Frequently Asked Questions for Code Sets

• For questions on MHS Direct Care coding, you may find additional information by emailing the MHS Medical Coding Program Office
• For questions on coding submissions to the TRICARE Health Plan, you may find additional information by reaching out to the applicable TRICARE Regional Contractor
  • Humana Military for the TRICARE East Region
  • Health Net Federal Services for the TRICARE West Region

The World Health Organization (WHO), a specialized agency of the United Nations, owns and publishes the ICD code sets (including ICD-10).

Interested parties may find ICD-10 code list file(s) here:

CM: 2018 ICD-10-CM and GEMs

PCS: 2018 ICD-10-PCS and GEMs

By using standardized code sets, providers across the nation can easily and efficiently communicate with one another in order to serve patients and conduct administrative transactions.  In other words, the use of standardized code sets improves the interoperability of health care payers and providers by normalizing the “language” that is used.