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Pennsylvania Medicaid (DHS)·PA · Pathology·Provider Bulletin
Effective date
Dec 1, 2005
We identified it
Jun 20, 2026
Summary
Pennsylvania Medical Assistance (Medicaid) is replacing local laboratory procedure codes with national HIPAA-compliant codes effective December 1, 2005. Providers must use the new national codes and modifiers or face claim denials.
Action Required
By December 1, 2005: Billing team must update billing system to replace all end-dated local Z-codes with corresponding national procedure codes and required modifiers per the crosswalk spreadsheet. Update encounter forms and staff training materials. Failure to use correct national codes will result in claim denials or inappropriate payments.