Southern Illinois Dermatology Data Breach Exposes Sensitive Information of 160,000 Individuals
Law firm Schubert Jonckheer & Kolbe LLP is investigating a data breach at Southern Illinois Dermatology, an Illinois-based skincare provider, after an unauthorized third party accessed its network on November 28, 2025. The breach compromised the personal and medical data of approximately 160,000 individuals, including full names, addresses, dates of birth, Social Security numbers, telephone numbers, email addresses, and medical record numbers.
Despite the breach occurring in late 2025, Southern Illinois Dermatology did not begin notifying affected individuals until April 2, 2026, potentially violating state and federal data breach notification laws. The delayed disclosure may have increased the risk of identity theft and privacy violations for those impacted. Legal action is being considered to address potential damages and enforce improvements to the organization’s cybersecurity measures.
Source: https://www.classactionlawyers.com/blog/southernillinoisdermatology
Southern Dermatology cybersecurity rating report: https://www.rankiteo.com/company/southern-dermatology
"id": "SOU1777019854",
"linkid": "southern-dermatology",
"type": "Breach",
"date": "11/2025",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': '160,000',
'industry': 'Healthcare',
'location': 'Illinois, USA',
'name': 'Southern Illinois Dermatology',
'type': 'Healthcare Provider'}],
'customer_advisories': 'Notification sent to affected individuals on April 2, '
'2026',
'data_breach': {'number_of_records_exposed': '160,000',
'personally_identifiable_information': ['Full names',
'Addresses',
'Dates of birth',
'Social Security '
'numbers',
'Telephone numbers',
'Email addresses',
'Medical record '
'numbers'],
'sensitivity_of_data': 'High (Social Security numbers, '
'medical record numbers, etc.)',
'type_of_data_compromised': ['Personal data', 'Medical data']},
'date_detected': '2025-11-28',
'date_publicly_disclosed': '2026-04-02',
'description': 'An unauthorized third party accessed Southern Illinois '
"Dermatology's network, compromising the personal and medical "
'data of approximately 160,000 individuals. The breach '
'included sensitive information such as full names, addresses, '
'dates of birth, Social Security numbers, telephone numbers, '
'email addresses, and medical record numbers. The delayed '
'notification may have increased the risk of identity theft '
'and privacy violations.',
'impact': {'brand_reputation_impact': 'Potential damage due to delayed '
'disclosure',
'data_compromised': 'Personal and medical data of 160,000 '
'individuals',
'identity_theft_risk': 'Increased risk due to exposure of Social '
'Security numbers and other PII',
'legal_liabilities': 'Potential violations of state and federal '
'data breach notification laws'},
'investigation_status': 'Under investigation',
'references': [{'source': 'Schubert Jonckheer & Kolbe LLP'}],
'regulatory_compliance': {'legal_actions': 'Legal action being considered by '
'Schubert Jonckheer & Kolbe LLP',
'regulations_violated': ['State data breach '
'notification laws',
'Federal data breach '
'notification laws']},
'response': {'communication_strategy': 'Delayed notification to affected '
'individuals'},
'threat_actor': 'Unauthorized third party',
'title': 'Southern Illinois Dermatology Data Breach Exposes Sensitive '
'Information of 160,000 Individuals',
'type': 'Data Breach'}