ICD-10-CM/PCS (International Classification of Diseases, 10th Edition, Clinical Modification/Procedure Coding System) consists of two parts: ICD-10-CM for diagnosis coding & ICD-10-PCS for inpatient procedure coding. Diagnosis coding under ICD-10-CM uses 3 to 7 digits instead of the 3 to 5 digits used with ICD-9-CM, but the format of the code sets is similar. The transition to ICD-10 is occurring because ICD-9 produces limited data about patients’ medical conditions and hospital inpatient procedures. ICD-9 is 30 years old, has outdated terms, and is inconsistent with current medical practice. Also, the structure of ICD-9 limits the number of new codes that can be created, and many ICD-9 categories are full. ICD-10 will affect diagnosis and inpatient procedure coding for everyone covered by Health Insurance Portability Accountability Act (HIPAA), not just those who submit Medicare or Medicaid claims. The change to ICD-10 does not affect CPT coding for outpatient procedures.
CMS ICD-10 Resources
CDC ICD-10-CM (Clinical Modification)
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