3.8
5 Ratings
Summary
Dr. William Riesen specializes in internal medicine, bringing 38 years of experience to his practice in Mason City, Iowa. He earned his medical degree from the prestigious Perelman School of Medicine at the University of Pennsylvania and completed his residency training at the University of Michigan Health System. Dr. Riesen is fluent in both English and Spanish, allowing him to serve a diverse patient population.
Dr. Riesen practices at MercyOne North Iowa Medical Center and the MercyOne North Iowa Internal Medicine Residency Clinic, both located in Mason City. His clinical expertise includes diagnosing and treating chest pain and related chest problems. He utilizes diagnostic tools such as electrocardiograms to evaluate heart conditions and incorporates physical therapy and strength training into comprehensive treatment plans. Patients have given him an average rating of 3.8 out of 5 on Vitals.
Dr. Riesen practices at MercyOne North Iowa Medical Center and the MercyOne North Iowa Internal Medicine Residency Clinic, both located in Mason City. His clinical expertise includes diagnosing and treating chest pain and related chest problems. He utilizes diagnostic tools such as electrocardiograms to evaluate heart conditions and incorporates physical therapy and strength training into comprehensive treatment plans. Patients have given him an average rating of 3.8 out of 5 on Vitals.
Overview based on verified provider data
Quick Facts
- 38 years of experience
- speaks English, Spanish
- University Of Michigan Health System
- 1 specialty
- 6 areas of expertise
- 1 hospital affiliation
- 2 office locations
- Male
Patients’ Perspective
- Had a good bedside manner
- Spent time with me
- Provided follow-up after the visit
Based on patient feedback. Read the reviews
Office Locations
Dr. William John Riesen has 2 locationsMercyone North Iowa Internal Medicine Residency Clinic
1010 4th St Sw Ste 305Mason City, IA 50401Mon8:00 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 - 5:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  |  |
| Dr. William John Riesen, MD | Dr. Adewumi Bakare DMSc, PA-C | Dr. Linda Grandgenett Floden, MD | Dr. Madan Mohan Acharya, MD |
| Internal Medicine | Internal Medicine | Family Medicine | Cardiovascular Disease |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 38 Years of Experience | 5 Years of Experience | 39 Years of Experience | 18 Years of Experience |
| No Virtual Visit Option | Virtual Visit Available | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English, Spanish | Speaks English, Spanish, Yoruba, French, Russian, Arabic, Chinese, Chinese (Mandarin) | Speaks English, Spanish | Speaks English |
| Mason City , IA | Mesquite , TX | Mason City , IA | Mason City , IA |
| Med School: Perelman School Of Medicine At University Of Pennsylvania | Med School: University of Lynchburg - DMSc | Med School: University Of Iowa | Med School: Kempegowda Institute Of Medical Sciences |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. William John Riesen
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Dr. William John Riesen has the following specialty
Specialty Expertise
Dr. William John Riesen has the following 6 areas of expertise
Certifications, License, & Education
38 Years Experience
Dr. William John Riesen holds an expired medical license in the state of Iowa.
Medical License
Medical Doctor with an expired medical license in the state of Iowa that expired in 2026.
Education & Training
Residency
Completed their residency at University Of Michigan Health System.
Medical School
Graduated from Perelman School Of Medicine At University Of Pennsylvania in 1993 and YALE UNIVERSITY SCHOOL OF MEDICINE in 1988.
NPI Number
Dr. Riesen's NPI number is 1548377997.
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Frequently Asked Questions
- Which hospitals is Dr. William Riesen affiliated with?
- Dr. William Riesen is affiliated with Mercyone North Iowa Medical Center.
- Where is Dr. William Riesen's office located?
- Dr. William Riesen's office is located at 1010 4th St Sw Ste 305, Mason City, IA, 50401.
- How can I make an appointment with Dr. William Riesen?
- You can find contact information for Dr. William Riesen here on Vitals.
- Is Dr. William Riesen accepting new patients?
- Dr. William Riesen has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
- Does Dr. William Riesen accept my insurance?
- You can see the insurance plans that Dr. William Riesen accepts on their Vitals profile.
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