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CNAE 8640-2/04 · Brazil

Serviços de tomografia

1,802 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
1,802
621st of 1,329 activities
Opened in 12 months
153
+22.4% · 630th 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: 3 companies, 0.0 of every 100 active companies there Alagoas: 30 companies, 0.0 of every 100 active companies there Amapá: 1 company, 0.0 of every 100 active companies there Amazonas: 5 companies, 0.0 of every 100 active companies there Bahia: 83 companies, 0.0 of every 100 active companies there Ceará: 28 companies, 0.0 of every 100 active companies there Distrito Federal: 19 companies, 0.0 of every 100 active companies there Espírito Santo: 35 companies, 0.0 of every 100 active companies there Goiás: 52 companies, 0.0 of every 100 active companies there Maranhão: 45 companies, 0.0 of every 100 active companies there Mato Grosso: 42 companies, 0.0 of every 100 active companies there Mato Grosso do Sul: 17 companies, 0.0 of every 100 active companies there Minas Gerais: 167 companies, 0.0 of every 100 active companies there Pará: 35 companies, 0.0 of every 100 active companies there Paraíba: 23 companies, 0.0 of every 100 active companies there Paraná: 99 companies, 0.0 of every 100 active companies there Pernambuco: 55 companies, 0.0 of every 100 active companies there Piauí: 18 companies, 0.0 of every 100 active companies there Rio de Janeiro: 591 companies, 0.0 of every 100 active companies there Rio Grande do Norte: 19 companies, 0.0 of every 100 active companies there Rio Grande do Sul: 87 companies, 0.0 of every 100 active companies there Rondônia: 13 companies, 0.0 of every 100 active companies there Roraima: 0 companies, 0.0 of every 100 active companies there Santa Catarina: 51 companies, 0.0 of every 100 active companies there São Paulo: 270 companies, 0.0 of every 100 active companies there Sergipe: 7 companies, 0.0 of every 100 active companies there Tocantins: 7 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 Rio de Janeiro 591
  2. 2 São Paulo 270
  3. 3 Minas Gerais 167
  4. 4 Paraná 99
  5. 5 Rio Grande do Sul 87
  6. 6 Bahia 83
  7. 7 Pernambuco 55
  8. 8 Goiás 52
  9. 9 Santa Catarina 51
  10. 10 Maranhão 45
See the 26 federative units
  1. 11 Mato Grosso 42
  2. 12 Espírito Santo 35
  3. 13 Pará 35
  4. 14 Alagoas 30
  5. 15 Ceará 28
  6. 16 Paraíba 23
  7. 17 Distrito Federal 19
  8. 18 Rio Grande do Norte 19
  9. 19 Piauí 18
  10. 20 Mato Grosso do Sul 17
  11. 21 Rondônia 13
  12. 22 Sergipe 7
  13. 23 Tocantins 7
  14. 24 Amazonas 5
  15. 25 Acre 3
  16. 26 Amapá 1

Cities with the most companies

active companies by head office

  1. 1 Rio de Janeiro (RJ) 528
  2. 2 São Paulo (SP) 123
  3. 3 Recife (PE) 36
  4. 4 Salvador (BA) 36
  5. 5 Curitiba (PR) 31
  6. 6 São Luís (MA) 23
  7. 7 Maceió (AL) 20
  8. 8 Goiânia (GO) 20
  9. 9 Brasília (DF) 19
  10. 10 Belo Horizonte (MG) 18
See the 30 cities
  1. 11 Fortaleza (CE) 15
  2. 12 Porto Alegre (RS) 15
  3. 13 Natal (RN) 14
  4. 14 Vitória (ES) 14
  5. 15 Niterói (RJ) 14
  6. 16 Joinville (SC) 13
  7. 17 Belém (PA) 11
  8. 18 Floriano (PI) 10
  9. 19 João Pessoa (PB) 10
  10. 20 Caxias do Sul (RS) 10
  11. 21 Ribeirão Preto (SP) 9
  12. 22 Imperatriz (MA) 8
  13. 23 Sorocaba (SP) 8
  14. 24 Cuiabá (MT) 8
  15. 25 Arapiraca (AL) 7
  16. 26 São Caetano do Sul (SP) 7
  17. 27 Juiz de Fora (MG) 6
  18. 28 Poços de Caldas (MG) 6
  19. 29 São Gonçalo (RJ) 6
  20. 30 Maringá (PR) 6

What activity 8640-2/04 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 que realizam exames de tomografia

What it does not cover

Typical activities

  • Serviços de tomografia
  • Serviços de tomografia computadorizada

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 tomografia · this one1,802153+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 análogos1,03185+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 8640-2/04

How many CNAE 8640-2/04 companies are there in Brazil?

1,802 active companies have CNAE 8640-2/04 as their main activity, according to the Receita Federal's October 2026 publication. It is 621st 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?

Rio de Janeiro, with 591. 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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