Should health care be spelled as two words?
The MLA primarily follows Merriam-Webster’s Collegiate Dictionary for spelling, so we spell health care as two words when it is used as a noun, and we hyphen it as an adjective—for example, health-care costs (“Health Care”). Other publishers may follow other dictionaries and spell healthcare as one word in both noun and adjective forms. As always, whichever form you choose, be consistent throughout your paper.
“Health Care, N.” Merriam-Webster Unabridged, 2018, unabridged.merriam-webster.com/collegiate/health%20care.