Introduction: Two Clocks in One City
New York City healthcare facilities run continuity on two clocks at once. The first is regulatory and precise: when a cybersecurity incident is determined to have occurred, the facility owes the New York State Department of Health a notification as promptly as possible, and no later than 72 hours after that determination. The second clock is meteorological and imprecise: the interval between the city and the next coastal storm capable of putting East River water into a hospital basement. A continuity program that only manages one of these clocks is, in New York, half a program.
This article is a local-resilience audit for New York City healthcare operators: what the state’s hospital cybersecurity regulation actually requires, what Hurricane Sandy put on the public record about flood continuity, and what a facility in the five boroughs must be able to show — to a surveyor, to its board, and to itself — before either clock runs out.
The 72-Hour Clock: What 10 NYCRR 405.46 Requires
On October 2, 2024, the New York State Department of Health published a cybersecurity regulation for general hospitals licensed under Article 28 of the Public Health Law, codified at 10 NYCRR 405.46. It is the first state rule of its kind aimed specifically at hospitals, and it borrows its architecture from both HIPAA and the New York Department of Financial Services cybersecurity regulation that banks and insurers already live under.
The reporting duty came first and took effect immediately, on publication. The rest of the regulation took effect one year later, on October 2, 2025. The structure matters for continuity planning, because the regulation does not treat cybersecurity as an information-technology problem. It treats it as an operational one — enforced under the same Public Health Law framework the Department uses for life safety, infection control, and emergency preparedness deficiencies.
What counts as reportable. The regulation distinguishes a “cybersecurity event” — a broad category that includes unsuccessful attempts to gain unauthorized access — from a “cybersecurity incident,” which is what triggers the 72-hour clock. A cybersecurity incident is an event that: (i) has a material adverse impact on the normal operations of the hospital; (ii) has a reasonable likelihood of materially harming any part of the hospital’s normal operations; or (iii) results in the deployment of ransomware within a material part of the hospital’s information systems. The distinction is the continuity-relevant part: most events are noise to be logged and investigated, but an incident is defined by its effect on operations, not by its technical sophistication. A mundane failure that materially degrades operations can be an incident; a sophisticated intrusion that touches nothing material may not be.
The program around the clock. As of October 2, 2025, covered hospitals must maintain: a cybersecurity program designed around an at-least-annual risk assessment of the confidentiality, integrity, and availability of nonpublic information; a designated chief information security officer, who may be employed through a third party; testing and vulnerability assessment of the program; an incident response plan; cybersecurity policies addressing the regulation’s listed topics, including access controls and disaster recovery; audit trails and systems capable of detecting and responding to events, with related records retained for a minimum of six years; multi-factor authentication for access to information systems; and oversight of third-party service providers, including the incidents that happen on a vendor’s systems rather than the hospital’s own. The 72-hour notification does not replace a hospital’s other duties — HIPAA breach notification, the state SHIELD Act, and, for entities also regulated by the Department of Financial Services, its 72-hour rule all continue to run on their own tracks.
For the continuity manager, the operational consequence is this: the determination that an incident has occurred is now a governed decision with a regulatory deadline attached. Who in the building is empowered to make that determination at 3 a.m., on what evidence, and through what documented path, is no longer an internal preference. It is the first control a surveyor can test.
The Flood Line: What Sandy Put on the Record
Hurricane Sandy made landfall on October 29, 2012, and the storm surge pushed the East River and New York Harbor into the basements of hospitals that had been designed on the assumption that the water would stay outside. Post-storm reviews counted approximately 6,300 patients evacuated from 37 healthcare facilities across the five boroughs — the largest hospital evacuation event in the city’s history, executed over days, in the dark, by staff carrying patients down stairwells.
Bellevue Hospital Center, the flagship of the city’s public hospital system, was evacuated on October 31, 2012 — for the first time in its history. According to the City’s own account of the federal recovery funding that followed, floodwater inundated a basement containing more than 250 pieces of equipment critical to running the facility, including the pumps that move fuel to its generators: the building had power equipment on upper floors and no way to feed it. Bellevue reopened primary care clinics on November 19, restored its emergency department in limited capacity on December 10, and did not fully restore all services — resuming Level 1 Trauma Center status and all 828 inpatient beds — until February 7, 2013, more than three months after the storm. NYU Langone Medical Center, immediately to the north, also evacuated after floodwater knocked out main and backup power.
The recovery investments are as instructive as the failure. The City’s published program for Bellevue includes removable flood barriers at the two loading-dock entrances facing the East River, drinking-water and fuel pumps raised to higher elevations, a new 2,350-foot flood wall designed to protect critical parts of the campus to the 500-year flood level, new storm and sanitary drainage pumps, and flood-proof elevators for the main tower. Read as a continuity document, that list is a confession of the original design’s assumptions: fuel, water, drainage, and vertical transport were all single-threaded through the basement, and the fix was to raise, wall off, or duplicate each one.
The generalizable lesson is not “New York floods.” It is that flood continuity fails at the level of building systems, not emergency plans. Every evacuated facility had an emergency plan. What failed were fuel pumps, electrical switchgear, and elevator machinery placed below the water line — an inventory question that can be answered in peacetime with a tape measure and a flood map.
The Continuity Audit: What a New York Facility Must Be Able to Show
The incident determination path. A named role — not a committee — authorized to declare a cybersecurity incident under the 405.46 definition, with a written determination procedure, a documented notification path to the Department of Health, and a log that starts when the determination is made, not when the investigation ends. The 72-hour clock runs from determination, which makes the determination process itself the control.
Stacked notification map. One page, maintained, showing every notification the facility owes in the first 72 hours of a serious incident — the Department of Health under 405.46, HIPAA breach analysis and notification, SHIELD Act duties, cyber-insurer notice conditions, and law-enforcement contacts — with the owner and the trigger for each. The New York rule’s distinctive feature is that it stacks; it replaces nothing.
Downtime operations. The regulation’s definition ties reportability to material impact on operations, which is another way of saying the state now expects the facility to know, in advance, what it does when the systems stop: downtime procedures for registration, medication administration, laboratory and imaging ordering, and clinical documentation, rehearsed rather than laminated. Our cyber incident response guide covers the response-plan skeleton; the New York addition is that the plan’s existence and testing are state requirements, not good practice.
The basement inventory. A walk-down list of every critical system below the applicable flood elevation — fuel pumps and day tanks, switchgear, water and sewage pumps, elevator machinery, medical gas, IT rooms — with the mitigation for each: raised, walled, relocated, or consciously accepted. Bellevue’s published retrofit list is the template.
Evacuation and receiving agreements that assume the neighbors are busy. Sandy’s snowball effect is the planning fact: when one hospital evacuates, its neighbors absorb the surge while managing their own damage. Agreements should name receiving facilities outside the same flood footprint, define the transport request path including the ambulance-shortage contingency the Sandy reviews documented, and be exercised. The federal floor for all of this remains the CMS Emergency Preparedness Rule, covered in our guide to the rule’s four core components.
Testing the Two Clocks
Exercise the clocks together or not at all. The scenario New York has actually lived combines them: a coastal storm that degrades physical infrastructure for days, during which the facility discovers — as facilities now routinely do — a cyber incident in progress. A tabletop built on that pairing tests the determination decision under degraded conditions: the CISO is unreachable, the EHR is down for an unrelated reason, and someone must still decide whether what the vendor is describing meets the incident definition, and start the 72-hour clock on a judgment call. Testing methodology — objectives, injects, after-action discipline — is covered in our disaster recovery plan testing guide; the New York-specific addition is to score the exercise on determination time and notification completeness, the two things the regulation makes auditable. See also our guide to healthcare continuity compliance for how the state layer integrates with CMS and Joint Commission requirements, and why a backup path that bypasses MFA is now a finding waiting to happen under a regulation that mandates MFA and audit trails in the same breath.
Frequently Asked Questions
When does the 72-hour clock start?
When the hospital determines that a cybersecurity incident, as defined in 10 NYCRR 405.46, has occurred. The regulation requires notification “as promptly as possible, but no later than 72 hours after determining” the incident — so the clock starts at the determination, not at first detection. That makes a fast, documented determination process a compliance control in its own right.
Does the New York rule replace HIPAA breach notification?
No. The Department of Health notification under 405.46 is an operational report to the state regulator. It does not discharge HIPAA breach notification to affected individuals and the U.S. Department of Health and Human Services, SHIELD Act duties, or any other notification regime the facility is subject to. Each runs on its own trigger and deadline.
Who must comply with 10 NYCRR 405.46?
General hospitals licensed under Article 28 of the New York Public Health Law. The 72-hour incident notification took effect on publication, October 2, 2024; the full program requirements — CISO designation, annual risk assessment, testing, MFA, incident response plan, six-year record retention — took effect October 2, 2025.
What is the difference between a cybersecurity event and a cybersecurity incident under the rule?
An event is the broad category — it includes unsuccessful attempts to gain unauthorized access. An incident is an event with operational consequence: material adverse impact on normal operations, a reasonable likelihood of materially harming operations, or ransomware deployed within a material part of the hospital’s information systems. Only incidents must be reported within 72 hours.
What is the single most transferable lesson from Sandy for facilities outside New York?
Inventory your basement. The facilities that evacuated had emergency plans; what failed were fuel pumps, switchgear, and pumps located below the water line. Bellevue’s published retrofit — raised fuel and water pumps, flood barriers, a flood wall built to the 500-year level, flood-proof elevators — is a checklist any low-lying facility can adapt.
Continuity Hub’s metro series audits local resilience the way the national guides audit frameworks. The companion pieces cover Houston and Seattle–Tacoma.