County Medical Services Program Billing Reminder

September 8, 2021

As of October 1, 2005, the Department of Health Care Services (DHCS) no longer administers the County Medical Services Program (CMSP). All claims for CMSP services submitted to Medi-Cal after September 30, 2005, are denied.

Contact Advanced Medical Management (AMM) at 1-877-589-6807 for information on CMSP medical claims. Contact MedImpact at 1-800-788-2949 for information on CMSP pharmacy claims.

Some CMSP information is retained and updated in Medi-Cal provider manuals because verification of CMSP eligibility, including share of cost, is still provided by Medi-Cal. Updated CMSP information is also reflected in user guides, Remittance Advice Details (RAD) code messages and the FAQs page of the Medi-Cal provider website.

Information on CMSP is available on the CMSP Governing Board’s website.