0 reviews
Summary
Dr. Timothy Niessen is an internal medicine physician who earned his medical degree from Johns Hopkins University School of Medicine. With 17 years of experience in internal medicine, he focuses on diagnosing and treating a wide range of adult health conditions. His medical training at one of the nation's leading medical institutions has prepared him to provide comprehensive care for complex medical issues.
Dr. Niessen practices at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center in Baltimore, Maryland. He has particular expertise in managing electrolyte imbalances, which can affect heart rhythm and muscle function. Additionally, he treats patients with tobacco use disorder, helping them overcome nicotine addiction and its health consequences. Dr. Niessen also cares for women experiencing acute fatty liver during pregnancy, a serious condition that requires specialized monitoring and treatment.
Dr. Niessen practices at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center in Baltimore, Maryland. He has particular expertise in managing electrolyte imbalances, which can affect heart rhythm and muscle function. Additionally, he treats patients with tobacco use disorder, helping them overcome nicotine addiction and its health consequences. Dr. Niessen also cares for women experiencing acute fatty liver during pregnancy, a serious condition that requires specialized monitoring and treatment.
Overview based on verified provider data
Quick Facts
- 17 years of experience
- 6 insurance plans accepted
- Johns Hopkins University School Of Medicine
- 1 specialty
- 7 areas of expertise
- 1 board certification
- 1 hospital affiliation
- 4 office locations
- Male
Office Locations
Dr. Timothy Michael Niessen has 4 locationsJohns Hopkins Hospital Pediatric Gastroenterology And Nutrition
600 N Wolfe St # 120Baltimore, MD 21287 Tel: (410) 955-8769
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 - 5:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
![]() | ![]() | ![]() | ![]() |
| Dr. Timothy Michael Niessen, MD | Leanne Antioquia, FNP | Dr. Sharon McCormack, MD | Dr. Sohan Varma, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 17 Years of Experience | 41 Years of Experience | 16 Years of Experience | |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | Virtual Visit Available |
| Speaks English | Speaks English | Speaks English, Hindi, Punjabi, Urdu | |
| Baltimore , MD | Bowie , MD | Columbia , MD | Chantilly , VA |
| Med School: Johns Hopkins University School Of Medicine | Med School: University of Maryland School of Medicine | Med School: Ross University School Of Medicine | |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Timothy Michael Niessen
Medical Specialties
Dr. Timothy Michael Niessen has the following specialty
Specialty Expertise
Dr. Timothy Michael Niessen has the following 7 areas of expertise
Certifications, License, & Education
17 Years Experience
Dr. Timothy Michael Niessen holds an active medical license in the state of Maryland.
Medical License
Medical Doctor with an active medical license in the state of Maryland that expires in 2027.
Education & Training
Medical School
Graduated from Johns Hopkins University School Of Medicine in 2009.
NPI Number
Dr. Niessen's NPI number is 1730322900.
Similar doctors
Frequently Asked Questions
- Where is Dr. Timothy Niessen's office located?
- Dr. Timothy Niessen's office is located at 600 N Wolfe St # 120, Baltimore, MD, 21287.
- How can I make an appointment with Dr. Timothy Niessen?
- You can find contact information for Dr. Timothy Niessen here on Vitals.
- Is Dr. Timothy Niessen accepting new patients?
- Dr. Timothy Niessen has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
- Does Dr. Timothy Niessen accept virtual/telehealth appointments?
- Dr. Timothy Niessen has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- Does Dr. Timothy Niessen accept my insurance?
- You can see the insurance plans that Dr. Timothy Niessen accepts on their Vitals profile.
Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews
Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.





