| # | Company | Employees |
|---|---|---|
| 1 |
Rede D'Orrededorsaoluiz.com.br
The largest integrated healthcare network in Brazil, with hospitals, oncology clinics, blood banks, and research institutes across multiple states Follow on social media for updates |
42,515 |
| 2 |
Unimed-Riounimedrio.com.br
Healthcare organization in Brazil with over 1 million customers, leading the market in Rio de Janeiro Committed to social responsibility and employee development |
3,901 |
| 3 |
DaVita Tratamento Renaldavita.com.br
A global leader in providing renal care through innovative practices, improving health, quality of life, and access to treatment for patients worldwide |
3,823 |
| 4 |
Hospital São Vicente de Paulohsvp.org.br
A healthcare provider that achieved accreditation from JCI multiple times, confirming the quality and safety of its services |
2,499 |
| 5 |
Rede Hospital Casaredehospitalcasa.com.br
Leading independent medical hospital operator in Rio de Janeiro, providing a wide range of specialties, 11 emergency rooms, 44 surgery rooms, and a focus on humanized patient care |
2,210 |
| 6 |
Assim Saúdeassim.com.br
A healthcare operator in Rio de Janeiro with a vast network of hospitals and clinics, offering quality medical services with modern technology and skilled professionals |
2,149 |
| 7 |
Hospital São Lucas Copacabanasaolucascopacabana.com.br
A longstanding hospital in Rio de Janeiro with a renowned Emergency Department, state-of-the-art surgical center, robotic technology, and a large team providing thousands of surgeries and medical services annually |
2,004 |
| 8 |
Casa de Saúde São Joséredesantacatarina.org.br
A healthcare institution established by dedicated sisters in 1923, providing medical care across various departments with accreditations from ONA III and Canadian organizations |
1,824 |
| 9 |
Grupo GSHgrupogsh.com.br
Specialized network in high-complexity hemotherapy and cellular therapy, with a focus on patient care, quality, and expertise in transfusional medicine nationwide |
1,046 |
| 10 |
Oncologia D'Orrededorsaoluiz.com.br
Specializing in oncology, we offer superior cancer diagnosis and treatment across Brazil with a network of over 40 units and 360+ oncologists |
1,004 |
| 11 |
Instituto Nacional de Traumatologia e Ortopediainto.saude.gov.br
Specializing in treating complex orthopedic diseases and traumas, the organization excels in surgical procedures and research, with a focus on quality and innovation |
891 |
| 12 |
Bioxxi - Excelência em Esterilizaçãobioxxi.com.br
Leader in sterilization services & solutions for healthcare industry since 1981 Accredited by IQG & certified by international standards, offering various sterilization methods & quality assurance |
871 |
| 13 |
Golden Crossgoldencross.com.br
A reputable player in the health insurance sector in Brazil, serving around 500k corporate clients with a focus on customer satisfaction and transparency |
739 |
| 14 |
Hospital Municipal Ronaldo Gazolla
This medical center is a key part of the city's healthcare system, with a large outpatient clinic, numerous specialties, and a vast number of hospital beds |
706 |
| 15 |
Hospital Copa Starrededorsaoluiz.com.br
A cutting-edge healthcare facility in the heart of Rio de Janeiro's Copacabana, providing excellence in medical assistance and hospital services nationwide |
609 |
| 16 |
HEMORIOhemorio.rj.gov.br
A blood center in Rio de Janeiro supplying blood and its products to around 180 healthcare facilities |
579 |
| 17 |
Grupo BR MEDgrupobrmed.com.br
Leading provider of comprehensive health services for businesses in Brazil, with a network of clinics serving over 350,000 employees through 15 million consultations and exams in 2022 |
543 |
| 18 |
Hospital São Francisco na Providência de Deushospitalsaofranciscorj.com.br
Specialized team and cutting-edge technology providing integrated healthcare services including emergency care, outpatient services, diagnostics, inpatient care, and surgery |
536 |
| 19 |
Rede Adventista Silvestre de Saúderedesilvestre.com
Established in 1942, specializes in providing innovative solutions/services/products to meet the needs of various industries/customers worldwide |
534 |
| 20 |
Grupo Prontobabyprontobaby.com.br
Specializing in pediatric care for patients aged 0-18, the group offers emergency, clinical, surgical, ICU, oncology, and cardiac services, as well as homecare and outpatient options |
531 |
| 21 |
Instituto Estadual do Cérebro Paulo Niemeyer
The state Brain Complex consists of a high-complexity neurology hospital and a low-medium complexity clinical unit, both providing healthcare services exclusively for public health system patients They prioritize sustainability practices and community education |
483 |
| 22 |
Hospital Badim | Oficialblog.hospitalbadim.com.br
Specializing in adult emergency care, cardiology, orthopedics, diagnostic imaging, intensive care, surgical procedures, and bariatric surgery |
468 |
| 23 |
Pronep Life Carepronep.com.br
Specialists in home healthcare, offering a range of services from specialized home nursing to palliative care, focusing on quality of life and individualized patient care |
442 |
| 24 |
Fresenius Medical Care Brfreseniusmedicalcare.com.br
Global provider of products and services for chronic kidney disease patients, operating dialysis clinics worldwide and leading in innovation and quality standards |
426 |
| 25 |
Hospital São Bernardohospitalsaobernardo.com.br
Hospital São Bernardo provides general healthcare services to adult patients, including medical and surgical care with 80 beds and specialized units |
416 |
| 26 |
Hospital Semiusemiu.com.br
Providing warm and secure healthcare assistance to ensure sustainable customer satisfaction |
408 |
| 27 |
Hospital São Matheushospitalsaomatheus.com.br
State-of-the-art facilities and excellent hospitality make this hospital a healthcare center offering emergency and elective care for patients of all ages |
388 |
| 28 |
ESHO
Hospital management company overseeing multiple large hospitals in Rio de Janeiro, São Paulo, and Brasilia |
385 |
| 29 |
Hospital Memorial Fuad Chididmemorialsaogoncalo.com.br
Leading outpatient health insurance operator founded in 1998, serving the Rio de Janeiro and Greater Rio area with a focus on memorial healthcare |
362 |
| 30 |
Hospital Placiplaci.com.br
Specialized hospital focused on transitioning patients post-hospitalization for rehabilitation and palliative care, providing quality of life and symptom control with interdisciplinary support |
343 |
| 31 |
Hospital Ilha do Governadorredehospitalcasa.com.br
A team of professionals offers comprehensive personalized assistance to elderly individuals by identifying their specific needs and providing appropriate care |
313 |
| 32 | 309 | |
| 33 |
Smart Hospital
Humanizing hospital care through technology to create excellent service Managing administrative operations for Souza Aguiar Hospital in Rio de Janeiro under a PPP |
187 |
| 34 |
Bioxxi Serviços de Esterilização Ltda.bioxxi.com.br
With almost 30 years of experience, the company specializes in providing solutions for reusing hospital materials in Brazil, with a focus on sterilization and reprocessing |
181 |
| 35 |
Clínica São Vicente: Pronto Atendimento 24h, Urgência e Emergência, Gávea, Rio de Janeiro RJrededorsaoluiz.com.br
A general hospital in Duque de Caxias, specialized in high complexity cases, with adult and pediatric emergency servicesLocated conveniently for easy access |
175 |
| 36 |
Hospital do Olhohospitaldoolhorj.com.br
A specialized ophthalmology center providing consultations, exams, surgeries, and advanced technology treatments, with a mission to fight blindness and promote patient well-being |
175 |
| 37 |
Policlínica Universitária Piquet Carneiro, Universidade do Estado do Rio de Janeiroppc.uerj.br
Specialized health unit within UERJ Health Complex, dedicated to education, research, and healthcare services |
174 |
| 38 |
Hospital Clínica Grajaúhcgrajau.com.br
The company offers a range of medical services, including mobile ICU, 24-hour adult emergency care, consultations, laboratory, hospitalization, and hemodialysis |
170 |
| 39 |
Medcentermedcentersauderio.com.br
Integrated health center offering medical consultation in various specialties, high-quality complementary exams, and accessible prices for private and insurance-covered visits in Rio de Janeiro |
164 |
| 40 |
Hospital Badimrededorsaoluiz.com.br
Specializing in adult emergency care, cardiology, orthopedics, imaging diagnostics, intensive care, surgical services, and bariatric surgery with ONA-3 certification for quality and patient care |
159 |
| 41 |
Grupo Quality Life Assistência Médicaqualitylifehc.com.br
Healthcare group offering personalized care at home, specializing in chronic patient management and high utilization management, with a focus on quality, ethics, and expansion |
158 |
| 42 |
Americas Oftalmocenteramericasoftalmocenter.com
Leading ophthalmology provider in Rio de Janeiro with 5 clinics, a 24-hour emergency care center, shared services, and surgical center Focus on personalized, humanized care |
158 |
| 43 |
Vitus
A healthcare group focused on musculoskeletal health, providing comprehensive treatment from childhood injuries to geriatric rheumatology, with a human-centered approach |
151 |
| 44 |
Centro Integrado De Reabilitaçãocirta.com.br
Specializing in treating musculoskeletal disorders, including post-stroke rehabilitation, among other conditions affecting millions of Brazilians |
146 |
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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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