Your medical record may contain your name, address, date of birth, insurance information, prescriptions, diagnoses, test results and, in some cases, financial or government identification data.
That makes hospitals and other healthcare organisations attractive targets for cybercriminals.
In 2026, cybersecurity has become more than an IT problem for hospitals. Ransomware attacks, stolen patient records, compromised suppliers and attacks on connected healthcare systems can potentially disrupt appointments, diagnostic services and even emergency care.
Recent developments in the United States, United Kingdom, Canada and Australia show just how seriously governments and hospitals are treating the threat.
Healthcare Cyberattacks Are Becoming More Sophisticated
The American Hospital Association warned in August 2026 that cyberattacks against hospitals and health systems continue to increase in frequency, sophistication and impact.
The AHA said healthcare organisations were facing threats from international cybercrime groups and state-sponsored actors, including ransomware attacks, data-theft extortion and attacks targeting third-party vendors used by hospitals.
That last category is particularly important.
A hospital can spend millions protecting its own network and still be affected if hackers successfully attack a laboratory, billing company, medical-device manufacturer, cloud provider or other organisation connected to it.
Ransomware Remains One of Healthcare’s Biggest Threats
Ransomware is malicious software that can encrypt an organisation’s systems and prevent staff from accessing important information until money is demanded.
Modern ransomware groups frequently go even further.
Instead of merely encrypting information, attackers may steal it first. They can then threaten to publish sensitive records unless the organisation pays them—an approach often called double extortion.
In August 2026, US agencies issued an updated warning about the Medusa ransomware operation. According to the American Hospital Association, Medusa had affected more than 500 victims across multiple industries, with healthcare among its frequent targets.
The AHA also said Medusa had claimed responsibility during 2026 for an attack affecting an important Level 1 trauma centre, disrupting healthcare delivery and creating potential risks to patient and community safety.
This highlights a critical difference between hacking a typical company and attacking a hospital.
A hospital cyberattack can potentially become a patient-safety event.
If clinicians cannot access electronic records, laboratory systems, imaging results or other digital services, delivering care can become more difficult.
Millions of US Healthcare Records Continue to Be Exposed
The scale of the problem becomes clearer when looking at US government breach reports.
The Department of Health and Human Services maintains a public database of breaches affecting 500 or more people.
Among incidents reported to HHS in July 2026 were a hacking incident involving DentaQuest affecting approximately 15 million people, one involving Brown Health Medical Group affecting more than 311,000, an incident involving One Medical Group affecting more than 153,000, and another involving Madera Community Hospital affecting more than 150,000.
These figures refer to incidents reported to the government during that period and illustrate the enormous scale healthcare breaches can reach.
US regulators are also increasing enforcement.
In April 2026, HHS announced settlements involving four separate ransomware investigations affecting more than 427,000 individuals.
Then in July, HHS announced its 21st ransomware enforcement action, involving OSF Healthcare System. Regulators emphasised that healthcare organisations must perform thorough security risk assessments to understand where patient information may be vulnerable.
What Exactly Can Hackers Steal?
The answer can be much more than your email address.
A September 2026 US enforcement action involving genetics company Ambry Genetics offers an example.
A previous phishing attack had potentially exposed information belonging to 225,370 people. According to HHS, the affected data included names, addresses, birth dates, some Social Security or driver’s licence numbers, financial information, diagnoses, medical conditions, laboratory results, medications and treatment information.
The NHS Is Monitoring Cyber Threats 24 Hours a Day
The United Kingdom is facing the same challenge.
NHS England says its Cyber Security Operations Centre operates 24 hours a day, seven days a week, monitoring NHS systems for potentially suspicious activity.
The centre helps protect services used by more than 37 million NHS App users and around 60,000 NHS 111 calls every day.
The level of threat activity remains significant.
As of September 2026, NHS England’s cybersecurity system listed 23 high-severity cyber alerts during 2026 alone, involving issues such as exploited vulnerabilities and insecure software.
Healthcare cybersecurity is not limited to patient databases either.
In March 2026, NHS England issued a notice to healthcare organisations following a cyberattack affecting medical technology company Stryker Medical, warning of disruption involving supplies of medical equipment and consumables.
Australia Reports Record Data-Breach Notifications
Australia is also seeing growing pressure.
In July 2026, the Office of the Australian Information Commissioner reported that Australia received a record 1,205 data-breach notifications during 2025, up 8% from the previous year.
Malicious or criminal activity caused 716 of those breaches.
Most notably, health service providers were the most commonly affected sector, accounting for 225 notifications, or 19% of the total.
That puts healthcare ahead of sectors including financial services, government and education in the number of reported Australian data breaches.
Canada Warns Healthcare Ransomware Is Rising
Canada’s national cybersecurity authorities are similarly warning healthcare organisations.
The Canadian Centre for Cyber Security says ransomware incidents affecting healthcare have been rising worldwide.
Its National Cyber Threat Assessment notes that ransomware incidents involving healthcare had, by one estimate, nearly doubled since 2022.
Canada has previously experienced attacks in which hospital IT providers were compromised, temporarily forcing hospitals to shut down internal systems and contributing to delays in patient care.
The lesson across all four countries is strikingly similar:
Healthcare’s increasing dependence on digital technology improves medicine—but also creates more potential entry points for attackers.
Is Your Medical Data Actually Safe?
No organisation can realistically promise that a cyberattack will never happen.
Hospitals increasingly use measures such as network monitoring, multifactor authentication, encryption, employee security training, backups, incident-response plans and restrictions on access to patient records.
But patients also have a role.
What Patients Can Do to Protect Themselves
Use a strong, unique password for your patient portal. Never reuse the same password you use for banking, email or social media.
Enable multifactor authentication when available. This adds another layer of protection even if someone obtains your password.
Be suspicious of healthcare phishing messages. After major breaches, criminals may impersonate hospitals, insurers or government agencies. Avoid clicking unexpected links requesting passwords or payment information.
Read breach notifications carefully. If your healthcare provider informs you that Social Security numbers, financial details or other identity information were compromised, follow its recommended protective measures.
Check medical and insurance records. Unexpected claims, appointments or bills can be warning signs that someone is misusing your information.
Keep contact information current. Your hospital or insurer needs an accurate email, phone number or address to notify you quickly if a breach occurs.
The Biggest Cybersecurity Risk Isn’t Just Stolen Data
When most people hear “data breach,” they think about privacy.
In healthcare, the danger can be much broader.
A ransomware attack can shut down computer systems. An attack on a laboratory can delay results. A compromised supplier can disrupt medical equipment. An unavailable patient record can make doctors’ jobs harder.
That makes healthcare cybersecurity fundamentally different from many other industries.