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What Is an SIC 6-Digit Code?
All NAICS SIC Companies
SIC 6-Digit NAICS 8-Digit ISIC (International) NACE (Europe) SOC (Occupations) Extended SOC (O*NET)

SIC 6-Digit Codes for "diagnostics"

SIC Marketing Level codes provide more specific industry categories within official 4-digit SIC classifications, supporting more precise industry segmentation, market research, and business targeting. For official SIC classification, use the 4-digit SIC code.

Search this keyword in NAICS 8-Digit codes.

companies

Verified U.S. companies available for purchase in this industry. Counts are based on primary business classifications.

Industry SIC 6-Digit U.S. companies Add

Diagnostic Imaging Centers

Parent: Medical Laboratories

SIC Marketing Level 8071-29 companies 4,474companies

Automobile Diagnostic Service

Parent: Automotive Services, except Repair and Carwashes

Matches: Engine Diagnostics

SIC Marketing Level 7549-07 companies 301companies

Engine Diagnostic Service

Parent: Automotive Services, except Repair and Carwashes

Matches: Engine Diagnostics

SIC Marketing Level 7549-28 companies 10companies

In-Vitro/In-Vivo Diagnostic Sbstnc (Manufacturing)

Parent: In Vitro and In Vivo Diagnostic Substances

SIC Marketing Level 2835-98 companies 177companies

Automobile Diagnostic Equipment (Wholesale)

Parent: Motor Vehicle Supplies and New Parts

SIC Marketing Level 5013-31 companies 43companies

Automobile Diagnostic Service Equipment (Manufacturing)

Parent: Instruments for Measuring and Testing of Electricity and Electrical Signals

SIC Marketing Level 3825-04 companies 7companies

Sleep Disorders-Diagnostic/Treatment

Parent: Health and Allied Services, Not Elsewhere Classified

SIC Marketing Level 8099-74 companies 1,274companies

Medical Diagnostic Equipment-Mobile

Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified

SIC Marketing Level 8049-29 companies 34companies

Automobile Repairing & Service

Parent: General Automotive Repair Shops

Matches: Engine diagnostics

SIC Marketing Level 7538-01 companies 78,104companies

Automobile Repairing & Service-Mobile

Parent: General Automotive Repair Shops

Matches: The Automobile Repairing & Service-Mobile industry involves the repair and maintenance of automobiles...

SIC Marketing Level 7538-19 companies 452companies

X-Ray Laboratories-Dental

Parent: Medical Laboratories

Matches: Dental Radiology Diagnostics

SIC Marketing Level 8071-02 companies 14companies

Battery & Ignition Service

Parent: General Automotive Repair Shops

Matches: Electrical system diagnostics

SIC Marketing Level 7538-31 companies 16companies

Veterinary Medical Laboratories

Parent: Testing Laboratories

Matches: Veterinary Medical Laboratories are facilities that specialize in testing and analyzing samples from...

SIC Marketing Level 8734-29 companies 11companies

Laboratories-Medical

Parent: Medical Laboratories

Matches: Molecular diagnostics laboratories

SIC Marketing Level 8071-01 companies 6,288companies

Laboratories-Biochemical

Parent: Commercial Physical and Biological Research

Matches: Veterinary diagnostics

SIC Marketing Level 8731-24 companies 27companies

Allergy Laboratories (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-08 companies 4companies

Veterinarians-Pathologists

Parent: Veterinary Services for Animal Specialties

SIC Marketing Level 0742-21 companies 1companies

Laboratories-Biological

Parent: Medical Laboratories

Matches: Medical diagnostics

SIC Marketing Level 8071-07 companies 49companies

Medical Software (Retail)

Parent: Computer and Computer Software Stores

Matches: Medical Imaging and Diagnostics

SIC Marketing Level 5734-16 companies 278companies

Fuel-Economizers

Parent: Automotive Repair Shops, Not Elsewhere Classified

Matches: Engine tuning and diagnostics

SIC Marketing Level 7539-07 companies 9companies

Measuring Analyzing & Controlling Instrs (Manufacturing)

Parent: Industrial Instruments for Measurement, Display, and Control of Process Variables; and Related Products

Matches: Medical diagnostics

SIC Marketing Level 3823-18 companies 414companies

Engines-Diesel-Fuel Injection-Service & Repair

Parent: General Automotive Repair Shops

Matches: Diesel engine diagnostics

SIC Marketing Level 7538-07 companies 98companies

Microbiologists

Parent: Medical Laboratories

Matches: Medical diagnostics industry

SIC Marketing Level 8071-14 companies 13companies

Genetics Medical

Parent: Noncommercial Research Organizations

Matches: Molecular diagnostics

SIC Marketing Level 8733-15 companies 102companies

Carburetors

Parent: Automotive Repair Shops, Not Elsewhere Classified

Matches: Carburetor diagnostics

SIC Marketing Level 7539-19 companies 95companies

Turbines (Wholesale)

Parent: Electrical Apparatus and Equipment Wiring Supplies, and Construction Materials

Matches: Turbine sensors for monitoring and diagnostics

SIC Marketing Level 5063-82 companies 14companies

Pharmaceutical Preparation (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-98 companies 913companies

Veterinarians-Radiologists

Parent: Veterinary Services for Animal Specialties

SIC Marketing Level 0742-14 companies 9companies

Audiometers (Wholesale)

Parent: Transportation Equipment and Supplies, except Motor Vehicles

SIC Marketing Level 5088-18 companies 4companies

Electronic Instruments (Manufacturing)

Parent: Electronic Components, Not Elsewhere Classified

SIC Marketing Level 3679-05 companies 55companies

Medical Electronics (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies

SIC Marketing Level 5047-31 companies 26companies

Radiology Schools

Parent: Colleges, Universities, and Professional Schools

SIC Marketing Level 8221-06 companies 11companies

Starters-Automotive Repairing

Parent: Automotive Repair Shops, Not Elsewhere Classified

SIC Marketing Level 7539-35 companies 4companies

Biotechnology Products & Services

Parent: Commercial Physical and Biological Research

SIC Marketing Level 8731-26 companies 1,983companies

Pharmaceutical Products (Wholesale)

Parent: Drugs, Drug Proprietaries, and Druggists' Sundries

SIC Marketing Level 5122-03 companies 1,480companies

Health Facilities

Parent: Nursing and Personal Care Facilities, Not Elsewhere Classified

SIC Marketing Level 8059-05 companies 389companies

Animal Health Products (Manufacturing)

Parent: Prepared Feed and Feed Ingredients for Animals and Fowls, except Dogs and Cats

SIC Marketing Level 2048-01 companies 101companies

X-Ray Duplicating Service

Parent: Photocopying and Duplicating Services

SIC Marketing Level 7334-07 companies 4companies

Paramedical Services

Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified

SIC Marketing Level 8049-16 companies 17companies

Eyeglasses/Contact Lenses (Wholesale)/Mfr Equip

Parent: Ophthalmic Goods

SIC Marketing Level 5048-11 companies 128companies

Enzymes (Manufacturing)

Parent: Pesticides and Agricultural Chemicals, Not Elsewhere Classified

SIC Marketing Level 2879-03 companies 13companies

Health Appliances (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies

SIC Marketing Level 5047-10 companies 10companies

Automobile Shock Absorbers

Parent: Automotive Repair Shops, Not Elsewhere Classified

SIC Marketing Level 7539-22 companies 2companies

Laboratory Analytical Instruments (Manufacturing)

Parent: Laboratory Analytical Instruments

SIC Marketing Level 3826-98 companies 677companies

Auto Inspection Sta Equipment Supplies (Wholesale)

Parent: Service Establishment Equipment and Supplies

SIC Marketing Level 5087-73 companies 6companies

Hospital Equipment & Supplies (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies

SIC Marketing Level 5047-12 companies 738companies

Veterinarians Equipment & Supplies (Wholesale)

Parent: Service Establishment Equipment and Supplies

SIC Marketing Level 5087-46 companies 142companies

Medical Imaging Equipment & Systems (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies

SIC Marketing Level 5047-20 companies 294companies

Ophthalmic Instruments & Equipment (Wholesale)

Parent: Ophthalmic Goods

SIC Marketing Level 5048-08 companies 63companies

Health Equipment & Supplies (Wholesale)

Parent: Sporting and Recreational Goods and Supplies

SIC Marketing Level 5091-48 companies 43companies

Hospital Equipment & Supplies (Manufacturing)

Parent: Surgical and Medical Instruments and Apparatus

SIC Marketing Level 3841-03 companies 758companies

Surgical/Med Instruments/Apparatus (Manufacturing)

Parent: Surgical and Medical Instruments and Apparatus

SIC Marketing Level 3841-98 companies 621companies

Scientific Apparatus & Instruments (Manufacturing)

Parent: Glass Products, Made of Purchased Glass

SIC Marketing Level 3231-12 companies 80companies

Veterinarians Equipment & Supplies (Manufacturing)

Parent: Surgical and Medical Instruments and Apparatus

SIC Marketing Level 3841-11 companies 34companies

Physicians & Surgeons Equipment & Supplies (Manufacturing)

Parent: Surgical and Medical Instruments and Apparatus

SIC Marketing Level 3841-04 companies 1,441companies

Medical Equipment-Rentals

Parent: Medical Equipment Rental and Leasing

SIC Marketing Level 7352-06 companies 168companies

Automobile (Manufacturing) Equipment & Supplies (Wholesale)

Parent: Motor Vehicle Supplies and New Parts

SIC Marketing Level 5013-20 companies 50companies

Pharmaceutical Cntnrs Equipment Supplies (Manufacturing)

Parent: Plastics Products, Not Elsewhere Classified

SIC Marketing Level 3089-16 companies 40companies

Garage Equipment (Wholesale)

Parent: Motor Vehicle Supplies and New Parts

SIC Marketing Level 5013-64 companies 7companies

Automobile Body Shop Equipment (Manufacturing)

Parent: Special Industry Machinery, Not Elsewhere Classified

SIC Marketing Level 3559-04 companies 351companies

Automobile Machine Shop Equipment Supplies (Manufacturing)

Parent: Cutting Tools, Machine Tool Accessories, and Machinists' Precision Measuring Devices

SIC Marketing Level 3545-03 companies 164companies

Service Station Equipment (Wholesale)

Parent: Petroleum and Petroleum Products Wholesalers, except Bulk Stations and Terminals

SIC Marketing Level 5172-02 companies 237companies

Wheel Alignment-Frame Service Equipment (Manufacturing)

Parent: Special Industry Machinery, Not Elsewhere Classified

SIC Marketing Level 3559-03 companies 21companies

Fuel Injection Equipment & Service (Manufacturing)

Parent: Motor Vehicle Parts and Accessories

SIC Marketing Level 3714-06 companies 11companies

Vehicle Emission Testing-Service & Repair

Parent: Automotive Services, except Repair and Carwashes

Matches: Vehicle Emission Testing-Service & Repair is a specialized industry that focuses on testing and repairing...

SIC Marketing Level 7549-22 companies 32companies

Fuel Injection Equipment (Repairing)

Parent: Automotive Repair Shops, Not Elsewhere Classified

Matches: Fuel Injection Equipment (Repairing) is a specialized industry that deals with the repair and maintenance...

SIC Marketing Level 7539-06 companies 55companies

Automobile Repair/Service Equipment & Supplies (Manufacturing)

Parent: Motor Vehicle Parts and Accessories

SIC Marketing Level 3714-04 companies 1,629companies

Imported Automobile Services

Parent: General Automotive Repair Shops

SIC Marketing Level 7538-16 companies 67companies

Veterinary Pharmacies & Services

Parent: Animal Specialty Services, except Veterinary

SIC Marketing Level 0752-31 companies 545companies

Lyme Disease-Information & Services

Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified

SIC Marketing Level 8049-78 companies 4companies

X-Ray Laboratories Medical & Dental

Parent: Medical Laboratories

SIC Marketing Level 8071-03 companies 141companies

Outpatient Services

Parent: Specialty Outpatient Facilities, Not Elsewhere Classified

SIC Marketing Level 8093-03 companies 1,364companies

Medical & Surgical Service Organizations

Parent: Health and Allied Services, Not Elsewhere Classified

SIC Marketing Level 8099-13 companies 422companies

Endoscopy Centers

Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified

SIC Marketing Level 8049-76 companies 78companies

Biological Specimens (Manufacturing)

Parent: Biological Products, except Diagnostic Substances

SIC Marketing Level 2836-02 companies 15companies

Physicians Assistants

Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified

SIC Marketing Level 8049-20 companies 98,306companies

Clinics

Parent: Offices and Clinics of Doctors of Medicine

SIC Marketing Level 8011-04 companies 56,352companies

Laboratories-Veterinary

Parent: Testing Laboratories

SIC Marketing Level 8734-11 companies 84companies

Fibromyalgia Diagnosis & Treatment

Parent: Medical Laboratories

SIC Marketing Level 8071-26 companies 2companies

Nurses-Registered RN

Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified

SIC Marketing Level 8049-08 companies 51,550companies

Infertility Treatment

Parent: Offices and Clinics of Health Practitioners, Not Elsewhere Classified

SIC Marketing Level 8049-71 companies 244companies

Podiatrists Equipment & Supplies (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies

SIC Marketing Level 5047-21 companies 127companies

Health Related Facilities

Parent: Specialty Outpatient Facilities, Not Elsewhere Classified

SIC Marketing Level 8093-06 companies 37companies

Preferred Provider Organizations

Parent: Hospital and Medical Service Plans

SIC Marketing Level 6324-03 companies 16companies

Balance Centers

Parent: Offices and Clinics of Doctors of Medicine

SIC Marketing Level 8011-35 companies 14companies

Veterinarians-Cardiologists

Parent: Veterinary Services for Animal Specialties

SIC Marketing Level 0742-15 companies 12companies

Veterinarians-Neurologist

Parent: Veterinary Services for Animal Specialties

SIC Marketing Level 0742-13 companies 10companies

Bird Hospitals

Parent: Veterinary Services for Animal Specialties

SIC Marketing Level 0742-05 companies 2companies

Automobile Emission Testing

Parent: Automotive Services, except Repair and Carwashes

SIC Marketing Level 7549-18 companies 173companies

Automobile-New Car Pre-Delivery Service

Parent: Top, Body, and Upholstery Repair Shops and Paint Shops

SIC Marketing Level 7532-20 companies 6companies

Wheel Chair Van Lifts

Parent: Top, Body, and Upholstery Repair Shops and Paint Shops

SIC Marketing Level 7532-09 companies 9companies

Drug Millers (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-04 companies 375companies

Drug (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-01 companies 195companies

Laboratories-Pharmaceutical (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-07 companies 110companies

Nuclear Medicine Supplies & Acces (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-13 companies 50companies

Vitamin Products (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-03 companies 35companies

Medications Wholesale (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-14 companies 11companies

Medicines-Patent (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-06 companies 9companies

Poultry Medicines & Vaccines (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-02 companies 7companies

Zinc Oxide (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-05 companies 6companies

Water Deionization (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-11 companies 6companies

Tablet Makers-Pharm-Food Etc (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-10 companies 4companies

Water Scale Removers (Manufacturing)

Parent: Pharmaceutical Preparations

SIC Marketing Level 2834-12 companies 1companies

Biological Products (Manufacturing)

Parent: Biological Products, except Diagnostic Substances

SIC Marketing Level 2836-01 companies 487companies

Real Estate Maintenance Protection Plans

Parent: Insurance Carriers, Not Elsewhere Classified

SIC Marketing Level 6399-01 companies 10companies

Marine Repairs

Parent: Marinas

SIC Marketing Level 4493-05 companies 125companies

Automobile Dealers-New Cars (Retail)

Parent: Motor Vehicle Dealers (New and Used)

SIC Marketing Level 5511-02 companies 17,126companies

Cranes Repairing

Parent: Repair Shops and Related Services, Not Elsewhere Classified

SIC Marketing Level 7699-18 companies 38companies

Tractor Repairing & Service

Parent: Repair Shops and Related Services, Not Elsewhere Classified

SIC Marketing Level 7699-41 companies 377companies

Psychiatry-Adult Child & Adolescent

Parent: Offices and Clinics of Doctors of Medicine

SIC Marketing Level 8011-13 companies 1,873companies

Veterinarians-Surgeons

Parent: Veterinary Services for Animal Specialties

SIC Marketing Level 0742-10 companies 18companies

Wrecker Bodies & Equipment

Parent: Wrecking and Demolition Work

SIC Marketing Level 1795-03 companies 1companies

Elevators Repairing

Parent: Installation or Erection of Building Equipment, Not Elsewhere Classified

SIC Marketing Level 1796-01 companies 84companies

Service Station Equipment-Servicing

Parent: Special Trade Contractors, Not Elsewhere Classified

SIC Marketing Level 1799-15 companies 19companies

Lifts-Manned

Parent: Special Trade Contractors, Not Elsewhere Classified

SIC Marketing Level 1799-87 companies 5companies

Farm Equipment Repairing & Parts (Manufacturing)

Parent: Farm Machinery and Equipment

SIC Marketing Level 3523-07 companies 21companies

Automobile Wreckers (Manufacturing)

Parent: Truck and Bus Bodies

SIC Marketing Level 3713-02 companies 90companies

Yachts Repairing (Manufacturing)

Parent: Boat Building and Repairing

SIC Marketing Level 3732-07 companies 33companies

Watercraft-Personal-Service Repair (Manufacturing)

Parent: Boat Building and Repairing

SIC Marketing Level 3732-08 companies 32companies

Locomotive Rebuilding (Manufacturing)

Parent: Railroad Equipment

SIC Marketing Level 3743-06 companies 8companies

Health Equipment & Supplies (Manufacturing)

Parent: Sporting and Athletic Goods, Not Elsewhere Classified

SIC Marketing Level 3949-17 companies 47companies

Limousine Service

Parent: Local Passenger Transportation, Not Elsewhere Classified

SIC Marketing Level 4119-03 companies 5,696companies

Car Service

Parent: Local Passenger Transportation, Not Elsewhere Classified

SIC Marketing Level 4119-04 companies 469companies

Trucking-Dump

Parent: Local Trucking without Storage

SIC Marketing Level 4212-10 companies 621companies

Petroleum Products-Transporting

Parent: Local Trucking without Storage

SIC Marketing Level 4212-29 companies 46companies

Tools-Stored

Parent: General Warehousing and Storage

SIC Marketing Level 4225-11 companies 1companies

Storage-Vehicles-Trailers

Parent: Special Warehousing and Storage, Not Elsewhere Classified

SIC Marketing Level 4226-17 companies 17companies

Truck Terminals

Parent: Terminal and Joint Terminal Maintenance Facilities for Motor Freight Transportation

SIC Marketing Level 4231-01 companies 22companies

Boat Yards

Parent: Marinas

SIC Marketing Level 4493-03 companies 107companies

Boat Repairing

Parent: Marinas

SIC Marketing Level 4493-04 companies 1,832companies

Snowcat Rentals

Parent: Tour Operators

SIC Marketing Level 4725-10 companies 1companies

Other classifications

Search "diagnostics" in Extended NAICS →

Sources & methodology

NAICS definitions: U.S. Census Bureau, 2022

SIC definitions: OSHA SIC Manual

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