The phrase "expand its coverage" is correct and usable in written English.
You could use it whenever you need to describe an action involving increasing the scope of something. For example, "The insurance company decided to expand its coverage to include a broader range of services."
As the NHIS seeks to expand its coverage, it can consider granting accreditation to alternative medicine practitioners who have been approved to practice by the Ministry of Health in view of the growing importance of that sub-sector in Ghana's health delivery system [ 45].
In June, it will expand its coverage to include San Francisco, Chicago, Philadelphia, Dallas and Miami.
Ianalyst's initial focus will be on technology stocks, though it will expand its coverage to other areas as more analysts are hired, Mr. Albano said.
This year it's intending to expand its coverage footprint for this home-visit service in a bid to scale demand.
Channel 4 said it was "clearing the schedules" to expand its coverage further, moving its only remaining block of afternoon non-Paralympics programming to More4, such had been the viewing figures and reaction to its coverage.
Continuing its program to expand its coverage, The Wall Street Journal announced yesterday that it will add a new Thursday page, Technology Journal, which will be devoted to technology business news and is set to begin on Feb. 12.
Today it expanded its coverage to London with deals on a selection of 20 properties.
From the beginning, The Huffington Post also provided news updates, and in mid-2007 it expanded its coverage to include business and entertainment.
While it expands its coverage of policy and politics, the company will refocus National Journal on membership services.
Since then, it has expanded its coverage around the world (the best coverage, though, is currently in the U.S. and Western Europe).
Caracas lost one of its Russian fighters this year during an anti-trafficking mission, and the Venezuelan government now says it's expanding its coverage to also patrol the skies above Bolivia.
