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The Institut Mutualiste Montsouris (IMM) is a care-oriented, private, non-for-profit hospital. Located in Paris’s southern outskirts in the 14th district near Parc Montsouris, in an extremely dense and competitive hospital environment IMM performs primarily general and complex surgical operations, excelling in most areas, apart from neurosurgery and ENT.

IMM’s activities encompass treatment for a wide range of medical and surgical conditions, with teams of highly specialized physicians and surgeons dedicated to providing outstanding health services, education, and research

IMM’s expert staff members ensure optimal patient care through the use of advanced technology and innovative medical and surgical treatments. The experienced, compassionate team of doctors, nurses, and staff represent the best in medical excellence. To provide truly equal access to care, doctors at the IMM are salaried—in most cases full-time—and do not engage in private activity.

Since 2010, IMM’s overall capacity has increased significantly due to the resumption of the Department of Cardiac Pathology (Foch Hospital with six additional beds), the enlargement of the Pediatrics and Maternity Department (five extra beds), and the creation of the Oncology Department (10 inpatient hospital beds and 10 day hospital beds).

IMM’s capacity has therefore increased to 465 beds, 34 intensive care and 24-hour monitored care beds, 38 inpatient hospitalization beds, 17 surgery rooms, and 12 hemodialysis stations. In 2014, the IMM guaranteed 35,000 inpatient treatments, 160,000 consultations and 15,000 surgeries.

National and International certifications

IMM has received numerous awards for decades for excellence in patient care. As a top performer, IMM is ranked third among private hospital clinics in France (LePoint.fr), especially for quality in pediatric and maternity care, general medicine, urological surgery, gynecological surgery, oncology, cardio-thoracic surgery, and pneumology. The French National Authority for Health has accredited IMM without reservation. HAS V2010 Certification (July 2013): www.has-sante.fr/portail/upload/docs/application/pdf/2013-07/7371rs_additif1_vd.pdf Intern Quality Certification (Scope santé): www.scopesante.fr/fiches-detaillees/750150104/

National ranking

The IMM Hospital is known for providing the highest quality patient care that modern medicine has to offer.

In the latest rankings of French Hospitals by the ‘Le Point’ magazine, the most important independent classification of Private and Public Health care institutions in France, The Institut Mutualiste Montsouris was ranked in the top 50 hospitals in the country. It was also ranked highly in the following areas on a national base:

Treatments for the cancers:

  • Prostate (1)
  • Bladder (2)
  • Lung (3)
  • Kidney (9)
  • Stomach or esophagus (11)
  • Colon (20)


  • Cataract (6)

Bone and joint Surgery:

  • Knee prosthesis (23)

Digestive surgery :

  • Rectum surgery (25)

Vasculary surgery:

  • Varicose veins (13)
  • Artery surgery (16)


  • Pacemaker (9)
  • Cardiac Surgery (12)

Urology / Gynecology:

  • Prostate adenoma (7)
  • Urinary incontinence (13)


  • Back surgery (24)

source: the leading French weekly newsmagazine Le Point’s “2017 FRENCH BEST PRIVATE HOSPITALS” (Le Point’s hospital ranking is an established and influential one and presents an annual report of France’s hospitals and health care providers.)

Cutting-edge technology supports surgeons, physicians, nurses, and researchers in managing, treating, and supporting the ensemble of procedures that they provide. Advanced technical support includes platforms for pneumological exploration, gastrointestinal and urological study, and otolaryngological and cardiovascular research, as well as makes use of an array of equipment for trachea-bronchial endoscopy and echo-endoscopic procedures.

The IMM operates through 8 medical and surgery group of departments to guaranty a multidisciplinary approach :

CARDIAC AND VASCULAR medico-surgical department

  • DIGESTIVE disease’s department
  • ORTHOPAEDIC surgery
  • THORACIC medico-surgical department
  • UROLOGY medico-surgical department

Main departements’ description

Cardiac and Vascular Medico-Surgical Department

The division of Cardiac Medico-Surgical Pathology provides diagnosis and treatment for both acquired and congenital heart disease in adult and children’s over 30 kg. The division has a long tradition of managing advanced coronary artery disease with the use of off pump revascularization in appropriate candidates, as well as repair of complex heart disease. In addition all aspects of cardiac surgery are performed except heart transplantation including; the full range of aortic pathologies from ascending and descending aorta to acute aortic dissection; and also complex mitral valve repair. A special interest of the department is devoted to the development of minimal invasive techniques which include currently operation of video surgery and robotic surgery, using minimal incision for closures of heart defect as well as valve repair or replacement and aorta-coronary bypasses.

The cardiac surgery department is located on the 5th floor of The IMM Hospital with a capacity of 49 beds, the intensive cardiac unit has 12 beds with 24 hour coverage by an in house cardiologist with competence in angioplasty, and the post cardiac surgery unit has 10 beds.

In addition to surgery, a coronary artery catheterization laboratory is located on the first floor which allows the practice of angioplasty and catheterization and interventional cardiology.

Digestive Diseases Department

The digestive disease’s department includes the medical and surgical specialty.

Together, gastroenterologists, hepatologists, doctors performing endoscopies and surgeons will decide on the diagnosis and treatment of diseases of the digestive tract.

Diseases of the digestive tract include:

  • Diseases of the gastrointestinal system: oesophagus – stomach – small intestine – large intestine – rectum – anus
  • Disorders of the liver and biliary tract disease: liver – pancreas – gallblader – and biliary tract.
  • Diseases of the abdominal layer: inguinal, crural and incisional hernias, rectal prolapses.
  • Diseases of other intra-abdominal glands such as spleen and adrenal glands.
The departments subspecialties

The wide range of knowledge and techniques covered by the field of “digestive diseases” has led us to focus our activity in the following areas:

  • Digestive oncology by using laparoscopic surgical techniques and interventional endoscopies.
  • Surgical treatments of the gastrointestinal, pancreatic, hepatic and biliary tract diseases.
  • Diagnosis and treatments for inflammatory bowel disease: ulcerative colitis and Crohn’s disease
  • Surgical treatments of abdominal incisionnal hernia
  • Diagnosis and treatment of perineal diseases such as digestive prolapses and medical ans surgicalproctology

With its technical support facilities, the Gynecological Surgery Unit provides patients with high-quality surgical solutions in a multidisciplinary environment and in close collaboration with corresponding physicians, whether they are gynecologists or generalists.

IMM gynecological surgeons’ use of the da Vinci Robot provides the optimal treatment of complex pathologies: pelvic organ prolapse, gynecologic cancers, myomectomies, and endometriosis. The viewing quality and accurate placement of its functional components enable unrivaled precision in dissection and suture.

The gynecological surgery team offers its patients the widest range of operating techniques and provides the latest technologies available. The activity is oriented toward reconstructive pelvic surgery and minimally invasive.

IMM gynecologists, surgeons, and physicians have extensive expertise in treating several pathologies and diseases, including:

  • Pelvic static disorders (prolapse) and urinary incontinence
  • Cancers
  • Genital malformations
  • Benign and cancerous pathologies of the vulva and vagina
  • Benign uterine pathologies
  • Ovarian disorders
  • Sterility surgery

Meanwhile, IMM’s Mother–Baby Unit specializes in culturally competent pregnancy care, as well as high-risk pregnancy care, and is recognized across France for its excellence in serving women with highly trained obstetricians, midwives, family medical doctors, and nurses. The unit offers top-of-the-line edge-assisted reproductive technology (ART) services, including in vitro fertilization (IVF) and single-embryo transfer—all in highly individualized, private settings.

Obstetrical activity is made of 2000 deliveries per year on average (Maternity level I).

Ophthalmology unit

The activity is oriented toward the anterior segment (cataract surgery) with ambulatory treatment. The development of posterior segment is a current project (Retinal surgery).


The Orthopedic Surgery Department is an established leader in advanced orthopedic care. It offers comprehensive services for a full spectrum of musculoskeletal conditions and top expertise in four predominant kinds of surgery:

  • Complex spine surgery
  • Hip replacement surgery
  • Knee surgery
  • Foot and ankle surgery
  • The last evolution is the development of upper limb surgery with ambulatory activity. Each specific activity is managed by a senior hyper specialist surgeon.

Major particularities are related to the highly technological necessities of spinal surgery, total hip replacement, and combined procedures for spinal and thoracic cancer. The Orthopedic Surgery Department provides cutting-edge technologies (e.g., image transmission with medical imaging) and remains dedicated to both basic and clinical research as means to develop new prosthetic devices and support, as well as surgical techniques.


The Thoracic Surgery Department is a full-service clinical and research unit providing a wide range of diagnostic services and the ongoing management of conditions affecting the lung, including asthma, chronic obstructive pulmonary disease (COPD), lung cancer, bronchiectasis, tuberculosis, and more unusual conditions.

It deals with:

  • the diagnosis and treatment of adult respiratory tract pathologies: lungs, bronchi, trachea, pleura, mediastinum, chest, diaphragm, and pulmonary arteries. Treatment of primary, or secondary malignant tumors of the lungs, bronchi and mediastinum.
  • Surgical treatment of thoracic and diaphragmatic pathologies: benign and malignant tumors, acquired and congenital chest wall deformities.
  • Medical respiratory pathologies: acute and chronic diseases of the respiratory tract.
  • Endoscopic surgery and new techniques in minimally invasive surgery, especially in the following areas: pulmonary, pleural and mediastinal diseases, hyperhidrosis (sympathectomies), and intrathoracic lesions of the oesophagus.
  • Bronoscopy fibroscopies and spirometry as well as endoscopic treatment of tracheo-bronchial diseases (prosthesis).
  • Diagnosis and treatment of thromboembolic venous diseases (phlebitis and pulmonary embolisms).
Other orientations

Endocrine surgery (thyroid, parathyroid, adrenal glands), Splenic surgery and surgery of some esophageal diseases, Ear, Nose and Throat consultations are available on daily base.

Physicians’ and surgeons’ efforts in the Thoracic Surgery Department are directed at improving treatment results by using minimally invasive techniques and combining surgery with chemotherapy, radiation therapy, gene therapy, and novel therapeutics. The department is led by four full-time thorasic-pulmonologist surgeons, who are supported by a team of junior doctors, specialist nurses, and a physiotherapist. Some of the specialized activities that the department provides include treatment of malignant tumors, both primary and secondary (i.e. metastatic), affecting the lungs, bronchi, and mediastinum. Treatment and post-operative follow-ups are conducted in a multidisciplinary approach, as well as in cooperation with the Oncology Department and several medical-oncology departments of the Ile-de-France area.


IMM physicians and surgeons are dedicated to providing state-of-the-art medical and surgical care in all aspects of adult and pediatric urology. IMM’s Urology Department has proven expertise in prostate cancer diagnosis, staging, and treatment. World-renowned pathologists and specialists can identify cancer cells at a much earlier stage of diagnosis to ensure the best outcomes, while surgeons and oncologists work together to develop the best course of treatment. IMM’s urologists have extensive expertise in surgical techniques, including:

Robotic radical prostatectomy (the da Vinci Robot, Intuitive Surgical, USA)



High intensity-focused ultrasounds (Ablatherm®)


Focal therapy

Robotic radical prostatectomy has been performed in the department since 2001, during which time IMM pioneered the development of the technology. Using the laparoscopic approach developed at IMM since January 1998, the robotic approach combines laparoscopic and robotic advantages: 3-D vision, highly precise dissection, and a minimally invasive approach. More than 6,000 patients have been treated since this early period, and statistics support the efficiency of the robotic system and its outstanding results in terms of less blood-transfusion required, lesser post-operative pain, shorter hospitalization days, and on a functional level, less affected urinary system functioning and sexual activity.

Academic role

The department is affiliated with the Paris-Descartes University.

The departments subspecialties

The Urology team has the greatest world experience in the laparoscopic surgery for cancer. He was the second team after the Lyon’s team to use the focused ultrasounds (HIFU) to treat prostate cancer and actually developed a brachytherapy protocol.

European School of Surgery

The European School of Surgery, affiliated to the Paris-Descartes University, is devoted to train surgeon in laparoscopic surgery.

Research teams and specialists at IMM have a long-term commitment to investigating, supporting, and delivering cutting-edge research in several medical areas involving the following departments:

  • Gynecological Surgery Department
  • Department of Maternal and Child Care
  • Department of Internal Medicine
  • Department of Orthopedics
  • Department of Cardiac Pathology
  • Department of Gastrointestinal Disorders
  • Department of Adolescent Psychiatry
  • Intensive Care and Reanimation Department
  • Thoracic Department
  • Department of Urology

Moreover, IMM hosts and supports the IRMM Research Institution (formerly IMM Research), which is dedicated to preclinical surgical research. Years of experience and cutting-edge equipment make IRMM a leader in research and novel clinical trials.

IRMM also specializes in developing and conducting early studies of novel medical equipment and has been accredited by Good Laboratory Practice (GLP) in its performance of feasibility studies and technological transfer regarding the above mentioned new medical equipment.

IRMM boasts numerous excellent collaborations that can occur in different dimensions and levels: between institutes or, more commonly, among institutes and private companies that require their medical equipment to be tested. IRMM counts hundreds of collaborations and partnerships with innovative and sector-leading medical companies, as well as with operative units and medical departments of several French hospitals and research institutes.