Atypical Code Conversion Project

Please note:
The W-Code list has been revised effective 5/20/13. The conversion code for W2504 has been changed. The list has been reformatted for easier use.

In accordance with direction from the Centers of Medicare and Medicaid Services (CMS), the Iowa Medicaid Enterprise (IME) has completed a project converting all service codes that begin with a "W" to standardized codes. These "W" codes were previously used to bill waiver, habilitation, case management, and targeted case management services to the IME. This conversion affects the Individualized Services Information System (ISIS), Notices of Decision (NOD), and claims billed to the IME. This transition is effective for dates of service on or after July 1, 2013. Billing for dates of service prior to July 1, 2013, will still require the “W” code.

Other related Informational Letters (IL) regarding this project:

If you have any questions about the Atypical code Conversion Project, please contact Le Howland at