Appendix A: ICD-10-CM Official Guidelines for Coding and Reporting*

These guidelines, developed by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS) are a set of rules developed to assist medical coders in assigning the appropriate codes. The guidelines are based on the coding and sequencing instructions from the Tabular List and the Alphabetic Index in ICD-10-CM.

These guidelines are for medical coders who are assigning diagnosis codes in a hospital, outpatient setting, doctor’s office or some other patient setting. The guidelines for coding Neoplasms are below. These can be found in the ICD-10-CM Official Guidelines for Coding and Reporting at ICD-10 Files & News Archive | CMS.

Updated: December 3, 2018