Our Doctors
We pledge to dedicate every resource we have to fulfill our promise of delivering exceptional service to our patients.
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By Condition / Disease
By Department
Dr. Ashraf Kamel
Urology & Andrology
Dr. Ralf Herwig
Urology & Andrology
Dr. Kai Uwe Köhrmann
Urology & Andrology
Dr. Martin Sillem
Obstetrics & Gynecologist
Dr. Gerald Zimmermann
Orthopedic Surgeon
Dr. Marwan El-Khazen
Orthopedic Surgeon
Dr. Liselotte Mettler
Obstetrics & Gynecologist
Dr. Maria Nikolopoulou
Obstetrics & Gynecologist
Dr. Khaldoun Sharif
Obstetrics & Gynecologist
Dr. Diethart Bayer
General Surgery & Proctology
Dr. Alaeddin Saghir
Endocrinology Treatment
Dr. Ritu Manchanda
Homeopathy
Latest News and Blogs
We partner with a wide range of insurance providers to offer access to highly specialized care for you and your family.
July 19, 2026
Unexplained Weight Gain? Your Hormones Could Be Playing a Bigger Role Than You Think
Not all weight gain is caused by overeating or lack of exercise. Hormonal imbalances can influence metabolism, appetite, fat storage,...
July 17, 2026
Enlarged Prostate Symptoms Every Man Should Know Before They Affect Daily Life
Many men assume urinary changes are simply a part of ageing, but they can often be early signs of an...
July 13, 2026
Chronic Constipation: When Is It More Than Just a Digestive Issue?
Chronic constipation is more than an occasional inconvenience. If symptoms persist for weeks or months, they may indicate an underlying...
July 11, 2026
Blood in Your Urine? Here’s Why You Shouldn’t Ignore It
Noticing blood in your urine can be alarming, whether it happens once or repeatedly. While some causes are relatively minor,...
June 25, 2026
Could Insulin Resistance Be Behind Your Fatigue, Weight Gain, or Cravings?
Gaining weight despite maintaining a healthy diet and regular exercise can be frustrating....
Our Clients Testimonials
I will high recommend German Medical Center, as they are trustworthy ,supportive, unwavering dedication and genuine concern. The nurses really excellent and compassions, I am soo grateful to everyone who helped me a-lot through out my surgery. Mr.Rashid you are really incredible and thank you so much for your help and support.
Hodroj Remmel
Helpful, friendly 😀 smiles , doctor explain everything more than more and give advice . I like follow up from clinic.
Esam Alnajjar
I visited the clinic many times for various situations, I am always grateful to the doctors and attendants, for many years I have been turning to them, thank you for the good caring service
Natalia Fedotova
I would like thank Prof.Zimmermann and the clinic and the staff…. I was waiting for this moment that my mom to be fine. I will definitely recommend German Medical Center
Asma Atfeesh
I don't know what to say. First of all, I would like to thank Dr. Marwan for his advice and treatment. Before I visited the clinic, I was suffering from left shoulder pain that I can't sleep at night, after I got a treatment I feel much better and no pain anymore.
Also, many thanks for all staff and his nurse.
Mohamed Binsafwan
Professor Sillem was the first doctor to diagnose my endometriosis and removed it surgically. I was pleasantly surprised by the success of the surgery, especially on my bladder.
During a laparoscopy, a septum was also discovered and removed in a separate operation. This procedure, too, was performed very well in my opinion.
Professor Sillem consulted me thoroughly before each operation, and I felt I received excellent medical care.
Clara Hoffmann
Went for lipoma removal and had been a great experience: Dr Bayer and his staff are the perfect surgical partner and care advisor. Highly recommended. The actual intervention and the followup were very smooth and worry-free. Thank you very much indeed.
Silvia at Fokus
I had a surgery in this clinic with Dr. Mettler, everything went really great. Also had a chance to visit Dr. Maria and had a great experience. Highly recommended for everyone looking for a treatment.
Ievgeniia Rynzhuk
Very professional staff and very experienced Drs, Dr Ralf very professional special thanks to Mishita, Islam and Joan and finalyJanlile .. amazing well organised staff.. well done
Samer Othman
Prof. Dr. Sillem operated on my bladder for endometriosis for the first time in the fall of 2016, and in early March 2025, he removed my uterus. I feel very well looked after by him – he takes his time, listens, and addresses my concerns. The aftercare for both surgeries was also excellent – he checked on me several times after the surgery. I always feel in good hands with him; I highly recommend him!
M. Schneider
Amezing place amezing staff also specially the doctors are really nice they treat very well thank you so much .I was meet with doctor ashraf Kamal Aly and doctor mohamed they are really nice friendly I wanna say thanks to buth of them 🙏🙏
S. Hussain
Excellent care at German Medical Center.
I would like to highlight the outstanding professionalism and kindness of Dr. María and the entire team. From the very first moment, I felt well cared for, listened to, and in good hands. The attention was warm, clear, and efficient. I highly recommend this medical center.
Eva Fernandez


