Financial research concept

Diagnostic Lab Requisition Volume Growth

measures year-over-year growth in diagnostic test requisitions, including acquired volume.

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.

Reported growth exceeded organic growth by 8.9 percentage points
Organic growth was only about 27.6% of the reported rate
Reported volume growth is not same-store growth
Part of the Diagnostic Laboratory Economics
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Diagnostic Lab Requisition Volume Growth measures year-over-year growth in Quest Diagnostics test requisitions, including acquired volume.

Quest Diagnostics reported 12.3% requisition-volume growth in 2025.

Reported growth exceeded organic growth by 8.9 percentage points

Quest reported 3.4% organic requisition-volume growth.

Subtracting 3.4% from 12.3% gives an 8.9-point gap, showing that acquisition and scope effects materially amplified reported volume.

Organic growth was only about 27.6% of the reported rate

The ratio of 3.4% to 12.3% is approximately 27.6%.

That is a scale comparison, not a formal attribution of incremental requisitions.

Use Diagnostic Lab Organic Requisition Volume Growth to keep the underlying-growth measure separate.

Reported volume growth is not same-store growth

Quest's figure includes acquired requisitions.

It should not be interpreted as a pure read on demand from the pre-existing laboratory network.

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 GrowthDiagnostic Lab Requisition Volume GrowthCurrent conceptDiagnostic Lab Revenue per Requisition Change Diagnostic Lab Test Requisition Volume Diagnostic 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 Revenue per Requisition Change Diagnostic Lab Test Requisition Volume Diagnostic Solutions Revenue

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Compare public companies

Compare 12.3% reported requisition growth with 3.4% organic growth and the 8.9-point gap.

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