Financial research concept

Diagnostic Lab Test Requisition Volume

measures the number of test requisitions processed by a diagnostic laboratory network during the reporting period.

By Lee BaileyPublished Sep 25, 2026

Research context

See what supports this page, how current it is, and where comparable or historical context is available.

Research date: Sep 25, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context: 17 connected conceptsPart of the reviewed Diagnostic Laboratory Economics; issuer definitions remain distinct where disclosed.
Company examples: 1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.

A simple DIS revenue-to-requisition ratio is about $44.20
That ratio is not Quest's revenue-per-requisition KPI
Requisitions are not tests, specimens, or patients
Part of the Diagnostic Laboratory Economics
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Diagnostic Lab Test Requisition Volume measures the number of test requisitions processed by Quest Diagnostics during the reporting period.

Quest Diagnostics reported approximately 244 million requisitions in its 2025 disclosures.

A simple DIS revenue-to-requisition ratio is about $44.20

Diagnostic Information Services revenue was $10.785 billion.

Dividing $10.785 billion by 244 million requisitions gives approximately $44.20 per requisition as a broad scale check.

That ratio is not Quest's revenue-per-requisition KPI

Diagnostic Information Services contains activity that does not map perfectly one-for-one to the requisition count.

Use Diagnostic Lab Revenue per Requisition Change for the issuer's actual year-over-year monetization metric.

Requisitions are not tests, specimens, or patients

A single requisition can contain multiple tests, and one patient can generate multiple requisitions.

The approximately 244 million requisitions therefore measure ordering events, not unique individuals or assays.

Primary source: Quest Diagnostics 2025 Form 10-K.

Part of the Diagnostic Laboratory Economics

Connect requisition growth and monetization, test and customer-channel mix, and the collection, connectivity, payer-access, and logistics network that supports a large diagnostic laboratory platform.

Browse the full operating model in Company Analysis →

Where this concept fits

Requisition growth and monetizationCurrent relationship
Test requisition volume is the core activity base, reported and organic requisition growth separate acquisition-driven from underlying volume changes, and revenue per requisition shows monetization across price, payer mix, business mix, test mix, and tests per requisition. Core diagnostic information services and diagnostic solutions revenue keep the two business groups distinct.
Diagnostic Information Services Revenue Diagnostic Lab Organic Requisition Volume Growth Diagnostic Lab Requisition Volume Growth Diagnostic Lab Revenue per Requisition ChangeDiagnostic Lab Test Requisition VolumeCurrent conceptDiagnostic Solutions Revenue
Test complexity and customer-channel mix
Gene-based and esoteric testing plus anatomic pathology show important testing-complexity mix, while physician, hospital, and other diagnostic-information-services revenue shares show where demand originates. Test mix and customer channel are separate dimensions of the revenue model.
Diagnostic Lab Anatomic Pathology Revenue Mix Diagnostic Lab Gene-Based and Esoteric Testing Revenue Mix Diagnostic Lab Hospital Channel Revenue Mix Diagnostic Lab Other Information Services Revenue Mix Diagnostic Lab Physician Channel Revenue Mix
Access, connectivity, and logistics network
Patient access points and service centers describe specimen-collection reach, connected clinician and hospital accounts plus insured-lives access describe ordering and payer-network reach, and daily logistics stops plus courier vehicles show the physical transport infrastructure connecting collection sites to laboratories.
Diagnostic Lab Connected Clinician and Hospital Accounts Diagnostic Lab Courier Vehicle Count Diagnostic Lab Daily Logistics Stop Count Diagnostic Lab Insured Lives Access Diagnostic Lab Patient Access Point Count Diagnostic Lab Patient Service Center Count

See It in Company Research

These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.

DGXOpen operating-model research →17 of 17 reviewed concepts in Diagnostic Laboratory EconomicsRequisition growth and monetization6 of 6 bridge concepts supportedContinue through this bridge:Diagnostic Information Services Revenue Diagnostic Lab Organic Requisition Volume Growth Diagnostic Lab Requisition Volume Growth Diagnostic Lab Revenue per Requisition Change Diagnostic Solutions Revenue

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Compare public companies

Compare Quest's 244M requisitions with core DIS revenue as a scale check while preserving the requisition definition.

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