Cuomo said the state Department of Health and state Attorney General Letitia James' office would be investigating to see how nursing homes are meeting regulations including alerting all residents and their family members of coronavirus cases and fatalities.
The state's tally of deaths of nursing home residents rose to 2,902 and adult care facilities reported 638 deaths. That was 22 percent of the state death toll.
Nursing homes also must separate, isolate or transfer certain residents with COVID-19 and provide personal protective equipment to staff.
Cuomo said state health officials will inspect non-compliant facilities, which could have to submit an action plan and potentially face $10,000 fines per violation or lose their license.
A dozen nursing homes have reported at least 30 deaths. But such numbers are an undercount, with some nursing homes only reporting presumed or confirmed deaths.
MORE CORONAVIRUS COVID-19 COVERAGE
UPDATES
Grieving the lost: Tri-State residents who have died
New Jersey
Connecticut
New York City
Long Island
RESOURCES
Where are the testing centers
See how our communities are making a difference
Free educational resources for parents and children
How you can help victims of coronavirus
RELATED INFORMATION
Share your coronavirus story with Eyewitness News
Stimulus check scams and other coronavirus hoaxes
Coronavirus prevention: how clean are your hands?
Centers for Disease Control and Prevention on coronavirus
Total count of NYC COVID-19 cases based on patient address