| # | Company | Employees |
|---|---|---|
| 1 | 41,860 | |
| 2 |
Highmark Healthhighmarkhealth.org
Provides health insurance, care delivery, population health management, dental solutions, reinsurance, and innovative technology to millions of customers across the nation. |
15,876 |
| 3 |
Allegheny Health Networkahn.org
Integrated healthcare delivery system with hospitals, medical centers, wellness pavilions, and numerous physician practices serving Western Pennsylvania. |
11,676 |
| 4 |
UPMC Children's Hospital of Pittsburghchp.edu
A leader in treating childhood conditions, developing therapies, educating pediatricians, and advancing research with strong community support since 1890 |
3,489 |
| 5 |
St. Clair Healthstclair.org
An independent acute-care medical center in southwestern Pennsylvania, offering a wide range of high-quality health care services to the community |
1,408 |
| 6 |
UPMC Hillman Cancer Centerhillmanresearch.upmc.edu
An NCI-designated cancer center affiliated with a university, providing high-level clinical care, research, and education to cancer patients and professionals |
1,028 |
| 7 |
Upmc Passavantupmc.com
A $23 billion nonprofit health enterprise with 92,000 employees, 40 hospitals, and over 8,000 licensed beds, providing global integrated healthcare services |
590 |
| 8 |
Gateway Health
Coordinating Medicaid and Medicare healthcare services focusing on whole-person care, community outreach, and collaboration with extensive provider networks. |
517 |
| 9 |
Va Pittsburgh Healthcare Systsva.gov
A healthcare system in the tri-state area serving veterans, offering medical, surgical, behavioral health services, as well as community living and recovery centers |
477 |
| 10 |
Oncology Nursing Societyons.org
Professional association of oncology nurses promoting excellence in cancer care through education, conferences, advocacy, and research since 1975 |
449 |
| 11 |
ARAFA MEDICAL MISSION SUPER SPECIALITYHOSPITAL
The largest hospital in the country providing top-quality medical care and services to patients in need of treatment and care |
349 |
| 12 |
Allegheny County Health Departmentalleghenycounty.us
This company is dedicated to protecting and promoting the health and well-being of Allegheny County residents through public health services |
332 |
| 13 |
Highmark Wholecarehighmark.com
Highmark Wholecare provides coordinated Medicaid and Medicare programs focusing on whole person care, working with a network of healthcare providers and supporting community outreach |
328 |
| 14 |
MED3000MED3000.com
A merged company, now under McKesson, offers superior technologies and domain expertise to help providers improve operations for better financial and clinical health |
318 |
| 15 |
Acusis庐acusis.com
Clinical documentation solutions company offering outsourced services to healthcare providers with guaranteed 24/7 report delivery, integration with EMRs, and high quality support for core measures initiatives |
295 |
| 16 |
UPMC Enterprisesenterprises.upmc.com
An organization focused on commercializing innovative healthcare technology to revolutionize care delivery, improve patient experiences, and reduce costs in the industry |
209 |
| 17 |
The Institute for Transfusion Medicineitxm.org
Specializing in transfusion medicine, this organization collects and distributes safe blood products to hospitals and patients worldwide, providing expert support and education |
208 |
| 18 |
Medbillmedbill.net
Medbill offers expert DME/HME billing services, focusing on increasing collections, reducing AR, and minimizing claim denials through accurate payment posting and timely resolutions |
205 |
| 19 |
Center for Organ Recovery & Educationcore.org
A not-for-profit organization coordinating organ, tissue, and cornea transplants through collaboration with donor families, healthcare professionals, and hospitals |
186 |
| 20 |
Adagio Healthadagiohealth.org
Providing high-quality women's healthcare, education, and community services in western Pennsylvania regardless of age or insurance status |
179 |
| 21 |
Grane Rxgranerx.com
Providing pharmacy solutions and services to long-term care communities and PACE providers across multiple U.S. states, enhancing medication adherence and reducing costs. |
171 |
| 22 |
Magee-Womens Research Institute & Foundationmageewomens.org
Pioneering research institute dedicated to women's health, tackling cancer, heart disease, fertility, HIV, Alzheimer's, and more to improve lives |
166 |
| 23 |
Advantagefeeltheadvantage.com
Provider of contract healthcare, nursing, therapy, and social services in patients' homes and outpatient settings Emphasizing high-quality care, innovation, and customization for patient needs |
162 |
| 24 |
Grane Hospicegranehospice.com
Grane Hospice offers personalized and attentive hospice care with a focus on low patient-to-nurse ratios for enhanced support |
152 |
| 25 |
D3 Oncology Solutionsd3onc.com
Developing and delivering cutting-edge solutions to enhance cancer patient care at radiation and medical oncology centers worldwide through collaboration and expertise |
9 |
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 10, 2026.
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