Includes
All services performed in a reference laboratory. Services can be comprehensive or specific and generally include the following: blood counts, coagulation, clinical biochemistry, histopathology, cytopathology, molecular diagnostics, genetic testing, drug testing, etc.

Excludes
Hematology/Oncology (Q508), Services of a Pathologist, Laboratory Technician or Technologist (Q515), equipment (6632 or 6640), and reagents and test kits (6550).

Possible NAICS Codes
621511 – Medical Laboratories
541380 – Testing Laboratories and Services
334516 – Analytical Laboratory Instrument Manufacturing
561320 – Temporary Help Services
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
541990 – All Other Professional, Scientific, and Technical Services
325413 – In-Vitro Diagnostic Substance Manufacturing

Description
Chemical/Biological Studies and Analysis

Possible NAICS Codes
541380 – Testing Laboratories and Services
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
541990 – All Other Professional, Scientific, and Technical Services
541620 – Environmental Consulting Services
541690 – Other Scientific and Technical Consulting Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541611 – Administrative Management and General Management Consulting Services
621511 – Medical Laboratories
334516 – Analytical Laboratory Instrument Manufacturing
325414 – Biological Product (except Diagnostic) Manufacturing

Description
Water Quality Studies

Possible NAICS Codes
541380 – Testing Laboratories and Services
541620 – Environmental Consulting Services
221310 – Water Supply and Irrigation Systems
541990 – All Other Professional, Scientific, and Technical Services
541690 – Other Scientific and Technical Consulting Services
611710 – Educational Support Services
325998 – All Other Miscellaneous Chemical Product and Preparation Manufacturing
541330 – Engineering Services
561210 – Facilities Support Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)

Description
Other Environmental Services, Studies, and Analytical Support

Possible NAICS Codes
541620 – Environmental Consulting Services
562910 – Remediation Services
541380 – Testing Laboratories and Services
541690 – Other Scientific and Technical Consulting Services
541330 – Engineering Services
115310 – Support Activities for Forestry
541611 – Administrative Management and General Management Consulting Services
541990 – All Other Professional, Scientific, and Technical Services
481212 – Nonscheduled Chartered Freight Air Transportation
562211 – Hazardous Waste Treatment and Disposal

Description
Other Quality Control, Testing and Inspection Services: Miscellaneous

Possible NAICS Codes
541380 – Testing Laboratories and Services
488390 – Other Support Activities for Water Transportation
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
541350 – Building Inspection Services
561210 – Facilities Support Services
237120 – Oil and Gas Pipeline and Related Structures Construction
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
541620 – Environmental Consulting Services
541690 – Other Scientific and Technical Consulting Services

Description
Scientific Data Studies

Possible NAICS Codes
541380 – Testing Laboratories and Services
541990 – All Other Professional, Scientific, and Technical Services
541690 – Other Scientific and Technical Consulting Services
541714 – Research and Development in Biotechnology (except Nanobiotechnology)
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541620 – Environmental Consulting Services
541611 – Administrative Management and General Management Consulting Services
518210 – Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
611310 – Colleges, Universities, and Professional Schools
541360 – Geophysical Surveying and Mapping Services

Description
Environmental Studies and Assessments

Possible NAICS Codes
541620 – Environmental Consulting Services
541380 – Testing Laboratories and Services
562910 – Remediation Services
541611 – Administrative Management and General Management Consulting Services
541690 – Other Scientific and Technical Consulting Services
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
611710 – Educational Support Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)

Description
Other Special Studies and Analysis

Possible NAICS Codes
541611 – Administrative Management and General Management Consulting Services
541512 – Computer Systems Design Services
541380 – Testing Laboratories and Services
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
541620 – Environmental Consulting Services
541720 – Research and Development in the Social Sciences and Humanities
541690 – Other Scientific and Technical Consulting Services
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
541511 – Custom Computer Programming Services

Description
Water Quality Support Services

Includes
Includes: Industrial Investigation Surveys and Technical Support Related to Water Pollution

Possible NAICS Codes
541380 – Testing Laboratories and Services
562211 – Hazardous Waste Treatment and Disposal
541620 – Environmental Consulting Services
221310 – Water Supply and Irrigation Systems
561210 – Facilities Support Services
541611 – Administrative Management and General Management Consulting Services
325998 – All Other Miscellaneous Chemical Product and Preparation Manufacturing
562910 – Remediation Services
541330 – Engineering Services
924110 – Administration of Air and Water Resource and Solid Waste Management Programs

Description
Other Professional Services

Possible NAICS Codes
493190 – Other Warehousing and Storage
541611 – Administrative Management and General Management Consulting Services
541990 – All Other Professional, Scientific, and Technical Services
541690 – Other Scientific and Technical Consulting Services
541330 – Engineering Services
541519 – Other Computer Related Services
711510 – Independent Artists, Writers, and Performers

Includes
Laboratory Glassware; Laboratory Funnels; Laboratory Furnaces; Glass Beads; Laboratory White Sand; Litmus Paper; Paper Filters; Insect Transfixion Pins; Laboratory Glass Wool; Laboratory Furniture, except Dental Laboratory.

Excludes
Instruments covered by other classes in group 66; Dental Laboratory Equipment; Laboratory Scales and Balances; In Vitro Diagnostic Substances and Reagents.

Possible NAICS Codes
423450 – Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
339999 – All Other Miscellaneous Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing

Description
Maintenance, Repair and Rebuilding of Equipment: Instruments and Laboratory Equipment

Possible NAICS Codes
811210 – Electronic and Precision Equipment Repair and Maintenance
334516 – Analytical Laboratory Instrument Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
561210 – Facilities Support Services
541380 – Testing Laboratories and Services
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334519 – Other Measuring and Controlling Device Manufacturing

Description
Inspection and Laboratory Services (except medical/dental): Medical, Dental, and Veterinary Equipment and Supplies

Includes
Includes: Commercial Testing and Laboratory Services

Excludes
Excludes: Medical and Dental Laboratory Services

Possible NAICS Codes
541380 – Testing Laboratories and Services
541690 – Other Scientific and Technical Consulting Services
541350 – Building Inspection Services
541990 – All Other Professional, Scientific, and Technical Services
811210 – Electronic and Precision Equipment Repair and Maintenance
621511 – Medical Laboratories

Description
Geological Studies

Possible NAICS Codes
541380 – Testing Laboratories and Services
541990 – All Other Professional, Scientific, and Technical Services
541360 – Geophysical Surveying and Mapping Services
541690 – Other Scientific and Technical Consulting Services
611310 – Colleges, Universities, and Professional Schools
541620 – Environmental Consulting Services
611710 – Educational Support Services
561110 – Office Administrative Services

Description
Equipment and Materials Testing: Miscellaneous

Possible NAICS Codes
541380 – Testing Laboratories and Services
238220 – Plumbing, Heating, and Air-Conditioning Contractors
541330 – Engineering Services
541990 – All Other Professional, Scientific, and Technical Services
811210 – Electronic and Precision Equipment Repair and Maintenance
334519 – Other Measuring and Controlling Device Manufacturing
562998 – All Other Miscellaneous Waste Management Services
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
561210 – Facilities Support Services
238210 – Electrical Contractors and Other Wiring Installation Contractors