Excellence in clinical research from A to Z

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About us

AtoZ-CRO GmbH is a full-service clinical research organisation (CRO) located in Overath near Cologne, Germany, with over 30 years of experience in clinical development and clinical study management. As a specialist for Germany, Europe, the US, and India, AtoZ-CRO offers a broad range of professional services and partner solutions for international clinical studies with pharmaceuticals and medical devices.

From its head office located in Overath, Germany, AtoZ-CRO manages and coordinates clinical studies of phase 0 through phase IV for national and international clients. The company forms a team of 35 highly experienced and dedicated industry professionals and medical specialists ensuring high standards in clinical study management. AtoZ-CRO is affiliated with a leading initiator of phase I studies in Warsaw, Poland.

Based on the company’s long-established international experience in clinical trial management and cooperation with high-rated business partners, AtoZ-CRO is proud to offer a broad range of services covering all clinical research needs, in particular for small and mid-sized pharmaceutical, biotech, and medical device companies.

Clinical Studies 

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Clinical Studies

Clinical Studies Phases 0 – IV

  • Planning of clinical studies
  • Preparation of study protocols
  • Design and implementation of CRFs (case report forms) and eCRFs
  • Processing of applications for ethical votes and permissions (e.g. CTA, IND)
  • Regulatory affairs issues
  • Legal EU representative

Other services

  • Monitoring
  • Post-marketing studies

-  NIS


-  Epidemiology

  • Pharmacovigilance
  • Biometry
  • Medical Writing and Translations

About us

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Contact us


Hauptstr. 77
51491 Overath
Tel: 02206 95 99 0
Fax: 02206 820 63
Email: info@atoz-cro.de

Business Development

Dr. med. Karl-Peter Klein | Managing Director
Email: kp.klein@atoz-cro.de

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