- Machinery, Supplies & Equipment - Construction & Contractor Related, Bartonsville
- Management Consultants & Services, Bartonsville
- Manicurists & Pedicurists, Bartonsville
- Manufacturing, Bartonsville
- Marriage & Family Counselors, Bartonsville
- Massage Therapy, Bartonsville
- Medical & Dental Management, Bartonsville
- Medical Diagnostic Clinics, Bartonsville - Clinical Labs & Centers
- Medical Management & Business Administration Service, Bartonsville
- Medical Supplies & Equipment, Bartonsville
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- Mental Health Specialists, Bartonsville - Psychologist, Psychiatrist, Psychotherapist, etc
- Messenger Service, Bartonsville - Message Receiving & Forwarding Service
- Methodist Church, Bartonsville
- Mining, Bartonsville
- Miscellaneous Business Product Repair, Bartonsville
- Miscellaneous Government, Bartonsville
- Miscellaneous Professional, Bartonsville
- Mortgage Bankers & Correspondents, Bartonsville
- Motor Vehicle, Bartonsville
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