- HIS-25: Regulation and Subchapter 6 Updates
- HIS-24: Changes to Program Regulations and Service Codes and Descriptions (PDF)
- HIS-23: Changes to Program Regulations and Service Codes and Descriptions (PDF)
- HIS-22: Changes to Service Codes and Descriptions; Clarification of Certain Billing Procedures (PDF) file size 4MB
- HIS-21: Changes to Program Regulations (PDF)
- HIS-20: Changes to Program Regulations and Service Codes (PDF)
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