| # | Company | Employees |
|---|---|---|
| 1 |
Mayo Clinicmayoclinic.org
A leading not-for-profit medical practice founded on values of patient-centered care, teamwork, professionalism, and excellence in healthcare services |
48,774 |
| 2 |
Rochester Regional Healthrochesterregional.org
A physician-led integrated health services organization providing comprehensive care, innovative services, and cutting-edge technology to Western New York and beyond |
11,425 |
| 3 |
University of Rochester Medicineurmc.rochester.edu
Academic medical center providing advanced patient care, conducting disease research, and educating future healthcare professionals including doctors, dentists, and nurses. |
8,483 |
| 4 |
Mayo Clinic Health Systemmayoclinichealthsystem.org
Community-based health care provider offering highest-quality physical and virtual care through clinics, hospitals, and facilities in Iowa, Minnesota, and Wisconsin |
4,413 |
| 5 |
Highland Hospital of Rochester NYurmc.rochester.edu
A leading hospital with a rich history of personalized care and innovation in specialties like bariatric surgery, joint replacement, and oncology |
1,157 |
| 6 |
Olmsted Medical Centerolmmed.org
A not-for-profit healthcare provider in southeastern Minnesota offering a wide range of medical services with a focus on convenience and quality care |
788 |
| 7 |
Oakland University William Beaumont School of Medicineoakland.edu
A top-tier medical school dedicated to educating future physicians, conducting cutting-edge research, and promoting health in the community |
753 |
| 8 |
Mayo Clinic Laboratoriesmayocliniclabs.com
A global reference laboratory offering a sophisticated test catalog, pathology services, and collaborations with Mayo Clinic to advance patient care |
728 |
| 9 |
St. Ann's Communitystannscommunity.com
A leading senior housing and health services provider offering a continuum of care for older adults with various programs and services |
595 |
| 10 |
Ascension Crittenton Hospitalascension.org
A nationally ranked hospital with a wide range of medical specialties, advanced technology, teaching facilities, and a focus on compassionate patient care |
569 |
| 11 |
DePauldepaul.org
A progressive not-for-profit organization offering quality services including assisted living, mental health support, addiction prevention, vocational programs, and affordable housing to individuals in need |
537 |
| 12 |
Lifetime Care Home Health Care and Hospicelifetimecare.org
Lifetime Care provides personalized home care services, hospice care, and advanced technologies like telemedicine to support thriving health care careers |
438 |
| 13 |
Frisbie Memorial Hospitalwwwprod104-frisbiehospital-sitecore-cloud.dpxmedcity.net
Dedicated to providing safe, effective, and patient-centered healthcare services to the community, while collaborating with other providers to enhance overall health |
425 |
| 14 |
HCR Home Carehcrhealth.com
A leader in home health care services across 25 counties in New York, providing quality patient care through employee-owned partnership and state-of-the-art technology |
392 |
| 15 |
Trillium Healthtrilliumhealth.org
Health center providing LGBTQ+ inclusive care, primary and specialty medical services, supportive programs, and employment opportunities with equal opportunities and non-discrimination policies |
320 |
| 16 |
Monroe Community Hospitalmonroehosp.org
One of the largest skilled nursing facilities in New York State providing quality long-term care to individuals of all ages with complex health conditions |
313 |
| 17 |
Mayo Medical LaboratoriesMayoMedicalLaboratories.com
Global reference laboratory within Mayo Clinic, offering consultation services, outreach support, and comprehensive laboratory services to over 4,000 hospitals worldwide |
295 |
| 18 |
St. John's Senior Servicesstjohnsliving.org
Innovative provider of senior services, including independent living, adult day services, rehabilitation, skilled nursing care, and hospice Embracing living in every stage of life |
183 |
| 19 |
University of Rochester School of Nursingson.rochester.edu
A pioneering force in nursing education, research, and clinical practice offering a variety of undergraduate, graduate, and post-graduate degree programs |
179 |
| 20 |
All-American Home Careall-americanhomecare.com
A full service home care agency in New York providing personalized assistance for seniors and individuals with disabilities to maintain independence in their own homes |
175 |
| 21 |
Friendly Senior Livingfriendlyseniorliving.org
A continuum of care for seniors, offering skilled nursing, independent living, assisted living, memory care, and short-term rehabilitative services with a focus on dignity and independence |
175 |
| 22 |
Anthony L. Jordan Health Corporationjordanhealth.org
A healthcare organization providing comprehensive medical and dental services to diverse communities in Rochester, with multiple locations and a commitment to quality care |
172 |
| 23 |
Mayo Clinic Platformmayoclinicplatform.org
Mayo Clinic Platform harnesses new technologies to provide personalized, predictive, and innovative healthcare solutions for patients everywhere through collaboration with various stakeholders |
152 |
| 24 |
Episcopal SeniorLife Communitiesepiscopalseniorlife.org
A company founded on Christian values providing care and compassion for the community for over 150 years through various programs |
150 |
| 25 |
WorkFit Medical, LLCworkfitmedical.com
Provider of Occupational Medicine and Urgent Care services in New York State, focusing on occupational health services, drug testing, injury management, and physical therapy |
76 |
| 26 |
J&L Dental, A Johnson & Lund Co., Inc. Companyjldental.com
A trusted full service dental supplier providing materials, equipment, IT services, office design, and superior customer support for over 160 years |
12 |
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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 24, 2026.
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