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

NAICS 8-Digit Codes for "medical-doctor"

Extended NAICS codes provide more specific industry categories within official 6-digit NAICS classifications, supporting more precise industry segmentation, market research, and business targeting. For official NAICS classification, use the 6-digit NAICS code.

Search this keyword in SIC 6-Digit codes.

companies

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

Industry NAICS 8-Digit U.S. companies Add

Medical Information Services

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-34 companies 186companies

Hospital & Medical Service Plans

Parent: Direct Health and Medical Insurance Carriers

Extended NAICS 524114-03 companies 160companies

Medical Services-Mobile

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-35 companies 67companies

Medical Centers

Parent: General Medical and Surgical Hospitals

Extended NAICS 622110-03 companies 8,248companies

Medical Spas

Parent: Offices of Physical, Occupational and Speech Therapists, and Audiologists

Extended NAICS 621340-13 companies 2,823companies

Medical Groups

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-33 companies 904companies

Schools-Medical

Parent: Colleges, Universities, and Professional Schools

Extended NAICS 611310-08 companies 610companies

Medical Services-Temporary

Parent: Professional Employer Organizations

Extended NAICS 561330-02 companies 63companies

Medical Insurance Plans

Parent: Direct Health and Medical Insurance Carriers

Extended NAICS 524114-07 companies 195companies

Medical Legal Consultants

Parent: Other Scientific and Technical Consulting Services

Extended NAICS 541690-59 companies 63companies

Books-Medical (Retail)

Parent: Book Retailers and News Dealers

Extended NAICS 459210-10 companies 7companies

Medical & Surgical Service Organizations

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-30 companies 422companies

Medical Alarms (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-17 companies 105companies

Medical Records Service

Parent: All Other Support Services

Extended NAICS 561990-16 companies 166companies

Medical Transcription Service

Parent: Document Preparation Services

Extended NAICS 561410-07 companies 172companies

Medical Examinations-Insurance

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-31 companies 134companies

Trucking-Dot Medical Exams

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-61 companies 10companies

Surgical & Medical Plans

Parent: Direct Health and Medical Insurance Carriers

Extended NAICS 524114-10 companies 12companies

Medical Software (Retail)

Parent: Electronics and Appliance Retailers

Extended NAICS 449210-81 companies 278companies

Medical Transportation

Parent: All Other Transit and Ground Passenger Transportation

Extended NAICS 485999-04 companies 493companies

Gas Testing-Medical

Parent: Medical Laboratories

Extended NAICS 621511-17 companies 3companies

Medical Alert Systems

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-58 companies 50companies

Medical Electronics (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-18 companies 26companies

Oxygen-Medical (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-23 companies 50companies

Waste Removal-Medical

Parent: Hazardous Waste Treatment and Disposal

Extended NAICS 562211-05 companies 171companies

Schools-Medical & Dental-Assistants/Tech

Parent: Other Technical and Trade Schools

Extended NAICS 611519-17 companies 129companies

Medical Emergency Training

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-07 companies 494companies

Medical Gas Piping Systs-Install (Manufacturing)

Parent: Iron and Steel Pipe and Tube Manufacturing from Purchased Steel

Extended NAICS 331210-05 companies 10companies

Medical Courier Service

Parent: Couriers and Express Delivery Services

Extended NAICS 492110-06 companies 6companies

Hospitalization Plans-Medical & Surgical

Parent: Direct Health and Medical Insurance Carriers

Extended NAICS 524114-04 companies 285companies

Medical Staff Relief

Parent: Professional Employer Organizations

Extended NAICS 561330-08 companies 124companies

Offices & Clinics Of Doctors-Osteopathy

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-04 companies 104companies

Chiropractic Doctor Info Bureaus

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-05 companies 17companies

Emergency Minor Medical Facilities Services

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-03 companies —

Emergency Industrial Medical Units

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-02 companies —

Laser Medical (Manufacturing)

Parent: Electromedical and Electrotherapeutic Apparatus Manufacturing

Extended NAICS 334510-03 companies 22companies

Emergency Medical & Surgical Service

Parent: General Medical and Surgical Hospitals

Extended NAICS 622110-01 companies —

Gases-Industrial & Medical (Manufacturing)

Parent: Industrial Gas Manufacturing

Extended NAICS 325120-03 companies 74companies

Medical Business Administration

Parent: Office Administrative Services

Extended NAICS 561110-12 companies 317companies

Medical Management Service

Parent: Voluntary Health Organizations

Extended NAICS 813212-02 companies 455companies

Medical Imaging Equipment & Systems (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-37 companies 294companies

Medical Equipment-Rentals

Parent: Other Commercial and Industrial Machinery and Equipment Rental and Leasing

Extended NAICS 532490-06 companies 168companies

Medical Equipment Installation

Parent: Other Building Equipment Contractors

Extended NAICS 238290-15 companies 20companies

Medical Diagnostic Equipment-Mobile

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-15 companies 34companies

Medical Equipment Repairing

Parent: Electronic and Precision Equipment Repair and Maintenance

Extended NAICS 811210-52 companies 201companies

Medical Cleaning Equipment (Manufacturing)

Parent: Surgical and Medical Instrument Manufacturing

Extended NAICS 339112-10 companies 192companies

Drug (Manufacturing) Representatives (Wholesale)

Parent: Wholesale Trade Agents and Brokers

Extended NAICS 425120-48 companies 2companies

Ophthalmologists

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-05 companies 1,492companies

Uniform Supply Service

Parent: Linen Supply

Extended NAICS 812331-07 companies 410companies

Sleep Sensors

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-13 companies 1companies

Hyperbaric Services

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-06 companies 66companies

Physicians & Surgeons Equipment & Supplies (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-28 companies 6,367companies

Physicians/Surgeons Equipment Spec Designed (Manufacturing)

Parent: Surgical and Medical Instrument Manufacturing

Extended NAICS 339112-04 companies 7companies

Hospital Equipment & Supplies (Wholesale)

Parent: Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

Extended NAICS 423450-15 companies 738companies

Hospital Transportation Service

Parent: Support Activities for Rail Transportation

Extended NAICS 488210-02 companies 4companies

Health & Allied Services

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-14 companies 877companies

Health Equipment & Supplies (Wholesale)

Parent: Sporting and Recreational Goods and Supplies Merchant Wholesalers

Extended NAICS 423910-25 companies 43companies

Physicians & Surgeons Equipment & Supplies (Manufacturing)

Parent: Surgical and Medical Instrument Manufacturing

Extended NAICS 339112-03 companies 1,441companies

Hospital Service Organizations

Parent: Other Individual and Family Services

Extended NAICS 624190-37 companies 14companies

Ambulance Service

Parent: Ambulance Services

Extended NAICS 621910-02 companies 4,000companies

Health Equipment & Supplies (Manufacturing)

Parent: Sporting and Athletic Goods Manufacturing

Extended NAICS 339920-16 companies 47companies

Engineers-Biomedical

Parent: Research and Development in Biotechnology (except Nanobiotechnology)

Extended NAICS 541714-17 companies 73companies

Air Ambulance Service

Parent: Ambulance Services

Extended NAICS 621910-01 companies 312companies

Health Care Utilization Review

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-16 companies 12companies

Health Recording Service

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-20 companies 5companies

Hospital Equipment & Supplies (Manufacturing)

Parent: Surgical and Medical Instrument Manufacturing

Extended NAICS 339112-01 companies 758companies

Nurses Supplies (Retail)

Parent: Clothing and Clothing Accessories Retailers

Extended NAICS 458110-70 companies —

Ambulette Service

Parent: Ambulance Services

Extended NAICS 621910-03 companies 44companies

Rescue Squads

Parent: Ambulance Services

Extended NAICS 621910-04 companies 309companies

Surgical Appliances (Manufacturing)

Parent: Surgical Appliance and Supplies Manufacturing

Extended NAICS 339113-18 companies 851companies

Nephrology

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-18 companies 485companies

Physicians/Surgeons DPM Podiatrist Exchg

Parent: Offices of Podiatrists

Extended NAICS 621391-01 companies 19companies

Oculists MD

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-03 companies 24companies

Physicians & Surgeons

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-07 companies 876,501companies

Oncologists

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-16 companies 1,311companies

Outpatient Services

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-07 companies 1,364companies

Specialty Outpatient Clinics NEC

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-09 companies 289companies

Health Services

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-21 companies 33,853companies

Hospitals

Parent: General Medical and Surgical Hospitals

Extended NAICS 622110-02 companies 4,752companies

Physician & Surgeon Recruitment

Parent: Employment Placement Agencies

Extended NAICS 561311-08 companies 61companies

Physicians & Surgeons Information Bureau

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-46 companies 214companies

Preferred Provider Organizations

Parent: Direct Health and Medical Insurance Carriers

Extended NAICS 524114-09 companies 16companies

Laboratories-Biological

Parent: Medical Laboratories

Extended NAICS 621511-04 companies 49companies

Health Plans

Parent: Direct Health and Medical Insurance Carriers

Extended NAICS 524114-02 companies 344companies

Sanitariums

Parent: Psychiatric and Substance Abuse Hospitals

Extended NAICS 622210-04 companies 7companies

University/College-Graduate Schools

Parent: Colleges, Universities, and Professional Schools

Extended NAICS 611310-17 companies 249companies

Allergy Physicians

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-11 companies 734companies

Orthopedic Surgeons

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-19 companies 2,286companies

House Calls Physicians

Parent: Freestanding Ambulatory Surgical and Emergency Centers

Extended NAICS 621493-03 companies —

Dermatologists

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-02 companies 2,555companies

Neonatologists

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-15 companies 151companies

Podiatrists

Parent: Offices of Podiatrists

Extended NAICS 621391-03 companies 19,303companies

Clinics

Parent: Freestanding Ambulatory Surgical and Emergency Centers

Extended NAICS 621493-01 companies —

Veterinarians-DVM-Vmd-Microbiologists

Parent: Veterinary Services

Extended NAICS 541940-23 companies 2companies

Veterinarians

Parent: Veterinary Services

Extended NAICS 541940-09 companies 22,341companies

Optical Laboratories (Retail)

Parent: Medical Laboratories

Extended NAICS 621511-18 companies 14companies

Laser Vision Correction

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-59 companies 298companies

Otorhinolaryngology Ear Nose Physician

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-09 companies 634companies

Infertility Treatment

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-09 companies 244companies

Uniforms-Men's & Women's (Wholesale)

Parent: Clothing and Clothing Accessories Merchant Wholesalers

Extended NAICS 424350-70 companies 23companies

Homeopaths

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-11 companies 66companies

Uniforms-Accessories (Wholesale)

Parent: Clothing and Clothing Accessories Merchant Wholesalers

Extended NAICS 424350-69 companies 3companies

Podiatrist Clinics

Parent: Offices of Podiatrists

Extended NAICS 621391-02 companies 46companies

Fibromyalgia Diagnosis & Treatment

Parent: Medical Laboratories

Extended NAICS 621511-23 companies 2companies

Pathologists

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-06 companies 1,062companies

Anesthetists

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-01 companies 1,030companies

Pediatric Neurology

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-21 companies 257companies

Hormone Therapy

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-22 companies 114companies

Prostate Screening

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-23 companies —

Balance Centers

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-27 companies 14companies

Imrt (Intnsty Modulated Radiation Thrpy)

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-28 companies 7companies

Cosmetic Plastic/Reconstructive Surgery

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-10 companies 1,372companies

Health Screening & Vaccination Services

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-24 companies 160companies

In-Patient Clinics & Treatment Ctr

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-25 companies 23companies

Chiropractors DC

Parent: Offices of Chiropractors

Extended NAICS 621310-02 companies 74,123companies

Surgical Centers

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-10 companies —

Industrial Medicine

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-11 companies 8companies

Pulmonary & Respiratory Diseases

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-17 companies 387companies

Hand Surgery

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-20 companies 36companies

Podiatric Sports Medicine

Parent: Offices of Podiatrists

Extended NAICS 621391-05 companies 8companies

Coat & Apron Supply Service

Parent: Linen Supply

Extended NAICS 812331-01 companies 2companies

Law Schools

Parent: Colleges, Universities, and Professional Schools

Extended NAICS 611310-04 companies 156companies

Colonic Therapy-Apparatus & Supplies (Manufacturing)

Parent: Surgical Appliance and Supplies Manufacturing

Extended NAICS 339113-05 companies 4companies

State Government-Licensing & Inspection

Parent: Regulation, Licensing, and Inspection of Miscellaneous Commercial Sectors

Extended NAICS 926150-04 companies —

Pharmacuetical Kiosk (Retail)

Parent: Pharmacies and Drug Retailers

Extended NAICS 456110-15 companies 11companies

Physical Therapy Schools

Parent: Other Technical and Trade Schools

Extended NAICS 611519-13 companies 14companies

Health Related Facilities

Parent: Outpatient Mental Health and Substance Abuse Centers

Extended NAICS 621420-01 companies 37companies

Physicians Assistants

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-32 companies 98,307companies

Physicians & Surgeons-Emergency Service

Parent: Freestanding Ambulatory Surgical and Emergency Centers

Extended NAICS 621493-02 companies —

Specialty Hospitals-Except Psychiatric

Parent: Specialty (except Psychiatric and Substance Abuse) Hospitals

Extended NAICS 622310-07 companies 156companies

First Aid Supplies (Manufacturing)

Parent: Surgical Appliance and Supplies Manufacturing

Extended NAICS 339113-07 companies 7companies

Insurance-Cancer

Parent: Direct Health and Medical Insurance Carriers

Extended NAICS 524114-05 companies 20companies

Optical Goods (Wholesale)

Parent: Ophthalmic Goods Merchant Wholesalers

Extended NAICS 423460-07 companies 176companies

Offices Of Health Practitioners NEC

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-26 companies 2,011companies

Physicians-Naturopathic

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-33 companies 2,055companies

Neuropaths

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-19 companies 36companies

Optometrists OD-Geriatric Optometry

Parent: Offices of Optometrists

Extended NAICS 621320-05 companies 35companies

Lyme Disease-Information & Services

Parent: Offices of Mental Health Practitioners (except Physicians)

Extended NAICS 621330-06 companies 4companies

Contact Lenses-Optometrists

Parent: Offices of Optometrists

Extended NAICS 621320-01 companies 49companies

Optometrists OD

Parent: Offices of Optometrists

Extended NAICS 621320-03 companies 46,865companies

Optometrists OD-Childrens Vision

Parent: Offices of Optometrists

Extended NAICS 621320-04 companies 13companies

Optometrists OD-Therapy Visual Training

Parent: Offices of Optometrists

Extended NAICS 621320-06 companies 77companies

Optometrists OD Developmental Vision

Parent: Offices of Optometrists

Extended NAICS 621320-07 companies 6companies

Health Maintenance Organizations

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-19 companies 171companies

Physicians-Oriental Medicine

Parent: Offices of All Other Miscellaneous Health Practitioners

Extended NAICS 621399-52 companies 58companies

Dentists

Parent: Offices of Dentists

Extended NAICS 621210-03 companies 225,415companies

Holistic Practitioners

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-26 companies —

Optometrists Referral & Info Service

Parent: All Other Miscellaneous Ambulatory Health Care Services

Extended NAICS 621999-39 companies 16companies

Body Movement Education

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-01 companies 10companies

Eyesight Training

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-04 companies 30companies

Hair Clinics

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-05 companies 29companies

Respiratory Therapy

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-08 companies 23companies

Integrated Medicine

Parent: All Other Outpatient Care Centers

Extended NAICS 621498-12 companies 38companies

Dental Technicians

Parent: Offices of Dentists

Extended NAICS 621210-02 companies 4companies

Cosmetic Dentistry

Parent: Offices of Dentists

Extended NAICS 621210-04 companies 969companies

Dental Spas

Parent: Offices of Dentists

Extended NAICS 621210-05 companies 8companies

Dental Surgeons

Parent: Offices of Dentists

Extended NAICS 621210-06 companies 542companies

Acupuncture Chiropractors

Parent: Offices of Chiropractors

Extended NAICS 621310-01 companies 41companies

Emergency Chiropractic Service

Parent: Offices of Chiropractors

Extended NAICS 621310-03 companies 24companies

Spinologists

Parent: Offices of Chiropractors

Extended NAICS 621310-04 companies 9companies

Eyes-Human Prosthetic

Parent: Offices of Optometrists

Extended NAICS 621320-02 companies 31companies

Sports Medicine & Injuries

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-08 companies 1,325companies

Preventive Medicine

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-13 companies 56companies

Endermologie

Parent: Offices of Physicians (except Mental Health Specialists)

Extended NAICS 621111-14 companies 1companies

Psychiatry-Adult Child & Adolescent

Parent: Offices of Physicians, Mental Health Specialists

Extended NAICS 621112-07 companies 1,873companies

Psychoanalysts

Parent: Offices of Physicians, Mental Health Specialists

Extended NAICS 621112-08 companies 326companies

Podiatrists Information Bureaus

Parent: Offices of Podiatrists

Extended NAICS 621391-04 companies 5companies

Commercial Printing-Gravure (Manufacturing)

Parent: Commercial Printing (except Screen and Books)

Extended NAICS 323111-14 companies 12companies

Rotogravure Printers (Manufacturing)

Parent: Commercial Printing (except Screen and Books)

Extended NAICS 323111-18 companies —

Printers-Cellophane/Foil & Etc (Manufacturing)

Parent: Commercial Printing (except Screen and Books)

Extended NAICS 323111-21 companies 3companies

Bands & Wrappers-Printed (Manufacturing)

Parent: Commercial Printing (except Screen and Books)

Extended NAICS 323111-42 companies 2companies

Bottle Wrappers (Manufacturing)

Parent: Commercial Printing (except Screen and Books)

Extended NAICS 323111-44 companies 1companies

Travelers' Hlth Counseling/Vaccinations

Parent: Other Individual and Family Services

Extended NAICS 624190-26 companies 10companies

Veterinarian Referral/Information Services

Parent: Veterinary Services

Extended NAICS 541940-08 companies 42companies

Other classifications

Search "medical-doctor" in SIC 6-Digit codes →

Sources & methodology

NAICS definitions: U.S. Census Bureau, 2022

SIC definitions: OSHA SIC Manual

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