What does MHH stand for?

Mandala Holistic Health - Defunct (EA)

Marine Technical Service, Tacoma, WA - Manufacturer code for watercraft hull identification number (USCG)

Marsh Harbour - Bahamas - Airport symbol (OAG)

Maskoy Pidgin - Language code (ETLW)

Math Homework Helpers - Education

Medicaid Hold-Harmless - Health care