{"url_path":"/sec/dgx/10-k/2026/item-9a","section_key":"item-9a","section_title":"Item 9A Controls and Procedures","topic":"sec","document":{"doc_type":"10-K","doc_date":"2026-02-26","source_url":"https://www.sec.gov/Archives/edgar/data/1022079/0001022079-26-000015-index.html","accession_number":"0001022079-26-000015","cik":"0001022079","ticker":"DGX","issuer_name":"QUEST DIAGNOSTICS INC","edgar_url":"https://www.sec.gov/Archives/edgar/data/1022079/0001022079-26-000015-index.html","primary_entity_key":"0001022079","primary_entity_name":"QUEST DIAGNOSTICS INC"},"word_count":157,"has_tables":true,"body_markdown":"Item 9A. Controls and Procedures\n\nConclusion Regarding Effectiveness of Disclosure Controls and Procedures\n\n    Under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we have evaluated the effectiveness of our disclosure controls and procedures (as defined under Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended). Based upon that evaluation, our Chief Executive Officer and our Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this annual report.\n\nReport of Management on Internal Control Over Financial Reporting\n\n    See page [75](#ie5c08f396cec4eb58b332bd385d844fc_154).\n\n    \n\nChanges in Internal Control\n\n    During the fourth quarter of 2025, there were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended) that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting."}