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Summary
Dr. John Brennan is an experienced physician specializing in internal medicine, family medicine, and emergency medicine. He earned his medical degree from the University of Wisconsin School of Medicine & Public Health and has practiced for 59 years, bringing extensive clinical expertise to patient care. Dr. Brennan is fluent in both Spanish and English.
Dr. Brennan is affiliated with Mayo Clinic Health System Sparta and practices in La Crescent, Minnesota. His clinical focus includes treating conditions such as acute sinusitis and sinusitis. He performs diagnostic procedures including facial X-rays and sinus X-rays to help evaluate and diagnose patient conditions.
Dr. Brennan is affiliated with Mayo Clinic Health System Sparta and practices in La Crescent, Minnesota. His clinical focus includes treating conditions such as acute sinusitis and sinusitis. He performs diagnostic procedures including facial X-rays and sinus X-rays to help evaluate and diagnose patient conditions.
Overview based on verified provider data
Quick Facts
- 59 years of experience
- 1 insurance plan accepted
- speaks Spanish, English
- University Of Wisconsin School Of Medicine & Public Health
- 3 specialties
- 5 areas of expertise
- 3 board certifications
- 1 hospital affiliation
- 1 office location
- Male
Office Location
Compare with Similar Doctors
 |  |  | |
| Dr. John Thaddeus Brennan, MD | Dr. Michelle Xiao Song, MD | Dr. Edward Gerard Rydell, DO | Dr. Joseph Leonard Quetsch |
| Internal Medicine | Internal Medicine | Emergency Medicine | Emergency Medicine |
| Accepts New Patients | |||
| 59 Years of Experience | 6 Years of Experience | 50 Years of Experience | 47 Years of Experience |
| No Virtual Visit Option | Virtual Visit Available | No Virtual Visit Option | No Virtual Visit Option |
| Speaks Spanish, English | Speaks English, Mandarin, Spanish | ||
| La Crescent , MN | Denver , CO | Onalaska , WI | LA CROSSE , WI |
| Med School: University Of Wisconsin School Of Medicine & Public Health | Med School: UCLA's David Geffen School of Medicine | Med School: Des Moines University College Of Osteopathic Medicine | Med School: University Of Iowa |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. John Thaddeus Brennan
Medical Specialties
Dr. John Thaddeus Brennan has the following 3 specialties
Specialty Expertise
Dr. John Thaddeus Brennan has the following 5 areas of expertise
Certifications, License, & Education
59 Years Experience
Dr. John Thaddeus Brennan holds an inactive medical license in the state of Minnesota.
Medical License
Medical Doctor with an inactive medical license in the state of Minnesota.
Education & Training
Medical School
Graduated from University Of Wisconsin School Of Medicine & Public Health in 1967.
NPI Number
Dr. Brennan's NPI number is 1891776977.
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Frequently Asked Questions
- Does Dr. John Brennan accept my insurance?
- You can see the insurance plans that Dr. John Brennan accepts on their Vitals profile.
- What languages does Dr. John Brennan speak?
- Dr. John Brennan speaks Spanish and English.
- Which hospitals is Dr. John Brennan affiliated with?
- Dr. John Brennan is affiliated with Mayo Clinic Health System Sparta.
- Is Dr. John Brennan accepting new patients?
- Dr. John Brennan has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
- How can I make an appointment with Dr. John Brennan?
- You can find contact information for Dr. John Brennan here on Vitals.
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