I believe the New York City Department of Health and Mental Hygiene has regulatory authority over healthcare providers within the City of New York.

Their 2020 Advisory #8 COVID-19 Update for New York City [1] directed towards healthcare providers states in the summary that "Outpatient testing must not be encouraged, promoted or advertised."

Additionally, "To preserve PPE for HCW providing medically necessary care for hospitalized patients, the NYC Health Department is directing healthcare facilities to IMMEDIATELY STOP TESTING NON-HOSPITALIZED PATIENTS FOR COVID-19 unless test results will impact the clinical management of the patient. In addition, do not test asymptomatic people, including HCWs or first responders. COVID-19 testing is only indicated for HOSPITALIZED PATIENTS."

[1] https://www1.nyc.gov/assets/doh/downloads/pdf/han/advisory/2...