Effective October 1, 2013, ICD-10 (International Classification of Diseases, 10th Edition) will replace ICD-9 (9th Edition) in the United States. The ICD-9 –CM has been in use in the United States for more than 30 years since its birth in 1979 and now has outdated terms, it limit the number of new codes to be created, and is inconsistent with current medical practice. The original intent was to update the system every 10 years. However, these updates never occurred and a major revision is over due.
ICD-10-CM is a US clinical modification of the World Health Organization’s ICD-10 and is maintained by the National Center for Health Statistics (NCHS). It is a morbidity classification system that classifies diagnoses and other reasons for healthcare encounters.
The ICD-10-CM will replace ICD-9-CM diagnoses, which will be used in all types of healthcare settings that currently use an ICD-9-CM diagnosis codes. Diagnosis coding under ICD-10 CM uses 3 to 7 digits instead of 3 to 5 digits used with ICD-9CM. The format of the code sets is similar.
The ICD-10-PCS is a procedural coding system developed under contract by the Center for Medicare & Medicaid Services (CMS) as a replacement of the ICD-9-CM procedural coding system for hospital reporting of inpatient procedures. ICD-10-PCS uses 7 alphanumeric digits instead of the 3 to 4 numeric digits used under ICD-9-CM procedure coding. Coding under ICD-10 PCS is much more specific and substantially different from ICD-9-CM procedure coding.
Physician offices and other Part B providers will only be changing to ICD-10-CM and not to ICD-10-PCS. The CPT and HCPCS will continue to be used for all procedures performed in ambulatory departments, physician and other professional services and other outpatient facilities.
ICD-10 Implementation Compliance Date
- On October 1, 2013, the Centers for Medicare & Medicaid Services (CMS) will implement the ICD-10 CM (diagnoses and ICD-10PCS (inpatient procedures) replacing the ICD–9-CM and procedure code sets
- ICD-9-CM codes will not be accepted for services provided on or after October 1, 2013
- ICD-10 codes will not be accepted for services prior to October 1, 2013
- The compliance dates are firm and not subject to change
Note: There will be no delays and there will be no grace period for implementation