| MCHC | Madison County Health Coalition 
| Others |
| MCHC | Make Chavs History Campaign
| Others |
| MCHC | Manchester Community Health Center
| Others |
| MCHC | Maternal and Child Health Centre
| Others |
| MCHC | Maternal and Child Health Consortium
| Others |
| MCHC | Maternal Child Health Coalition
| Others |
| MCHC | Mattapan Community Health Center
| Others |
| MCHC | Mean Cell Haemoglobin Concentration
| Others |
| MCHC | Mean Cell Hb Concentration
| Others |
| MCHC | Mean Cell Hemoglobin Concentration
| Others |
| MCHC | Mean Cellular Hemoglobin Concentration
| Others |
| MCHC | Mean Corpuscle Hemoglobin Concentration
| Others |
| MCHC | Mean Corpuscular Haemoglobin Concentration
| Others |
| MCHC | Mean Corpuscular Haemoglobin Content
| Others |
| MCHC | Mean Corpuscular Hemoglobin Concentration
| Others |
| MCHC | Mean Corpuscular Hemoglobin Content
| Others |
| MCHC | Mendocino Community Health Clinic
| Others |
| MCHC | Metropolitan Chicago Healthcare Council
| Others |
| MCHC | Metropolitan Collegiate Hockey Conference
| Others |
| MCHC | Michigan Collegiate Hockey Conference
| Others |
| MCHC | microcrystalline Calcium hydroxyapatite compound
| Others |
| MCHC | Middletown Community Health Center
| Others |
| MCHC | Mitsubishi Celeste Hobby Club
| Others |
| MCHC | Montgomery County Hispanic Chamber
| Others |
| MCHC | Morris County Heritage Commission
| Others |
| MCHC | Mountain Comprehensive Health Corporation
| Others |
| MCHC | Mountainlands Community Health Center
| Others |
| MCHC | Munson Community Health Center
| Others |