NAICS Code Description

621511 - Medical Laboratories

*Click to View Top Businesses by Revenue for 621511 – Complete Profiles*.

This U.S. industry comprises establishments known as medical laboratories primarily engaged in providing analytic or diagnostic services, including body fluid analysis, generally to the medical profession or to the patient on referral from a health practitioner.

Illustrative Examples:

Blood analysis laboratories
Medical pathology laboratories
Medical bacteriological laboratories
Medical testing laboratories
Medical forensic laboratories


  • Establishments known as dental laboratories primarily engaged in making dentures, artificial teeth, and orthodontic appliances to prescription are classified in U.S. Industry 339116, Dental Laboratories;
  • Establishments known as optical laboratories primarily engaged in grinding lenses to prescription are classified in U.S. Industry 339115, Ophthalmic Goods Manufacturing; and
  • Establishments known as orthopedic laboratories primarily engaged in making orthopedic or prosthetic appliances to prescription are classified in U.S. Industry 339113, Surgical Appliance and Supplies Manufacturing.
Index Entries for 621511
621511621511621511Bacteriological laboratories, diagnostic
621511621511621511Bacteriological laboratories, medical
621511621511621511Biological laboratories, diagnostic
621511621511621511Blood analysis laboratories
621511621511621511Cytology health laboratories
621511621511621511DNA testing laboratories
621511621511621511Forensic laboratories, medical
621511621511621511Genetic testing laboratories
621511621511621511Laboratories, medical (except radiological, X-ray)
621511621511621511Laboratory testing services, medical (except radiological, X-ray)
621511621511621511Medical laboratories (except radiological, X-ray)
621511621511621511Medical pathology laboratories
621511621511621511Mycology health laboratories
621511621511621511Parasitology health laboratories
621511621511621511Pathological analysis laboratories
621511621511621511Pathology laboratories, medical
621511621511621511Testing laboratories, medical
621511621511621511Toxicology health laboratories
621511621511621511Urinalysis laboratories

Top Businesses by Annual Sales for 621511 – Click for Complete Profiles:

Laboratory Corp Amer HoldingsBurlingtonNC
Quest Diagnostics IncorporatedSecaucusNJ
Atlanticare Health System IncEgg Harbor TownshipNJ
Quest Dgnstics Clncal Labs IncCollegevillePA
Unilab CorporationWest HillsCA
Thaihot Investment Co US LtdIrvineCA
Unity HospitalRochesterNY
US Laboratories IncClearwaterFL
J V Laboratories IncRacineWI
Genomic Health IncRedwood CityCA