NorthShore Health Centers, a nonprofit healthcare provider serving patients in Porter, Lake, La Porte, and Jasper Counties in Northwest Indiana, has warned patients about a cybersecurity incident that exposed some of their personal and protected health information.

According to its October 14, 2026, website notice about the data privacy event, the incident was first detected on August 10, 2026. An investigation was launched into suspicious network activity, with assistance provided by third-party cybersecurity and digital forensics experts. The investigation determined that an (unnamed) unauthorized third party had access to parts of its IT environment between August 10, 2026, and August 11, 2026, and potentially viewed or obtained files containing patient information.

The investigation and data review are ongoing as of October 14, 2026, so the number of affected individuals has not yet been confirmed. The types of information involved are still being assessed; however, it is likely that names, Social Security numbers, information related to medical treatments and conditions, and health insurance information were involved.

NorthShore Health Centers said it will mail notification letters to the affected individuals when the data review is concluded. Current and former patients should be aware that a ransomware group called Insomnia has claimed responsibility for the incident. The group added NorthShore Health Centers to its dark web data leak site and threatened to publish the stolen data if a ransom was not paid; it then proceeded to leak the stolen data. The HIPAA Journal has not downloaded any of the leaked data; however, the file tree suggests that patient data is likely included in the leaked dataset.

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As such, patients should consider placing a fraud alert and credit freeze with one of the three major credit reporting agencies and should carefully monitor their accounts and explanation of benefits statements for signs of data misuse. If data misuse is suspected, it should be promptly reported to the relevant institution (bank, insurer, etc.).

The post Data Breach Announced by NorthShore Health Centers appeared first on The HIPAA Journal.

Denver Health Medical Plan has notified more than 238,000 individuals about a vendor-related data incident. Data breaches have also been announced by Johns Hopkins Bayview Medical Center and BASS Medical Group.

Denver Health Medical Plan

Denver Health Medical Plan, a Denver, Colorado-based non-profit health plan affiliated with the Denver Health and Hospital Authority, has recently disclosed a data breach involving the protected health information of 238,083 current and former plan members. The incident involved SquareML, the provider of an artificial intelligence and machine learning analytics platform. On August 14, 2026, Denver Health Medical Plan was notified that an access key used by the vendor was found on a public website. The access key could have been used to access a database maintained by its vendor that contained plan members’ information.

The key had inadvertently been added to a public website by the vendor on June 27, 2025, where it remained for more than a year. The access key was deactivated on August 18, 2026. Data exposed in the incident included full names, city/state/zip code, demographic information, dates of birth, health plan eligibility information, provider names, admission/discharge/transfer information, and health metrics such as BMI, HbA1c, and eGFR. Financial information and Social Security numbers were not exposed.

Denver Health Medical Plan said it has not identified any evidence that the key had been misused. If the access key was found and used, it would not have been possible to download, export, delete, or alter data, and the key only provided read-only access.  While the data breach involved SquareML, notification letters have been mailed to the affected individuals by Denver Health Medical Plan.

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Johns Hopkins Bayview Medical Center

Johns Hopkins Bayview Medical Center in Baltimore, Maryland, has discovered that the protected health information of 3,182 patients may have been exposed in an AI-related incident. A member of staff uploaded a spreadsheet containing limited patient data to a public AI tool that had not been approved for use by staff members. The error was identified by the medical center on September 21, 2026. The spreadsheet contained information on patients who had been admitted and treated between May 2026 and September 2026, including names, admission/treatment dates, department information, account numbers, medical record numbers, medications, and treating provider names.

When the incident was detected, the employee deleted the AI prompt and thread and removed the spreadsheet from the tool’s history. The medical center also contacted the provider of the tool and requested the data be deleted from the system. As a precaution against any data misuse, the affected individuals have been offered complimentary credit monitoring services for 12 months, and steps have been taken to prevent similar incidents in the future, including providing additional training to staff members on the AI platforms permitted for staff use.

BASS Medical Group

BASS Medical Group, a physician-owned multi-specialty practice based in Walnut Creek, California, has notified the California Attorney General about a data security incident first identified on September 4, 2026. An investigation was launched to determine the cause of suspicious network activity, and on September 22, 2026, the investigation determined that there had been unauthorized access to its network and personal and/or protected health information had been exposed and may have been viewed or acquired by an unauthorized third party.

The information that may have been compromised was limited to medical treatment codes, billing information, and health insurance information. BASS Medical Group has implemented additional safeguards to prevent similar incidents in the future. Notification letters started to be mailed to the affected individuals on October 22, 2026. The number of affected individuals has not yet been publicly disclosed.

The post Denver Health Medical Plan Discloses Vendor Breach Affecting 238K Members appeared first on The HIPAA Journal.

Data breaches have been announced by UltraMobile Imaging in New York, Artistic Smiles in Colorado, Parkview Health in Indiana, and Cognitive Behavior Therapy Center in Virginia.

UltraMobile Imaging, New York

UltraMobile Imaging, a Rochester, New York-based mobile medical diagnostic service provider, has determined that the protected health information of 75,000 individuals was exposed in a data security incident earlier this year. A network disruption was experienced on July 30, 2026, impacting some of its computer systems. Third-party digital forensics experts were engaged to investigate the nature and scope of the incident and confirmed that there was unauthorized access to parts of its network for a limited time. The UltraMobile Imaging website breach notice does not state when its network was first compromised.

UltraMobile Imaging has determined that the information likely exposed in the incident included names, addresses, phone numbers, dates of birth, gender information, diagnoses, lab test results, medications, dates of service, study IDs, procedure types, CPT codes, ordering physician names, claims information, facility names, and financial account information. The affected individuals are now being notified. Credit monitoring services do not appear to have been offered.

Artistic Smiles, Colorado

Lift Dental PLLC, the operator of a dental practice in Longmont, Colorado called Artistic Smiles, has identified unauthorized access to its computer systems. The intrusion was identified on or around June 21, 2026, and the forensic investigation determined that an unauthorized third party had access to its network between June 14, 2026, and June 21, 2026.

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The data review determined that the information exposed in the incident included names, addresses, dates of birth, and medical and dental treatment information. The data breach was recently reported to the HHS’ Office for Civil Rights as affecting 3,735 individuals. It is not clear if ransomware was involved; however, a ransomware group called Nightspire claimed responsibility for the incident and added Artistic Smiles to its dark web data leak site.

Parkview Health, Indiana

Parkview Health in Fort Wayne, Indiana, is investigating a potential cybersecurity incident. On October 19, 2026, the nonprofit community health system said it recently identified suspicious network activity and experienced a network-wide internet outage that prevented access to the MyChart portal and other online services. Without access to those systems, it was unable to issue appointment reminders.

The MyChart portal and Find a Doctor service have now been restored and can be used again by patients, although video visits are still not available and billing functions have yet to be restored. Staff are working to restore the remaining services as quickly as possible.  Parkview Health has not publicly confirmed if patient data was exposed or stolen.

Cognitive Behavior Therapy Center, Virginia

Cognitive Behavior Therapy Center in Chesapeake, Virginia, has been affected by a security incident at one of its third-party vendors – Express Billing Systems. The third-party billing company discovered unauthorized access to its computer network on August 24, 2026, and determined that files containing patient information were copied in the incident. The review of the impacted data confirmed that names, addresses, phone numbers, Social Security numbers, diagnoses, and information related to the services provided. Approximately 1,500 Cognitive Behavior Therapy Center patients are affected.

This was a data theft and extortion incident, and some patients have been contacted directly by the threat actor in an attempt to extort money. Express Billing Systems said it has taken steps to strengthen security to prevent similar incidents in the future and is providing additional training to its staff to help them identify phishing attempts and maintain security.

The post UltraMobile Imaging Identifies Data Breach Impacting 75,000 Individuals appeared first on The HIPAA Journal.

Quest Diagnostics, a Secaucus, New Jersey-based Fortune 500 diagnostic testing company, has notified the U.S. Securities and Exchange Commission (SEC) that it has identified unauthorized access to its Quantum Lab Services Manager (LSM) system and suspects patient records have likely been compromised. The scale of the data breach has yet to be determined. No threat group appears to have claimed responsibility for the intrusion.

In its October 22, 2026, Form 8-K filing, the company said the unauthorized access was first identified on October 21, 2026. An investigation has been launched to determine the nature and scope of the unauthorized activity, although the incident appears to be limited to its LSM system, which is used by certain clients to place test orders and receive and look up test results.

Upon detection, the company initiated its incident response protocol to contain the activity, and remedial measures have been implemented to prevent further unauthorized access. Third-party cybersecurity experts have been engaged to assist with the investigation, and federal law enforcement authorities have been notified. The incident has not affected the company’s ability to serve patients or impacted its business operations. Quest Diagnostics explained in a website notice that it temporarily paused access to the LSM system while the incident is investigated. Customers can continue to place orders and receive test results via fax, paper, or direct-customer LIS interfaces or EMRs.

Quest Diagnostics is one of the largest clinical diagnostic laboratory companies in the United States. The company operates more than 7,700 patient access points in North America, including around 2,000 patient service centers in 51 U.S. states and territories. The company serves around one-third of adult Americans, half of U.S. physicians and hospitals, and has around $11 billion in annual revenue.

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The company has experienced a major data breach in the past via its debt collection vendor, American Medical Collections Agency (AMCA). Hackers breached AMCA systems between August 2018 and March 2019 and gained access to the protected health information of approximately 11.9 million Quest Diagnostics patients.  While Quest Diagnostics has confirmed that patient records were accessed in the latest incident, it is unlikely to be on a similar scale, as only certain customers use the impacted system. Quest Diagnostics will release further information on the incident as the investigation progresses.

The post Patient Data Likely Accessed in Quest Diagnostics Hack appeared first on The HIPAA Journal.

The law firm Tarter Krinsky & Drogin has reported a breach of the protected health information of 196,645 patients of its healthcare clients. Data breaches have also been announced by Park Dental in Virginia and Heritage Pediatrics in Texas.

Tarter Krinsky & Drogin

A data breach has been announced by the Manhattan, New York-based law firm Tarter Krinsky & Drogin, which involved confidential and attorney-client privileged information and the protected health information of 196,645 patients of its healthcare clients. Suspicious activity was identified within its computer environment on September 10, 2025. Third-party digital forensics specialists were engaged to investigate the activity and confirmed that an unauthorized third party accessed some of its servers intermittently between July 9, 2025, and September 9, 2025. During that time, certain files on the servers were accessed or acquired.

The review of the affected files has recently been completed, and notification letters are now being mailed to the affected individuals. The types of data involved varied from individual to individual and may include some or all of the following: name, Social Security number, driver’s license number, date of birth, international tax identification number, passport number, tax identification number/individual tax identification number, financial account information, payment card information, username & password, medical information, health insurance information, and biometric data. The law firm has reviewed its security policies and procedures and implemented additional cybersecurity measures to prevent similar incidents in the future.

Young C. Park DDS (Park Dental)

Young C. Park DDS, PC, the operator of Park Dental in Roanoke, Virginia, has reported a data breach to the HHS’ Office for Civil Rights that has affected approximately 12,000 individuals. The practice learned that an unauthorized third party gained access to a workstation and an associate office email account. The unauthorized access occurred intermittently between June 10, 2026, and July 22, 2026, when the unauthorized access was identified.

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The investigation confirmed that email accounts had been subject to unauthorized access, and potentially there was unauthorized access to patient records. Data exposed in the incident included names, addresses, phone numbers, email addresses, birth dates, patient charts/record numbers, appointment information, provider names, referral information and communications, x-rays and related imaging, diagnoses, treatment plans and notes, and insurance and billing information. Park Dental has strengthened account and remote access security, increased monitoring, changed passwords and updated access privileges, reinforced its data privacy and security practices, and identified additional areas for further employee training.

Heritage Pediatrics

Heritage Pediatrics PLLC in San Antonio, Texas, has started notifying individuals affected by an April 2026 email security incident. The pediatric medical practice identified fraudulent emails being sent from an employee’s email account. The account was immediately secured, and an investigation was launched to determine the extent of the compromise and the nature of data exposed in the incident. Third-party cybersecurity experts were engaged to assist with the investigation and confirmed that a single email account had been compromised. The account was reviewed and found to contain patient data.

The data involved varied from individual to individual and may have included names in combination with some or all of the following: contact information, Social Security number, date of birth, driver’s license number/state identification number, passport number, financial account information, debit/credit card information, health insurance information, clinical information, diagnosis information, treatment information, treatment/procedure codes, medical record number, and health insurance information. The affected individuals were notified on or around October 19, 2026. At the time of issuing notifications, no misuse of the exposed data had been identified.

The post Data Breach at Manhattan Law Firm Involved PHI of 197,000 Individuals appeared first on The HIPAA Journal.