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ICD-10 replaces ICD-9 and reflects advances in medicine and medical technology over the past 30 years. ... Doctors and hospitals use ICD codes to classify diseases, illnesses and injuries, and insurance companies use this information to process claims.

Hence, the basic structural difference is that ICD-9 is a 3-5 character numeric code while the ICD-10 is a 3-7 character alphanumeric code. The documentation of ICD-10 is much more specific and detailed as compared to ICD-9.

The International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) is based on the World Health Organization's Ninth Revision, International Classification of Diseases (ICD-9).

The transition from ICD-9 to ICD-10 is occurring for the following reasons: ICD-9 codes have limited data about the patient's medical conditions and hospital inpatient procedures. ICD-9 codes use outdated and obsolete terms and are not consistent with current medical practices.

CMS requires medical practices and RCM companies to make the switch from ICD-9 to ICD-10 by October 1, 2015, the last day for ICD-9 being September 30, 2015. This is not new. Organized, managed, and maintained by the World Health Organization, ICD codes are changed approximately once every 10 years.

ICD-9 follows an outdated 1970's medical coding system which fails to capture detailed health care data and is inconsistent with current medical practice. By transitioning to ICD-10, providers will have: Improved operational processes by classifying detail within codes to accurately process payments and reimbursements.

ICD-10-CM is a seven-character, alphanumeric code. Each code begins with a letter, and that letter is followed by two numbers. The first three characters of ICD-10-CM are the category. The category describes the general type of the injury or disease. The category is followed by a decimal point and the subcategory.

CMS requires medical practices and RCM companies to make the switch from ICD-9 to ICD-10 by October 1, 2015, the last day for ICD-9 being September 30, 2015. This is not new. Organized, managed, and maintained by the World Health Organization, ICD codes are changed approximately once every 10 years.

ICD-9-CM Code 202.0 to ICD-10-CM As of October 2015, ICD-9 codes are no longer used for medical coding.