The health care field is massive, spanning hospitals, insurance, biotech, pharmaceuticals, medical devices, and telehealth. Whether you’re a job seeker, investor, or just curious about the sector, knowing what companies are in the health care field is key to understanding this essential industry.
List of the Top Health Care Companies in the U.S.
| Company Name | Approx. Number of Employees | What They Do |
|---|---|---|
| HCA Healthcare | 280,000 | Operates hospitals and outpatient centers across the U.S., providing comprehensive patient care |
| Cleveland Clinic | 67,000 | World-renowned hospital network specializing in heart, cancer, and research-focused care |
| Mayo Clinic | 70,000 | Provides patient care, research, and education with a global reputation for excellence |
| UnitedHealth Group | 400,000 | Health insurance and services through UnitedHealthcare and Optum, serving millions of Americans |
| Anthem Inc. | 83,000 | Offers individual and group health insurance plans across multiple states |
| Cigna | 74,000 | Global health insurance provider with a focus on wellness and preventive care programs |
| Pfizer | 80,000 | Develops pharmaceuticals and vaccines, including treatments for oncology, infectious diseases, and rare conditions |
| Johnson & Johnson | 134,000 | Operates in pharmaceuticals, consumer health products, and medical devices |
| Merck & Co. | 69,000 | Develops vaccines, oncology, and infectious disease treatments worldwide |
| Amgen | 25,000 | Biotech company focused on biologic therapies for cancer, kidney disease, and autoimmune disorders |
| Gilead Sciences | 14,000 | Develops antiviral drugs and treatments for chronic and infectious diseases |
| Biogen | 7,800 | Specializes in neurological and neurodegenerative disease therapies |
| Medtronic | 95,000 | Designs and manufactures medical devices, including pacemakers and insulin pumps |
| Boston Scientific | 36,000 | Develops medical devices for cardiology, urology, and other specialties |
| Stryker | 45,000 | Orthopedic implants, surgical equipment, and other medical technologies |
| Teladoc Health | 7,500 | Provides telehealth services, virtual care, and chronic condition management |
| Amwell | 1,500 | Connects patients with doctors for online visits and telemedicine services |
| Livongo (Teladoc) | 1,000 | Digital platform for chronic condition management, now part of Teladoc |
| Kaiser Permanente | 217,000 | Integrated health system offering insurance coverage, hospitals, and outpatient services |
| CVS Health | 300,000 | Operates retail pharmacies, clinics, and provides insurance via Aetna, offering integrated care |
Top Performing Health Care Companies in the US
Intuitive Surgical
Intuitive Surgical is the maker of the da Vinci Surgical System, a breakthrough in robotic-assisted surgery. The company is known for innovation, steady revenue growth, and a culture that invests heavily in employee training and development. Careers here span engineering, clinical support, and global operations — ideal for those interested in medical technology and automation.
Vertex Pharmaceuticals
Vertex focuses on developing transformative treatments for cystic fibrosis and other serious genetic diseases. Its pipeline is strong, and the company invests heavily in research and development. Employees praise the mission-driven culture, collaborative teams, and focus on professional growth.
Moderna
Moderna is a pioneer in mRNA technology, building on its COVID-19 vaccine success to develop therapies for cancer, rare diseases, and infectious diseases. The company offers competitive compensation, stock options, and career mobility. Its rapid expansion makes it one of the hottest biotech companies to join right now.
Regeneron Pharmaceuticals
Regeneron is a leader in genetics-driven drug discovery, creating therapies for eye diseases, cancer, and immune disorders. Its workplace culture encourages collaboration between scientists, engineers, and data experts, making it a top choice for employees seeking innovation and stability.
Dexcom
Dexcom is revolutionizing diabetes care with its continuous glucose monitoring (CGM) systems. The company has seen rapid revenue growth thanks to rising global diabetes rates. Employees enjoy working on life-changing technology, competitive pay, and a mission-driven environment.
Illumina
Illumina is a global leader in genomics and DNA sequencing technology. Its solutions power precision medicine, cancer research, and population genomics. Illumina is consistently ranked as one of the best places to work, offering strong employee benefits, research opportunities, and a culture of innovation.
Cardinal Health
Cardinal Health plays a vital role as a health care distributor, supporting hospitals, pharmacies, and clinics with medical products and logistics solutions. With a stable business model and strong growth outlook, Cardinal Health offers career paths in supply chain management, operations, IT, and sales.
Zimmer Biomet
Zimmer Biomet is a leader in musculoskeletal health solutions, including joint replacements and surgical products. Known for excellent training programs and global career mobility, it’s a great option for those interested in engineering, manufacturing, and orthopedic innovation.
Humana
Humana is one of the largest health insurers in the U.S., with a strong focus on value-based care and digital health innovation. It invests heavily in telehealth, preventive care, and employee wellness, making it a highly rated workplace for work-life balance and career development.
CVS Health (and Aetna)
CVS Health combines retail pharmacy, insurance (Aetna), and primary care services to offer integrated health solutions. Employees benefit from a wide range of career paths in pharmacy, digital health, and corporate roles, along with a strong focus on growth and innovation in health services.
Abbott Laboratories
Abbott is a diversified global health care company producing diagnostics, medical devices, nutrition products, and branded generics. It has been consistently ranked among the most admired companies for employee experience and is growing its presence in diagnostics and diabetes care technology.
Gilead Sciences
Gilead is a biopharmaceutical leader specializing in antiviral drugs, including treatments for HIV, hepatitis, and COVID-19. Known for competitive pay and benefits, Gilead offers a strong pipeline of innovative therapies and opportunities for scientists and researchers.
Edwards Lifesciences
Edwards is focused on heart valve therapies and critical care monitoring solutions. Its work is at the forefront of cardiovascular innovation, and employees benefit from working on products that save lives and improve patient outcomes worldwide.
Boston Scientific
Boston Scientific designs medical devices for cardiology, endoscopy, and neuromodulation. The company is experiencing strong growth as demand rises for minimally invasive procedures and offers excellent career development programs for engineers, marketers, and clinical specialists.
DaVita Inc.
DaVita is one of the largest providers of kidney care and dialysis services in the U.S. The company invests in employee training and patient-centered care, making it a top choice for those interested in clinical and patient support careers.
Why Knowing These Health Care Companies Matters
Understanding what companies are in the health care field isn’t just trivia — it’s a strategic advantage.
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For Job Seekers: You can target employers that align with your values, whether that’s cutting-edge biotech, telehealth innovation, or patient-centered hospital care.
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For Investors: Knowing which companies are growing, expanding into AI, and dominating their niche helps you make informed investment decisions.
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For Consumers & Patients: Awareness of top players in insurance, medical devices, and telemedicine means you can make better choices about coverage, treatment, and wellness services.
These companies aren’t just businesses — they are the backbone of modern health care, shaping the way we access care, develop treatments, and improve patient outcomes.
The Future of the Health Care Industry
The health care sector is not slowing down — it’s accelerating. In the next decade, we can expect:
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More AI & Automation: Faster drug discovery, better diagnostics, and AI-driven patient care plans.
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Expansion of Telehealth & Digital Health: Greater access for rural areas and a hybrid approach to primary care.
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Personalized Medicine at Scale: Treatments tailored to genetic data becoming the new normal.
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Growing Demand for Home Health: Aging populations driving nursing, therapy, and remote care job growth.
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Focus on Mental Health: Employers, schools, and digital platforms prioritizing mental wellness solutions.
Health care isn’t just one of the largest industries — it’s one of the most future-proof. For professionals, this means job security. For investors, it means opportunity. For patients, it means better, faster, and more personalized care.
Final Thoughts
So, what companies are in the health care field?
From hospital networks like Mayo Clinic and Cleveland Clinic to biotech innovators like Amgen, Vertex, and Moderna, and insurance giants like UnitedHealth Group and Humana, this field is full of organizations shaping the future of medicine.
Whether you are looking for a career path, deciding where to invest, or simply curious about who is leading innovation, knowing the major players gives you a huge advantage. With trends like telehealth expansion, AI-powered diagnostics, and personalized medicine, the health care industry is one of the most exciting, fast-growing sectors to watch.
