Dr. J Demay, MD

Dr. J Demay, MD

Dermatology  ·  
Male  ·  
Age 57
Dr. J Demay, MD is a dermatologist in Sioux City, IA and has been practicing for 24 years. He graduated from University Nebraska Medical Center in 1989 and specializes in dermatology.Read his story

2930 Hamilton Blvd Ste 102

Sioux City, IA 51104

Contact Information

Insurance Accepted

  • Aetna
  • Avera
  • Blue Cross Blue Shield
  • Cigna
  • Coventry Health Care
  • DakotaCare Administrative Services, Inc (DAS)
  • First Health (Coventry Health Care)
  • HealthPartners
  • Humana
  • 11 More

*Please verify this information when scheduling an appointment.

Learn about Dr. Demay

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you.

Top Care Areas

See how frequently Dr. Demay performs your care needs compared to other doctors.

very high
more than 99% of peers
very high
more than 99% of peers
Skin Infections
very high
more than 99% of peers

Dr. Demay's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

Dr. Demay's bio

This content was provided by Dr. Demay "Dr. Mark DeMay joined Ziebell, Oss, Rossiter & DeMay in 1997. After losing two senior partners in 2000 the clinic name was changed to Rossiter & DeMay, LLP. Dermatology Associates of Siouxland, PC was established in 2012 when Dr. James Rossiter retired. J. Mark DeMay, MD is a Board Certified Dermatologist, treating patients in Siouxland for over 20 years. An expert in all facets of dermatology. He is a graduate of Creighton University and the University of Nebraska Medical Center. He completed his internal medical residency at Good Samaritan Hospital and Medical Center, Portland OR and his research fellowship and dermatology residency at Oregon Health Sciences University, Portland, OR. Dr. DeMay's research interests include Psoriasis, Atopic Dermatitis, and Dermatomyositis and Sweet's Syndrome. He has received numerous honors and awards, and maintains memberships in several medical associations. Including the National Psoriasis Foundation and American Acne and Rosacea Society. He additionally supports the Skin Cancer Foundation and the National Eczemz Association. Dr. DeMay treats a broad array of skin conditions in patients of all ages. His mission is to bring relief to his clients through empathetic, experience-based treatment and ongoing education concerning the health of their skin. David Grote, PA-C joined the practice in 2014. A native of Sioux City, IA. He studied at Wayne State University of Wayne, NE and the University of IA, Iowa City, IA, and completed the University of Oklahoma-Army PA Program in 1989. He has extensive experience in medical settings throughout Nebraska and Iowa, and is an Iowa Army National Guard veteran. David is passionate about providing patients dealing with the physical and emotional pain of skin conditions with professional, cutting-edge treatment in a concerned environment. "
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Care Philosophy

This content was provided by Dr. Demay "At Dermatology Associates of Siouxland, PC our philosophy of care represents more than a viewpoint; it's a commitment. Every member of our team has pledged their personal responsibility, giving our patients and families care that is supported by the highest order of compassion, innovation, science, and technology."

1  Specialties

  • Dermatology

1  Board Certifications

  • Dermatology
    Accredited by: American Board of Dermatology*

73  Conditions Treated

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10  Procedures

  • Abscess or Cyst Drainage or Aspiration
  • Abscess or Fluid Incision and Drainage
  • Acne Surgery
  • Destruction of Benign Skin Lesion
  • Destruction of Malignant Skin Lesion
  • Excision of Benign Skin Lesion
  • Excision of Skin Cancer
  • Excision of Skin Lesion
  • Shaving of Skin Lesion
  • Skin Tag Removal

Background Check

Malpractice Claims not available

Healthgrades does not collect malpractice information for Iowa.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Creighton University
    Undergraduate School | Graduated 1984
  • University Nebraska Medical Center
    Medical School | Graduated 1989
  • Oregon Helath Sciences University
    Internship Hospital | Completed 1994
  • Oregon Health Sciences University
    Residency Hospital | Completed 1997
  • Oregon Health Science University
    Fellowship Hospital | Completed 1994

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Demay has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Demay does not have any memberships or affiliations listed. If you are Dr. Demay and would like to add memberships or affiliations, please update your profile.

Dr. Demay's Reviews

Likelihood of recommending Dr. Demay to family and friends
28 total reviews (4 have comments)

Likelihood to Recommend (28)

  • 5
  • 4
  • 3
  • 2
  • 1

Dr. Demay's Performance

  • Trustworthiness

  • Explains condition(s) well

  • Answers questions

  • Time well spent


Office & Staff Performance

  • Scheduling

  • Office environment

  • Staff friendliness

  • Average wait time

    16 to 30 minutes

Patient Comments (4)

Great doctor. I wouldn't go anywhere else!
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Dr Demay is very professional and obviously knows his work. I trust his decisions and he tells me about my options.
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Dr DeMay is a great doctor! He is approachable and he knows his stuff!
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Awesome doctor, our family loves him.
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