4
20 Ratings with 5 written Reviews
Summary
Dr. John Demay treats skin changes during pregnancy, acne vulgaris, and alopecia areata, and performs kidney transplant biopsy and nerve biopsy. He practices dermatology and has 37 years of experience. Dr. Demay earned his medical degree from the University of Nebraska College of Medicine and completed his residency at Oregon Health & Science University. He is affiliated with Saint Lukes Regional Medical Center and sees patients in Sioux City, Iowa. Patients on Vitals rate Dr. Demay 3.95 out of 5.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 37 years of experience
- 21 insurance plans accepted
- speaks English
- Oregon Health & Science University
- 5 written reviews
- 1 specialty
- 12 areas of expertise
- 1 hospital affiliation
- 3 office locations
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. John Mark Demay has 3 locationsDermatology Associates Of Siouxland Pc
2930 Hamilton Blvd Lowr FSioux City, IA 51104 Tel: (712) 277-9370
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 12:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  |  |
| Dr. John Mark Demay, MD | Dr. Amit Mittal, MD | Dr. Anna Chacon, MD | Trisha Khanna, MD, FAAD |
| Dermatology | Dermatology | Dermatology | Dermatology |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | Accepts New Patients |
| 37 Years of Experience | 8 Years of Experience | 14 Years of Experience | 8 Years of Experience |
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English | Speaks English | Speaks English, French, Spanish | Speaks English, Spanish, Italian, Hindi |
| Sioux City , IA | Plymouth , MN | Miami , FL | Orlando , FL |
| Med School: University Of Nebraska College Of Medicine | Med School: Yale University School Of Medicine | Med School: Brown Medical School | Med School: Columbia University College Of Physicians & Surgeons |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. John Mark Demay
Medical Specialties
Dr. John Mark Demay has the following specialty
Specialty Expertise
Dr. John Mark Demay has the following 12 areas of expertise
Certifications, License, & Education
37 Years Experience
Dr. John Mark Demay holds an active medical license in the state of Iowa.
Medical License
Medical Doctor with an active medical license in the state of Iowa that expired in 2026.
Education & Training
Residency
Completed their residency at Oregon Health & Science University.
Medical School
Graduated from University Of Nebraska College Of Medicine in 1989.
NPI Number
Dr. Demay's NPI number is 1366447294.
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Frequently Asked Questions
- Where is Dr. John Demay's office located?
- Dr. John Demay's office is located at 2930 Hamilton Blvd Lowr F, Sioux City, IA, 51104.
- How can I make an appointment with Dr. John Demay?
- You can find contact information for Dr. John Demay here on Vitals.
- What languages does Dr. John Demay speak?
- Dr. John Demay speaks English.
- Which hospitals is Dr. John Demay affiliated with?
- Dr. John Demay is affiliated with Saint Lukes Regional Medical Center.
- Does Dr. John Demay accept virtual/telehealth appointments?
- Dr. John Demay has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Healthcare system and provider network data
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