The California Department of Health Care Services (DHCS) did not convert from ICD-9 to the ICD-10 coding system by the federally mandated October 1, 2015, conversion date.

DHCS has received approval from the Centers for Medicare and Medicaid Services (CMS) to take incoming claims coded with ICD-10 codes and convert them back to ICD-9 using a crosswalk in order to calculate payments. DHCS reports the crosswalk is a temporary workaround until the department is able to transition to a new claims processing system. Physicians should continue to submit ICD-10 codes.

The California Medical Association (CMA) has requested that DHCS share more information, including how it plans to remedy any errors that are the result of the crosswalk, as well as the anticipated timeline for full ICD-10 implementation in the new claims processing system.

CMA will be monitoring the issue closely and will be in close contact with DHCS staff in the event any problems arise.

Practices that experience Medi-Cal related claim issues are encouraged to call Medi-Cal’s telephone service center at (800) 541-5555. For problems relating to global ICD-10 issues, contact the DHCS ICD-10 mailbox at

ICD-10 Resources

ACCMA’s free comprehensive training program, “Charting a Path” to ICD-10, includes numerous resources to assist physicians and their practices continue to navigate the transition to ICD-10. For a full list of available resources click here or go to

CMA has a number of ICD-10 resources available to members, including a new FAQ, "Surviving ICD-10: An FAQ for Physician Practices," which can be found at

For questions or assistance accessing the above resources, contact the ACCMA at 510-654-5383 or