The Mass HIway is connected to the following HISPs:

1. Allscripts (MedAllies HISP)14. MaxMD
2. Aprima15. MatrixCare
3. ASP.MD16. McKesson (RelayHealth)
4. Athenahealth17. Medicity
5. CareAccord18. MyHealthProvider (Mercy Hospital)
6. CareConnect (NetSmart HISP)19. NextGen Share
7. Cerner20. NHHIO
8. DataMotion21. PCE Systems
9. eClinicalWorks22. SES
10. eClinicalWorks Plus23. Surescripts
11. eLINC24. UpDox
12. EMR Direct25. Wellport (Lumira HISP)
13. Inpriva 

The Mass HIway is currently connected to, or in the process of connecting to, the following vendors:

Advanced Data SystemsEaglesoft ClinicianLMRRemarkable Health
AllscriptseClinicalWorksLytec MD (McKesson)SEE
Amazing ChartseHanaMatrixSiemens
AMSEMA Modernizing MedicineMatrixCareSigmacare
ASPMDEnciteMedflowSoarian (Cerner)
AthenahealthEpicMeditechSpring Charts
BayCISGEMednet Medical (EMR4MD)Suncoast Solutions
Care At HandgEHRiMedNetsmartSurescripts
Care360 (Quest)GreenwayNextechUnitcare
CernerHealthWyseOffice PracticumWebOMR
ComChartHermesIQPhysician's Computer CompanyZoll
CompulinkHomeCarePoint Click Care 
CPSIHomecare HomebasePoint N Click 
CredibleHomegrownPractice Fusion 
Delta (Encore product)icanotesPractice Partners 
DentrixImprevaPractice Perfect