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Dr. Mark S Lowenheim has the following 2 specialties
- Pediatric Gastroenterology
Pediatric gastroenterologists can treat a variety of diseases and conditions in infants and children related to their liver, pancreas or intestines. If your child has severe or recurrent abdominal pain, constipation or diarrhea, a pediatric gastroenterologist can help you get to the bottom of it. They can also help identify the many possible causes of failure to thrive in infants.
Other common conditions they treat include Crohn's Disease, inflammatory bowel disease, liver disease, short gut syndrome and hepatitis C, as well as nutritional disorders like celiac disease and lactose intolerance. In order to diagnose and treat your child’s condition, gastroenterologists can perform colonoscopies and other diagnostic testing before deciding on the best treatment plan.
A pediatrician is a doctor who specializes in the regular care of children, as well as the diagnosis and treatment of illness in children. Young patients are often more complicated to treat because they are still growing and developing.
While pediatricians may sub-specialize in specific therapy areas like oncology, surgery, ophthalmology, and anesthesiology, in general, pediatricians provide services like vaccinations, health exams, and treatment of common ailments and injuries. In addition, pediatricians are trained to handle the complex emotional and behavioral issues faced by children, especially during puberty.
Pediatricians normally see their patients from birth until the age of 18, although some may agree to treat patients into their early 20s, if requested.
- Crohn's Disease
See the board certifications this doctor has received. Board certifications provide confidence that this doctor meets the nationally recognized standards for education, knowledge and experience.
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Dr. Lowenheim is the best pediatric GI doctor I have ever had the pleasure of knowing. He is such a talented, dedicated, professional, accessible, & compassionate individual and his top priority is his patients. Dr. Lowenheim actually listens and addresses questions thoroughly and patiently. I am forever indebted to this man for helping my son and my family get through our darkest days related to my son's serious medical GI issues (as well as other health problems). I recommend him to any parents looking for the most qualified & caring pediatric gastroenterologist for their child.
Dr Lowenheim was the only doctor to find out the reason for my sons stomach pain. He suffered for 16 years and now he is pain free. He is a wonderful doctor and person.
We have been seeing Dr Lowenheim for many years now 19 almost!! my daughter was about 3 months old when we meet Dr "L" and his team at Stony Brook and she was a really sick little girl she was vomiting all the time would not eat or drink "really" I think with out Dr "L" helping us she would not be doing as good as she is now!!!! He has always gone out of his way to go over any of my Questions and work with us on ideas that seem to only work for Our child, during our time with Dr "L" my daughter was Diagnosised with a very rare syndrome Angelman Syndrome we along with him worked together to form a plan to help her and today 19 years latter she has come so far So Thank You Dr "L" you really are one of a kind and I would rate him AAAAA+++
My infant son was diagnosed with reflux by his regular pediatrician. After being prescribed Zantac for a few weeks I went back seeking an alternative treatment being the Zantac was not working.since my ped didn't want to change meds I sought out the help of a specialist. I found Dr. Lowenheim from a google search of gastro doctors in my area. At my first appointment the doctor was very short with me. He did a quick exam of my son and then just told me to increase the dose of Zantac and try a hypoallergenic formula. I don't even know what made him prescribe that being he conducted no tests and/or exams besides feeling his belly. I went home and booked a follow up appointment for 2 weeks. I tried the formula and the increased dose of Zantac during those two weeks. He also told me to bring a soiled diaper so he can test his stool at the next visit. In the two weeks between visits my sons symptoms didn't seem to improve whatsoever. I returned for my second appointment with soiled diaper and all. Again the doctor turned came in did a quick 30 second exam sent me off with more Zantac and yet another formula both again which didn't help. He didn't answer any of my questions, or even take the soiled diaper for testing as he promised. I felt as if it were a COMPLETE and utter waste of time and he made me feel as if I were wasting my time but my money was good enough for him to rob from me on my 2 visits. $60 in copays later I am still stuck with a baby screaming and crying in pain from severe reflux. Dr. Lowenheim provided no answers and or advice. He was very cold, quick and arrogant with me. I do not think I am going to return for my third follow up visit. If you want to throw your money away and be treated like crap then he's the doctor to see if not keep looking and ask friends for some recommendations.
33 Years Experience
Ross University School Of Medicine
Graduated in 1985
Mount Sinai Medical Center
Dr. Mark S Lowenheim accepts the following insurance providers.
- Aetna Choice POS II
- Aetna Elect Choice EPO
- Aetna HMO
- Aetna Managed Choice POS Open Access
- Aetna NYC Community Plan
- Aetna Signature Administrators PPO
BCBS Blue Card
- BCBS Blue Card PPO
- BCBS MA Blue Care Elect PPO
- BCBS MA Preferred Blue PPO
Capital District Physicians Health Plan
- CDPHP New York State of Health - Small Business
- CDPHP PPO
- Connecticare Flex Connecticut
- Empire Blue Priority EPO
- Empire HMO
- Empire PPO
- Empire Prism EPO Blue Priority
- First Health PPO
HIP of NY
- Emblem HIP Select PPO
- Humana Choice POS
- Humana ChoiceCare Network PPO
MVP Health Plan
- MVP Preferred PPO
- Oxford Freedom
- Oxford Liberty
- Oxford Metro
- UHC Choice Plus POS
- UHC Navigate HMO
- UHC Navigate POS
- UHC Options PPO
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Locations & DirectionsMark S Lowenheim Md, 200 Belle Terre Rd # 400, Port Jefferson, NY
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