Hola,
I'm Guillermo.

I am a Specialist in Psychiatry and Psychotherapy at Immanuel Klinik Rüdersdorf (University Hospital of MHB), where I am clinically responsible for the Section for Addiction Disorders, and a research associate at Brandenburg Medical School (MHB).

My work brings together clinical psychiatry, philosophy of psychiatry, and health services research. I draw on phenomenology — in particular the philosophies of Ortega y Gasset and Husserl — to illuminate questions in psychopathology, from the structure of delusional experience to the foundations of psychiatric knowledge. A second strand of my research examines the attitudes of mental health professionals towards transformative practices such as peer support work and the deprescribing of psychotropic medication.

Phenomenological Psychiatry Peer Support Work Antipsychotic Discontinuation Philosophy of Psychopathology Health Services Research
Publications → Get in touch ORCID ↗
Dr. Guillermo Ruiz Perez

Research

Phenomenological Psychopathology

Applying the philosophy of Ortega y Gasset and Blankenburg to the understanding of delusion and schizophrenia. Bridging continental philosophy and contemporary psychiatry.

Peer Support Work in Psychiatry

Implementation research, attitude studies, and institutional change processes through the introduction of peer support workers in psychiatric settings.

Antipsychotic Discontinuation

Qualitative and quantitative research on the attitudes of psychiatrists and patients towards antipsychotic reduction and discontinuation in outpatient settings.

Burden of Treatment

Developing burden of treatment as a philosophical and ethical concept: the totality of demands that medical care places on patients — from polypharmacy and side effects to restrictions on autonomy and biographical self-determination. A critical lens on overtreatment, deprescribing, and the normative foundations of clinical practice.

Talks & Conferences

Upcoming

→
Ruiz-Pérez G
The Self in the Social World
25 September 2026

Past presentations

2026
1
Ruiz-Pérez G, López-Silva P
Rethinking Belief in Schizophrenic Delusion: Bridging Phenomenological and Doxastic Approaches
Too Mad To Be True IV · 2026
2025
2
Ruiz-Pérez G
Psychiatrists' attitudes regarding the discontinuation of antipsychotics: TaNEA and TaPsyKo studies
World Psychiatry Congress · Prague, October 2025
2024
3
Ruiz-Pérez G
Ortega y Gasset's concept of Belief for the Phenomenology of Delusions
Too Mad To Be True III · Ghent, October 2024
4
Ruiz-Pérez G
Deprescripción de antipsicóticos
Interpsiquis XXV · 2024
2022
5
Fehler GV, Kramer U, Ruiz-Pérez G
ImpPeer-Psy5: Implementierung von Peer-Begleitung in der psychiatrischen Versorgung
3. Brandenburger Kongress für Versorgungsforschung · 2022
6
Ruiz-Pérez G
Creencia y evidencia natural: de Valenciano a Blankenburg
Interpsiquis XXII · 2022
2018
7
Domínguez-Roldán JM, García Alfaro C, Charris Castro L, Villar Gallardo J, Ruiz-Pérez G
Evaluación de la futilidad en casos de limitación de esfuerzo terapéutico (LET) en una unidad de cuidados intensivos neurológicos
Congreso Internacional de Bioética · Sevilla, 2018
8
Domínguez-Roldán JM, Ruiz-Pérez G
Análisis bioético de casos de potenciales donantes vivos de riñón en un hospital universitario de tercer nivel
Congreso Internacional de Bioética · Sevilla, 2018
2017
9
Domínguez-Roldán JM, Ruiz-Pérez G, García-González JM
Evaluación por un Comité de Bioética de 136 casos de donantes vivos de riñón
IV Congreso Nacional de Deontología · Málaga, 2017

Research Projects

A Phenomenological Grounding of Psychopathology in Ortega y Gasset's Philosophy
Ongoing
Independent research developing a phenomenological framework for psychopathology grounded in Ortega y Gasset's philosophy, in dialogue with Valenciano and Blankenburg.
MHL_251
2025–2026 · Robert Koch Institut
Co-coordinator and co-applicant — Scoping review on mental health literacy and its influence on mental health outcomes
TaPsyKo
2024–2026 · Land Brandenburg
PI – Quantitative attitude research on discontinuation processes in psychiatry
TaNEA
2023–2024 · Land Brandenburg / MHB
PI – Qualitative attitude research on discontinuation processes in psychiatry
PARTANE
2023–2024 · BMBF
Co-applicant and research associate — Preparation of a participatory systematic review on the discontinuation of neuroleptics
ImpPeer-Psy5
2020–2023 · G-BA
Research associate – Implementation of peer support work in psychiatric care

Publications

18
Articles
4
h-Index (Google Scholar)
3
Book Chapters
8
Conference Papers

A. Peer-reviewed journal articles

2026
1
Ruiz-Perez G
Disease model as attitude: a doxastic framework and the challenges of peer support work in mental health
Social Theory & Health · 10.1057/s41285-026-00258-9First authorQ2 SJR
2025
2
Ruiz Perez G, Ulrich N, Bettin J, Lippert J, Koch T, von Peter S
Reduktion und Absetzen von Antipsychotika in der ambulanten Praxis: Perspektiven von Psychiater*innen
Der Nervenarzt · Springer, 2025 · 10.1007/s00115-025-01922-7First authorQ3 SJR
3
Ruiz Perez G, Kramer U, Lippert J, Ulrich N, von Peter S
Dialogical Meanderings – Evaluation Framework and Learnings from Stakeholder Involvement in the Co-Design of a Participatory Systematic Review
Research Involvement and Engagement · Springer, 2025 · 10.1186/s40900-025-00809-wFirst authorQ1 JCR
4
Ruiz-Perez G, Kusel M, von Peter S
Changes in attitudes of mental health care staff surrounding the implementation of peer support work: A qualitative study
PLOS ONE · 2025 · 10.1371/journal.pone.0319830First authorQ1 SJR
5
Ruiz Perez G, von Peter S
Attitudes of Peer Support Workers towards the Medical Model: A Qualitative Study
Community Mental Health Journal · Springer, 2025 · 10.1007/s10597-025-01454-zFirst authorQ1 SJR
6
Ruiz Perez G
Saving the phenomena: a place for Ortega y Gasset's philosophy in psychopathology
Investigaciones Fenomenológicas · 2025 · 10.5944/rif.22.2025.45367First author
7
Koch T, von Peter S, Weinmann S, Ruiz-Perez G
Self-reported attitudes and strategies of physicians towards medication reduction and discontinuation
Psychiatry Research · Elsevier, 2025 · 10.1016/j.psychres.2025.116685Last authorQ1 SJR
8
Ziegenhagen J, Kramer U, Fehler GV, Ruiz-Perez G, Schmidt D, Cubellis L, Kusel M, von Peter S
Difference and subordination – the epistemic struggles of collaborative knowledge production in the field of mental health
Research Involvement and Engagement · Springer, 2025 · 10.1186/s40900-025-00720-4Q1 SJR
9
Ruiz-Pérez G
Una Fenomenología de La Esquizofrenia Desde Ortega. Luis Valenciano Gayá y Wolfgang Blankenburg
Revista de Estudios Orteguianos · Nr. 51, 2025 · 10.63487/reo.259First author
2024
10
Ruiz Perez G, Kusel M, von Peter S
Berufsbild und Finanzierung der Peer- und Genesungsbegleitung in Deutschland – Status Quo und Möglichkeiten
Das Gesundheitswesen · Thieme, 2024 · 10.1055/a-2452-4239First authorQ3 SJR
11
Ruiz-Perez G
El síndrome paranoide: la fenomenología de la esquizofrenia de Valenciano a Blankenburg
Revista Colombiana de Psiquiatría · Elsevier, 2024 · 10.1016/j.rcp.2024.03.007First author
12
Ruiz-Perez G
¿Un nuevo Perspectivismo? Delirio y verdad desde el punto de vista del Nuevo Realismo
Revista de la Asociación Española de Neuropsiquiatría · 2024 · DOI ↗First author
13
Schmidt D, Heuer I, Kusel M, Ruiz Perez G, von Peter S
Übersehene Professionalität – individuelle Gelingensfaktoren von Peer-Begleitung
Der Nervenarzt · 2024 · 10.1007/s00115-024-01754-xQ3 SJR
14
von Peter S, Kusel M, Ziegenhagen J, Ruiz-Perez G et al.
Change Agents oder Peer Washing: Peer-Begleitung und Veränderung psychiatrischer Einrichtungen
Psychiatrische Praxis · 2024 · 10.1055/a-2361-4057Q3 SJR
2023
15
Ruiz-Perez G
Delirio como creencia
Culturas Científicas · 2023 · 10.35588/cc.v3i2.5685First author
16
von Peter S, Kramer UM, Cubelis L, Ruiz-Perez G et al.
Implementing peer support work in mental health care in Germany: The methodological framework of the ImpPeer-Psy5 study
Health Expectations · Wiley, 2023 · 10.1111/hex.13938Q1 JCR
2020
17
Schwarz J, Duve A, Heiser P, Hoffmann S, Ruiz-Perez G, Heinze M, von Peter S
Erfahrungen der Stakeholder mit den Modellvorhaben nach §64b SGB V in der Kinder- und Jugendpsychiatrie
Zeitschrift für Kinder- und Jugendpsychiatrie · 2020 · 10.1024/1422-4917/a000716Q3 SJR
18
Ruiz-Perez G
Der Abbruch des weiblichen Diskurses in der Fibromyalgie
Internationale Zeitschrift für Philosophie und Psychosomatik · 2020First author

B. Book chapters

1
Ruiz-Pérez G
El modelo biomédico en Psiquiatría. El papel del apoyo entre iguales
In: Humanidad en vilo · Dykinson, 2026 · ISBN 9788410704688
2
García-Haro J, Morales A, Ruiz-Pérez G, Al-Halabi S
Modelo fenomenológico y existencial
In: Enfoques en Psicopatología I · Pirámide, 2026 · ISBN 9788436851410
3
Ruiz-Pérez G
Anhelar la espera: sobre la desesperación y la fe desde la psiquiatría fenomenológica
In: Un futuro sin Cristo? · PPC, 2023 · ISBN 978-84-288-3992-1

CV

Professional Experience
present
Specialist in Psychiatry and Psychotherapy
Immanuel Klinik Rüdersdorf — University Hospital of MHB
present
Research Associate
Brandenburg Medical School (MHB)
Research projects
04/2024–08/2025
Neurology Rotation (17 months)
Median Klinik Grünheide, Brandenburg
03/2020–03/2026
Resident Physician / Specialist Training in Psychiatry
Immanuel Klinik Rüdersdorf
Board certification: 04.03.2026
05/2019–02/2020
Start of Specialist Training in Psychiatry
Katholisches Klinikum Essen
Education
2023–2026
Dr. med. – Dissertation defence: 9 June 2026
Brandenburg Medical School (MHB)
Supervisor: Prof. Dr. Sebastian von Peter · Grade: magna cum laude
Personnel and institutional changes in psychiatry through the implementation of peer support workers
2021–2025
Dr. phil. – Sobresaliente cum laude (highest distinction)
UNED Madrid
Supervisor: Prof. Dr. Tomas Domingo Moratalla
Una fenomenología de la esquizofrenia desde Ortega. Luis Valenciano y Wolfgang Blankenburg
2013–2021
B.A. Philosophy
Universidad Nacional de Educación a Distancia (UNED), Madrid
2012–2018
B.A. Medicine (State Examination)
Universidad de Sevilla
Memberships & Committees
Since 2024
Committee for Psychopharmacology
German Association for Social Psychiatry (DGSP)
Since 2020
Working Group Mental Health · Working Group Paradigms, Attitudes and Relationships · Working Group De-escalation
Brandenburg Medical School (MHB)
2017–2018
Ethics Committee
Universitätsklinikum „Virgen del Rocío", Sevilla
Chair: Prof. Dr. J-M. Domínguez Roldán

Contact

Let's get in touch.

I welcome enquiries about collaborations, invited talks, and joint research projects — especially at the intersection of psychiatry, philosophy, and participatory research.

Email guillermo.perez@mhb-fontane.de
ORCID 0000-0003-3753-0796
Institution Brandenburg Medical School (MHB)
Hospital Immanuel Klinik Rüdersdorf