Light Manufacturing, Warehouse & Drivers
Class Code 4511: Analytical Laboratories or Assaying—Including Laboratory, Outside Employees, Collectors of Samples, & Drivers — Workers' Comp Insurance
Covers analytical and assay laboratories that test and analyze samples, including lab staff, outside sample collectors, and drivers who transport samples. It reflects both the precision bench work of a lab and the field collection component many labs perform.
- Risk level:
- low
What code 4511 covers
Class 4511 applies to analytical laboratories and assaying operations that test materials, chemicals, or samples for composition and quality, covering lab technicians performing testing and analysis, outside employees who travel to collect samples from client sites, and drivers who transport samples and equipment. The classification combines the controlled, bench-based lab environment with the field travel involved in sample collection, recognizing that many labs both analyze samples on-site and send staff out to gather them. This code covers a broad range of analytical and testing work, from environmental and materials testing to assaying of metals or other substances, without requiring separate classification of the lab versus field collection components. Laboratories performing manufacturing or production activities beyond testing and analysis may need that portion of the business evaluated under a different classification.
Included operations
- Laboratory testing and sample analysis
- Assaying of materials, metals, or samples
- Outside sample collection at client sites
- Drivers transporting samples and lab equipment
Assigned elsewhere
- Manufacturing or production activities performed by the same business beyond testing, evaluated under the applicable manufacturing classification
- Risk inspection or valuation work performed for insurance purposes — see code 8720
- Medical/clinical laboratory testing performed as part of a hospital or physician practice — evaluated as part of that facility's classification
- Environmental remediation or hazardous material handling performed as a distinct service, evaluated under the applicable specialized classification
Businesses that typically carry 4511
- Analytical testing laboratories
- Materials and environmental testing labs
- Assaying and metals testing companies
- Small and mid-size production shops
- Contract manufacturers serving other businesses
- Regional production and distribution facilities
Common misclassifications
Code 8720
Traveling lab sample collectors and traveling insurance risk inspectors both involve site visits, but the underlying work and classification differ.
Code 3632
Labs that fabricate their own custom testing fixtures or equipment in-house can blend precision machine shop work into what should remain laboratory testing exposure.
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What drives the cost of code 4511
- Total annual payroll for employees assigned to this classification
- Experience modification factor based on claims history
- State-specific base rates and loss costs filed for this class code
- Claims frequency and severity trends for the business
- Safety programs, training, and workplace controls in place
- Payroll mix across multiple classifications at the same location
What underwriters look for
- Machinery and equipment used, including guarding and lockout/tagout procedures
- Shift patterns, overtime, and production volume
- Prior claims history, especially repetitive-motion and machine-related injuries
- Safety program documentation and OSHA history
State differences
This entry uses standard NCCI class code phraseology, which applies in most NCCI-governed states. Pennsylvania (PCRB), Delaware (DCRB), California (WCIRB), New Jersey (NJCRIB), Michigan, New York (NYCIRB), and Massachusetts maintain their own classification manuals, and code numbers or phraseology can differ there. Our agency confirms the correct classification for your state before quoting.
Quote class code 4511.
One application goes out to every carrier we can access for your class of business. You get a ranked comparison you can review and purchase online — with a licensed agent available whenever you want one.
Mon–Fri, 8:00am–6:00pm ET · Independent agency licensed in 23 states
Class code 4511 questions
Does this code cover staff who travel to collect samples?
Yes, outside employees who collect samples at client sites are included along with lab-based testing staff.
Are our drivers who transport samples and equipment covered?
Yes, drivers supporting sample collection and lab operations are part of this classification.
Does this cover metals assaying specifically, or just general lab testing?
Both — the classification covers assaying of materials and metals along with broader analytical laboratory testing.
What if our lab also manufactures a product based on its testing?
Manufacturing or production activity beyond testing and analysis would typically need to be evaluated under a separate classification.
Last reviewed · Reviewed by Provident Financial Group licensed agents