Commonwealth of Massachusetts MassHealth Provider Manual Series Subchapter Number and Title Table of Contents Page vi Transportation Manual Transmittal Letter TRN-32 Date 07/01/10 6. Service Codes and Descriptions Dial-a-Ride Services 6-1 Taxi Services . 6-1 Wheelchair Van Services 6-1 Ambulance Services . 6-2 Other Licensed Carriers 6-2 Appendix A. Directory A-1 Appendix B. Enrollment Centers B-1 Appendix C. Third-Party Liability Codes C-1 Appendix W. EPSDT Services: Medical and Dental Protocols and Periodicity Schedules W-1 Appendix X. Family Assistance Copayments and Deductibles X-1 Appendix Y. EVS Codes/Messages Y-1 Appendix Z. EPSDT/PPHSD Screening Services Codes Z-1