(SANDUSKY) -- Two physician offices through McKenzie Health System have been recognized for their high immunization rates by the Region 4 Michigan Care Improvement Registry. The McKenzie Croswell Clinic has met the criteria to be recognized as a Site of Excellence for March 2014 and McKenzie's Austin Street Clinic has received Honorable Mention. Region 4 first introduced their revised criteria to recognize providers as Site of Excellence in the fall of 2013. Providers are evaluated in March and September for meeting an immunization rate of 85% or higher in three distinct areas. Honorable Mention is given for providers who reached 85% or better for two criteria and were close for the third. Region 4 is comprised of Bay, Genesee, Huron, Lapeer, Midland, Saginaw, Sanilac, Shiawassee, and Tuscola Counties.