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CNAE 8640-2/08 · Brazil

Serviços de diagnóstico por registro gráfico - ecg, eeg e outros exames análogos

1,031 active companies in the Brazilian CNPJ registry have this CNAE as their main activity. Look up companies and explore their distribution by state and city.

Source: Receita Federal, CNPJ Open Data · October 2026 publication

What this list shows

We count each active company in the Brazilian CNPJ registry once, by its head office 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.

Active companies
1,031
734th of 1,329 activities
Opened in 12 months
85
+9.0% · 727th by openings
Of every 100 companies in the country
0.0
do this activity
Openings per 100 active
8
in the country: 21

Active companies in this activity

More active establishments and higher registered capital first. This order is not a quality assessment or recommendation.

Look up companies in this activity (up to 300)

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.

Where the companies are

Acre: 1 company, 0.0 of every 100 active companies there Alagoas: 27 companies, 0.0 of every 100 active companies there Amapá: 0 companies, 0.0 of every 100 active companies there Amazonas: 14 companies, 0.0 of every 100 active companies there Bahia: 55 companies, 0.0 of every 100 active companies there Ceará: 30 companies, 0.0 of every 100 active companies there Distrito Federal: 19 companies, 0.0 of every 100 active companies there Espírito Santo: 20 companies, 0.0 of every 100 active companies there Goiás: 73 companies, 0.0 of every 100 active companies there Maranhão: 16 companies, 0.0 of every 100 active companies there Mato Grosso: 13 companies, 0.0 of every 100 active companies there Mato Grosso do Sul: 6 companies, 0.0 of every 100 active companies there Minas Gerais: 132 companies, 0.0 of every 100 active companies there Pará: 32 companies, 0.0 of every 100 active companies there Paraíba: 13 companies, 0.0 of every 100 active companies there Paraná: 52 companies, 0.0 of every 100 active companies there Pernambuco: 30 companies, 0.0 of every 100 active companies there Piauí: 5 companies, 0.0 of every 100 active companies there Rio de Janeiro: 132 companies, 0.0 of every 100 active companies there Rio Grande do Norte: 4 companies, 0.0 of every 100 active companies there Rio Grande do Sul: 76 companies, 0.0 of every 100 active companies there Rondônia: 7 companies, 0.0 of every 100 active companies there Roraima: 0 companies, 0.0 of every 100 active companies there Santa Catarina: 24 companies, 0.0 of every 100 active companies there São Paulo: 228 companies, 0.0 of every 100 active companies there Sergipe: 11 companies, 0.0 of every 100 active companies there Tocantins: 11 companies, 0.0 of every 100 active companies there

Weight in each federative unit: of every 100 active companies, how many have this main activity

  1. 0.0
  2. 0.0
  3. 0.0
  4. 0.0
  5. 0.0

Federative units with the most companies

  1. 1 São Paulo 228
  2. 2 Minas Gerais 132
  3. 3 Rio de Janeiro 132
  4. 4 Rio Grande do Sul 76
  5. 5 Goiás 73
  6. 6 Bahia 55
  7. 7 Paraná 52
  8. 8 Pará 32
  9. 9 Ceará 30
  10. 10 Pernambuco 30
See the 25 federative units
  1. 11 Alagoas 27
  2. 12 Santa Catarina 24
  3. 13 Espírito Santo 20
  4. 14 Distrito Federal 19
  5. 15 Maranhão 16
  6. 16 Amazonas 14
  7. 17 Mato Grosso 13
  8. 18 Paraíba 13
  9. 19 Sergipe 11
  10. 20 Tocantins 11
  11. 21 Rondônia 7
  12. 22 Mato Grosso do Sul 6
  13. 23 Piauí 5
  14. 24 Rio Grande do Norte 4
  15. 25 Acre 1

Cities with the most companies

active companies by head office

  1. 1 São Paulo (SP) 103
  2. 2 Rio de Janeiro (RJ) 67
  3. 3 Goiânia (GO) 43
  4. 4 Belo Horizonte (MG) 34
  5. 5 Fortaleza (CE) 23
  6. 6 Curitiba (PR) 20
  7. 7 Brasília (DF) 19
  8. 8 Salvador (BA) 18
  9. 9 Porto Alegre (RS) 18
  10. 10 Recife (PE) 17
See the 30 cities
  1. 11 Campinas (SP) 15
  2. 12 Maceió (AL) 14
  3. 13 Belém (PA) 13
  4. 14 Manaus (AM) 11
  5. 15 João Pessoa (PB) 10
  6. 16 Aracaju (SE) 10
  7. 17 Divinópolis (MG) 10
  8. 18 Uberlândia (MG) 8
  9. 19 Caxias do Sul (RS) 8
  10. 20 Passo Fundo (RS) 8
  11. 21 Arapiraca (AL) 7
  12. 22 Feira de Santana (BA) 7
  13. 23 Macaé (RJ) 7
  14. 24 Niterói (RJ) 7
  15. 25 Cuiabá (MT) 7
  16. 26 Campos dos Goytacazes (RJ) 6
  17. 27 Limeira (SP) 6
  18. 28 Palmas (TO) 6
  19. 29 Itabuna (BA) 5
  20. 30 Contagem (MG) 5

What activity 8640-2/08 is

  1. Section Q — Saúde humana e serviços sociais
  2. Division — Atividades de atenção à saúde humana
  3. Group — Atividades de serviços de complementação diagnóstica e terapêutica
  4. Class — Atividades de serviços de complementação diagnóstica e terapêutica

What it covers

  • Os serviços de diagnóstico por registro gráfico - ECG, EEG, polissonografia, audiometria e outros tipos de serviços de diagnóstico por registro gráfico

What it does not cover

Typical activities

  • Audiometria
  • Polissonografia
  • Serviços de diagnóstico por registro gráfico
  • Serviços de eletrocardiograma - ecg
  • Serviços de eletroencefalografia
  • Serviços de eletroencefalograma - eeg

Source: IBGE, CNAE 2.3 and its explanatory notes

The activities of class 8640-2

atividades de serviços de complementação diagnóstica e terapêutica, by subclass
SubclassActiveOpeningsChange
8640-2/01 Laboratórios de anatomia patológica e citológica1,59383+6.4%
8640-2/02 Laboratórios clínicos13,924940+12.0%
8640-2/03 Serviços de diálise e nefrologia1,08651−17.7%
8640-2/04 Serviços de tomografia1,802153+22.4%
8640-2/05 Serviços de diagnóstico por imagem com uso de radiação ionizante, exceto tomografia9,757829−1.4%
8640-2/06 Serviços de ressonância magnética841121+72.9%
8640-2/07 Serviços de diagnóstico por imagem sem uso de radiação ionizante, exceto ressonância magnética4,832380+1.9%
8640-2/08 Serviços de diagnóstico por registro gráfico - ecg, eeg e outros exames análogos · this one1,03185+9.0%
8640-2/09 Serviços de diagnóstico por métodos ópticos - endoscopia e outros exames análogos1,27484+35.5%
8640-2/10 Serviços de quimioterapia41024—
8640-2/11 Serviços de radioterapia43052+30.0%
8640-2/12 Serviços de hemoterapia20820—
8640-2/13 Serviços de litotripcia372—
8640-2/14 Serviços de bancos de células e tecidos humanos497—
8640-2/99 Atividades de serviços de complementação diagnóstica e terapêutica não especificadas anteriormente3,328200−11.1%

Frequently asked questions about CNAE 8640-2/08

How many CNAE 8640-2/08 companies are there in Brazil?

1,031 active companies have CNAE 8640-2/08 as their main activity, according to the Receita Federal's October 2026 publication. It is 734th among the country's activities by companies.

Which activities make up class 8640-2?

Class 8640-2 has 15 subclasses: 8640-2/01; 8640-2/02; 8640-2/03; 8640-2/04; 8640-2/05; 8640-2/06; 8640-2/07; 8640-2/08; 8640-2/09; 8640-2/10; 8640-2/11; 8640-2/12; 8640-2/13; 8640-2/14; 8640-2/99. The official names are in the subclass table. A company declares one main activity and may declare others as secondary activities.

Which federative unit has the most companies in this activity?

São Paulo, with 228. There, 0.0 of every 100 active companies have this main activity, against 0.0 in the national registry.

Does this total include branches and secondary activities?

No. Each active company is counted once, by its head office and registered main activity. A company may carry out this activity as a secondary activity and be excluded from the count. Geographic distribution uses the registered location; records without a recognized federative unit may be counted nationally without appearing in local groups.

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 in the Brazilian CNPJ registry with this as their main activity, counted once by head office. Location is taken from the registry. Where available, openings are for the last 12 months, compared with the previous 12 months.

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