Biography & Education

Dr. Janssen specializes in the care of adult patients, providing a spectrum of care from health and wellness to complex disease management. He is passionate about his role as a primary care internist in the management and coordination of care for patients with a broad range of illness. His philosophy of practice is to utilize evidence based medicine and effectively communicate with patients using a shared decision making model of care. His goal is to provide compassionate care through the application of scientific knowledge and clinical expertise.
  • Internal Medicine
Education Background
Medical School: University of Washington School of Medicine
Residency: Darthmouth Hitchcock Medical Center
  • English
Personal Interests
Dr. Janssen enjoys spending time with his family, outdoor recreation including hiking and skiing, travel, gardening, and home improvement.

Care Locations

5350 Tallman Ave. N.W.
Suite 301
Seattle, WA 98107
Fax 206-320-8027
Accepting New Patients
Accepting Medicare


Patient Ratings and Comments
About Our Survey

The Patient Rating score is based on responses given during the CAHPS Patient Experience Survey. Responses are measured on a 10-point scale, with 10 being the best score. These scores are then translated to a 5-point scale in order to display results in a 5-star rating. Comments are also gathered from the same survey and displayed in their entirety with the exception of any language that may be considered slander, libel or contain private health information, which will be removed prior to publishing the comments.

4.4 out of 5 (133 Ratings, 14 Comments)


I have painful sciatica. He doesn't believe in pain meds so I'm always in pain & resent it. [...]
Swedish Patient

100% correct diagnosis and prompt referral.
Swedish Patient

A great group of people!
Swedish Patient

Dr. Jannsen is a class act. I really like this guy. [...]
Swedish Patient

Very excellent first visit to a new provider.
Swedish Patient

I am a retired Internist, which probably makes communication go smoother. We are getting to know each other better since he took over my care 1-2 years ago.
Swedish Patient

Dr. Janssen was awesome & spent almost an hour with me at very short notice. I am so happy to have him as a doctor!
Swedish Patient

Dr. Janssen is an excellent physician.
Swedish Patient

Swedish Patient

The provider is very good and knowledgeable about traditional medicine; however, I felt that he was not as aware about alternative medicine. I have also been seeing a natrupath on a regular basis to supplement.
Swedish Patient

One of the first doctors I've seen in a long time that didn't seem to have something else to do, other than pay attention to me. super!
Swedish Patient

I was actually pleasantly surprised at the amount of time Dr. Janssen spent with me! Being a new patient and only wanting a refill for a prescription, I wasn't expecting much. He talked with me for about 1/2 an hour, which is much longer than any other physician I've seen has done.
Swedish Patient

As for Dr. Janssen, he was very dismissive of my symptoms and through extensive email communication, he has failed to actually answer any of my simple questions regarding my test results. Throughout both of my visits, he seemed apathetic, bored and uninterested in my case. There were SEVERAL errors in my chart when I reviewed it on MyChart. Dr. Janssen's bedside manner is the absolute worst I have ever seen; and I have seen a lot of doctors, having worked in healthcare for many years. He refuses to explain anything so that its understandable to the layman (luckily, I am familiar with medical terminology) and I left both appointments in tears and feeling de-validated, as he brushed off my swollen joints as "anxiety and hot flashes." I will be seeking a new doctor. On a side note, he became noticeably frustrated when I could not remember the name of a prescription he prescribed me. He was clearly irritated he had to look it up in the computer. Also, the RX he prescribed for a rash didn't work. When I asked him what we should do next, he shrugged, rolled his eyes and begrudgingly gave me a referral to a dermatologist.
Swedish Patient

I have a complicated problem, that takes some out of the box thinking. He only thinks in very limited bands, and is going over territory I have already covered. I don't feel he will be one of the key players to get me a few steps better.
Swedish Patient