Locations
Office
Sioux City, IA
Phone
Practice website
Insurances accepted
Aetna Life Insurance Company
UnitedHealthcare
Cigna
Golden Rule Insurance Company
About
Bio
Dr. Nielsen practices phlebology in Sioux City, Iowa. He is a diplomate of the American Board of Phlebology and is also board certified in general surgery by the American Board of Surgery and in cardiothoracic surgery by the American Board of Thoracic Surgery. He is a Fellow of the American College of Surgeons and the American College of Phlebology and is a member of the the Society of Thoracic Surgeons. He is a Registered Vascular Technologist by the American Registry for Diagnostic Medical Sonography (ARDMS). Dr. Nielsen practiced general surgery for three years and cardiothoracic and vascular surgery for seventeen years prior to dedicating his practice to the treatment of venous disease.
SpecialtiesDoctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Phlebology
Doctor Q&A
56 Answers
35 Agrees
The number of answers this doctor has agreed with.
A 46-year-old member asked:

Dr. Mark Nielsen answered
38 years experience Phlebology
Good results likely: I would recommend seeing a vein specialist/phlebologist who can speak with you, examine your legs, likely perform an ultrasound of the veins of your l ... Read More
4
4 thanks
A 36-year-old member asked:

Dr. Mark Nielsen answered
38 years experience Phlebology
Yep...sure can: Compression stockings can be very useful and actually the primary treatment in those patients with venous insufficiency, whether of the deep veins or ... Read More
6
6 thanks
A 34-year-old member asked:

Dr. Mark Nielsen answered
38 years experience Phlebology
None to fade them...: There really are no home remedies for fading varicose veins away. You can, however, treat the symptoms (aching, heaviness, swelling) with compression ... Read More
7
7 thanks
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
TestimonialsRecommendations and Thank you notes are endorsements given from patients or other doctors.
Recommendations and Thank you notes are endorsements given from patients or other doctors.
4
Recommendations
142
Thank you notes
Dr. Ted King
Jul 12, 2012
An excellent phlebologist and a terrific doctor.
Jul 12, 2012
Obviously great knowledge and experience
HealthTap member
Mar 30, 2015
Dr. Nielsen is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Thank you, your answer was very helpful! Very grearfulx
HealthTap member
Thank you, your answer was very helpful!
HealthTap member
Thank you, your answer was very helpful!
Education & Training
Medical/Graduate school
University of North Dakota School of Medicine and Health Sciences, ND
Graduated 1983MD
Awards
Fellow of the American College of Surgeons
Fellow of the American College of Phlebology
Member, Society of Thoracic Surgeons
Affiliations
Siouxland Vein Center
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