CNAE 8640-2/08 · Rio de Janeiro
Diagnostic services by graphic recording - ECG, EEG and similar tests in Rio de Janeiro
132 active companies are headquartered in Rio de Janeiro with this CNAE as their main activity. They represent 12.8% of Brazil's active companies with the same main activity.
Source: Receita Federal, CNPJ Open Data · October 2026 publication
The same activity in Brazil 1,031
What this list shows
We count each active company once, by its head office in this state and this CNAE as its main activity. Branches and secondary activities are excluded from this scope. The total describes the registry, not market revenue or company quality.
- Companies in Rio de Janeiro
- 132
- 12.8% of Brazil's
- Of every 100 companies in Rio de Janeiro
- 0.0
- do this activity
- Among Brazil's federative units
- 3rd
- by companies in this activity
Active companies in Rio de Janeiro
More active establishments and higher registered capital first. This order is not a quality assessment or recommendation. · page 4 of 5- LID SERVICOS MEDICOS LTDARio de Janeiro (RJ)
- PATRICIA MONTRESOR SERVICOS VETERINARIOS LTDARio de Janeiro (RJ)
- TEC MED SERVICOS MEDICOS TECNICOS LTDARio de Janeiro (RJ)
- LAUDEI SERVICOS DE TELEMEDICINA LTDAMacaé (RJ)
- CLINICA SPIKE PRESTACAO DE SERVICOS MEDICOS LTDARio de Janeiro (RJ)
- CLINICA LIMIAR ATENDIMENTO AUDITIVO E DIAGNOSTICOS LTDAMaricá (RJ)
- MRG SERVICOS MEDICOS LTDANiterói (RJ)
- CP CEREBRAIS EXAMES DE ELETROENCEFALOGRAMA E EEG COM MAPEAMENTO LTDARio de Janeiro (RJ)
- VENTURI SERVICOS MEDICOS LTDARio de Janeiro (RJ)
- CLINICA STZ PRESTACAO DE SERVICOS MEDICOS LTDADuque de Caxias (RJ)
- MRJ SERVICOS MEDICOS LTDA.Rio de Janeiro (RJ)
- CLINICA NEUROLOGICA RIO DE JANEIRO LTDARio de Janeiro (RJ)
- SERVICOS DE ELETRENCEFALOGRAFIA DE PETROPOLIS LTDAPetrópolis (RJ)
- CLINICA CERECOL LTDARio de Janeiro (RJ)
- LGC MED SERVICOS MEDICOS LTDARio de Janeiro (RJ)
- BR RADIOLOGIA LTDARio de Janeiro (RJ)
- BR RADIOLOGIA LTDA SCPRio de Janeiro (RJ)
- PROMEDCOR LTDAItaperuna (RJ)
- CONSULCLIN CENTER LTDARio de Janeiro (RJ)
- DIAGNOSCOR SERVICOS MEDICOS LTDARio de Janeiro (RJ)
- NEURO MAX CLINICA DE DIAGNOSTICO NEUROLOGICO LTDA.Nova Friburgo (RJ)
- L3 CARDIOLOGIA LTDANiterói (RJ)
- COR & ACAO SERVICOS MEDICOSRio de Janeiro (RJ)
- CEAP DIAGNOSTICOS POR IMAGEM LTDARio de Janeiro (RJ)
- DUARTE VARJAO SERVICOS MEDICOS LTDA.Rio de Janeiro (RJ)
- NEURONAL MEDICINA ESPECIALIZADA LTDARio de Janeiro (RJ)
- SCAN CORDIS SERVICOS MEDICOS LTDA.Rio de Janeiro (RJ)
- MAGALHAES & FIRME MEDICOS ASSOCIADOS LTDAPetrópolis (RJ)
- CICARPE CENTRO DE INVESTIGACOES CARDIOLOGICAS DE PETROPOLIS LTDAPetrópolis (RJ)
- G. S. CASTRO JUNIOR SERVICOS MEDICOS LTDANiterói (RJ)
List limited to 132 companies, 30 per page. Looking for a specific company? Search by name or CNPJ.
How to assess a company's data
When you open a company's record, use these guides to check the data and understand what each field can establish.
- How to look up a CNPJ
Check identifiers, dates and registry fields against official sources.
- What an active CNPJ means
Active status does not show that a company is debt-free, licensed or able to operate.
- How to read partner and administrator records
Understand QSA roles and the limits on ownership and representation information.
How much the activity weighs
of every 100 active companies, how many do this activity
- Rio de Janeiro0.0
- Brazil0.0
In Rio de Janeiro, the activity weighs 1.6 times what it does in Brazil.
Rio de Janeiro's cities with the most companies in this activity
active companies and each city's share of the state
- 1 Rio de Janeiro 50.8% 67
- 2 Macaé 5.3% 7
- 3 Niterói 5.3% 7
- 4 Campos dos Goytacazes 4.5% 6
- 5 Itaperuna 3.0% 4
- 6 Petrópolis 3.0% 4
- 7 Resende 3.0% 4
- 8 Duque de Caxias 2.3% 3
- 9 Nova Friburgo 2.3% 3
- 10 Nova Iguaçu 2.3% 3
16 more cities
- 11 São Gonçalo 3
- 12 Cabo Frio 2
- 13 Cordeiro 2
- 14 Maricá 2
- 15 Teresópolis 2
- 16 Três Rios 2
- 17 Valença 2
- 18 Mesquita 1
- 19 Belford Roxo 1
- 20 Angra dos Reis 1
- 21 Itaguaí 1
- 22 Natividade 1
- 23 São João da Barra 1
- 24 São João de Meriti 1
- 25 São Pedro da Aldeia 1
- 26 Volta Redonda 1
Class 8640-2 in Rio de Janeiro
atividades de serviços de complementação diagnóstica e terapêutica, by subclass| Subclass | Active |
|---|---|
| 8640-2/01 Pathological anatomy and cytology laboratories | 129 |
| 8640-2/02 Clinical laboratories | 1,189 |
| 8640-2/03 Dialysis and nephrology services | 104 |
| 8640-2/04 Computed tomography services | 591 |
| 8640-2/05 Diagnostic imaging with ionizing radiation, except tomography | 1,023 |
| 8640-2/06 Magnetic resonance imaging services | 56 |
| 8640-2/07 Diagnostic imaging without ionizing radiation, except MRI | 447 |
| 8640-2/08 Diagnostic services by graphic recording - ECG, EEG and similar tests · this one | 132 |
| 8640-2/09 Diagnostic services by optical methods - endoscopy and similar tests | 97 |
| 8640-2/10 Chemotherapy services | 32 |
| 8640-2/11 Radiotherapy services | 40 |
| 8640-2/12 Hemotherapy services | 22 |
| 8640-2/13 Lithotripsy services | 0 |
| 8640-2/14 Human cell and tissue bank services | 2 |
| 8640-2/99 Diagnostic and therapeutic support services not elsewhere classified | 394 |
Close to this: 8640-2/99 · Diagnostic and therapeutic support services not elsewhere classified, 394 companies in Rio de Janeiro.
What activity 8640-2/08 is
- Os serviços de diagnóstico por registro gráfico - ECG, EEG, polissonografia, audiometria e outros tipos de serviços de diagnóstico por registro gráfico
Frequently asked questions
How many companies have main CNAE 8640-2/08 in Rio de Janeiro?
132 active companies have CNAE 8640-2/08 as their main activity in Rio de Janeiro, according to the Receita Federal's October 2026 publication. That is 0.0 of every 100 companies there, against 0.0 in Brazil.
Which of Rio de Janeiro's cities has the most companies in this activity?
Rio de Janeiro, with 67, 50.8% of the state's companies in this activity.
Why can this total differ from the companies operating in this state?
This scope counts active companies by their head office and registered main activity. A company may operate in this state through a branch or carry out the activity as a secondary activity and be excluded from the count. The registered address and CNAE do not establish every operating location or service.
Does active status mean a company is qualified for a contract?
No. Active status describes the Receita Federal registration. It does not establish tax compliance, creditworthiness, licences, ability to fulfil a contract or quality. Check the relevant official documents and the contract's requirements.
How we count
Active companies with this as their main activity, counted by head office in Rio de Janeiro.