The ICD-9 code sets used to report medical diagnoses and inpatient procedures has been replaced by ICD-10 code sets on October 1, 2015.

ICD-10 consists of two parts:

  • ICD-10-CM diagnosis coding which is for use in all U.S. health care settings.
  • ICD-10-PCS inpatient procedure coding which is for use in U.S. hospital settings.

ICD-10 affects diagnosis and inpatient procedure coding for everyone covered by the Health Insurance Portability Accountability Act (HIPAA), not just those who submit Medicare or Medicaid claims:

  • Claims for services provided on or after October 1, 2015 should be submitted with ICD-10 diagnosis codes.
  • Claims for services provided prior to October 1, 2015 should be submitted with ICD-9 diagnosis codes.

The change to ICD-10 did not affect CPT coding for outpatient procedures.


ICD10 Specialty Quick Reference Guides

whaWHIMA, in collaboration with the Wisconsin Healthcare Association, encourage use of documentation reference guides developed by an ICD-10 expert for your ICD-10 transition. They have been utilized by practicing physicians and were found to be functional and effective.

Please visit WICD10 for these guides and a podcast by Chuck Shabino, MD, WHA Chief Medical Officer, explaining the steps for successful conversion to ICD-10.