# Quest Diagnostics Reports Patient Record Intrusion

> Quest Diagnostics says unauthorized access to patient records raises data security concerns after earlier breaches.
- Title: Quest Diagnostics Reports Patient Record Intrusion | Shortify
- Summary: Quest Diagnostics says unauthorized access to patient records raises data security concerns after earlier breaches. Quest Diagnostics disclosed unauthorized…
- Keywords: quest diagnostics, labcorp, patient records, data security, healthcare breaches, medical identity theft, hipaa, news, politics, Quest, Diagnostics, Reports
- Source: Dallas Express — https://dallasexpress.com/business-markets/quest-diagnostics-reports-patient-record-intrusion-as-major-labs-face-scrutiny-over-data-security
- Author: Dallas Express
- Published: 2026-10-23T13:00:02+00:00
- Read time: 1 min
- Topics: quest diagnostics, labcorp, patient records, data security, healthcare breaches, medical identity theft, hipaa, news, politics
## Quest Diagnostics Discloses Unauthorized Access
Quest Diagnostics disclosed unauthorized access to a laboratory information system Thursday, raising fresh concerns about the security of patients’ medical records after earlier incidents exposed information involving millions of Americans.
## Accessed Patient Records But Not Specified
Quest believes an intruder accessed certain patient records, but it has not established which types of information the intruder viewed.
## Incident Response Procedures Launched
Quest said it launched its incident response procedures, notified federal law enforcement and engaged outside cybersecurity specialists.
## No Business Disruption Confirmed
The company said the incident had not materially disrupted its business operations or its ability to serve patients.
## No Affected Patients Identified
The company did not identify the number of affected patients or the data fields at issue.
## Previous Data Breaches
Quest has faced previous cybersecurity incidents, including a 2016 breach affecting 34,000 people and a 2019 incident involving 11.9 million patients.
## Labcorp Also Impacted
Labcorp became entangled in the 2019 American Medical Collection Agency incident, potentially exposing information for 27.5 million people across affected organizations.
## Settlement with Labcorp
In September 2026, a bipartisan coalition of 44 state attorneys general announced a $2,287,455 settlement with Labcorp over the 2019 incident.
## Key takeaway

Quest Diagnostics disclosed unauthorized access to patient records, but has not identified affected patients or data fields.