health care: Style Guide Spelling Decisions (AP, Chicago, MLA, APA)

How major style guides rule on "health care"

AP keeps the noun open and hyphenates the adjective; Merriam-Webster accepts the closed form 'healthcare', which has become dominant in industry usage.

The disagreement on "health care" is an example of whether a compound is open, hyphenated, or closed, the category of style-guide differences that most often confuses copy editors and creates inconsistency across long documents. Below is a guide-by-guide breakdown, drawn directly from the published editions cited.

What the divergence actually means

Unlike many compound-modernization decisions where style guides eventually converge, "health care" continues to show genuine divergence between major guides. The AP Stylebook treats this as a settled call; Chicago Manual leaves more flexibility; and Merriam-Webster, as a descriptive dictionary, records both forms. Source: Chicago Manual of Style, 17th Edition

The APA Publication Manual diverges here: it specifies "health care" as the form preferred for academic writing in psychology and behavioral-science journals. APA's reasoning typically tracks scientific publishing conventions rather than newspaper-style economy. Source: APA Publication Manual, 7th Edition

Merriam-Webster lists "health care or healthcare", which serves as the lexicographic baseline for U.S. style decisions. Because Merriam-Webster's entries reflect aggregated published usage rather than editorial preference, when a guide says "follow Merriam-Webster", as APA does, that effectively delegates the call to whichever spelling has dominated the published corpus. Source: Merriam-Webster Dictionary

Garner's Modern English Usage classifies the "health care (n.) / health-care (adj.)" / "healthcare" pair on its Language-Change Index, a five-stage scale measuring whether a once-disputed form has been accepted into Standard English. For whether a compound is open, hyphenated, or closed, Garner's typically rates the dominant form at Stage 4 ("ubiquitous but objected to by traditionalists") or Stage 5 ("fully accepted"). Source: Garner's Modern English Usage, 5th Edition

Practical guidance for editors

For working writers, the practical rule is straightforward: in journalism, follow AP; in academic writing in the humanities, follow MLA or Chicago; in social-science publishing, follow APA; in book publishing, follow Chicago. When no house style applies, Merriam-Webster's main entry is the safest default. The differences across these guides on "health care" reflect not disagreement about correctness but different audiences and editorial pressures.

Editorial context

In medical and health insurance contexts, the closed form "healthcare" persists as the prevailing variant, embedded in trade nomenclature and professional communications that predate many style guide rulings. Entities like UnitedHealthcare, Cigna Healthcare, and the federal Healthcare.gov marketplace exemplify this, treating "healthcare" as a unitary industry term denoting an economic sector rather than discrete services. This register-specific convention, surging alongside managed care in the 1970s, appears in specialized journals and reports, such as Healthcare executives prioritize digital transformation amid regulatory changes., where the compound efficiently signals insider familiarity. Generalist copy editors, encountering source material from these fields, often propagate the fused spelling into broader journalism, creating friction with AP's open-noun/hyphenated-adjective paradigm despite Merriam-Webster's nod to both. Such industry dominance illustrates how subfield norms challenge universal editorial standards, demanding context-aware decisions.

Cross-references

For the dictionary entry, frequency data, and pronunciation of health, see the main word page. For other style-guide spelling decisions in this category, browse all style-guide spelling rulings.