10 contains more than 141,000 codes and accommodates a host of new diagnoses and procedures. This drastic increase in diagnostic and procedural codes will present a significant challenge for health care providers.
ICD-10 is specific enough to not only serve as an exhaustive diagnostic and treatment library, but if adhered to properly, to form the basis for a common XML integration of a computer database schema, allowing easier EMR interoperability of data.
Standards implementations often interlock, and the required use of ANSI 5010 as of January 1, 2012 in transmitting claims information is a prerequisite to meeting the ICD-10 claims formatting deadline of October 1, 2013, since the current HIPAA transaction standards cannot support the ICD-10 code formats.