Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Michael Eric Janssen, MD

Individual provider Internal Medicine Physician · NPI 1194804161

Dr. Michael Eric Janssen, MD practises Internal Medicine in Seattle, Washington. Graduated from University of Washington School of Medicine in 2004, 22 years ago. Practices with Select Outpatient Services Inc, a 790-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in New Hampshire, Washington and Wyoming.

Years since qualifying
22
Trained at
University of Washington School of Medicine
Licensed in
NH, WA, WY
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5350 Tallman Ave NW Ste 301
Seattle, WA 98107-5902
Phone: (206) 320-3335
Fax: (206) 320-8027
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 500 17th Ave, Seattle, WA 98122-5711 — (206) 320-2230

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD60344899 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence RT-1351 (NH)
Internal Medicine Physician Taxonomy 207R00000X · Licence TL1017 (WY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 13498 (NH)

Record details

NPI number1194804161
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 2, 2006
Last updated in NPPESOctober 7, 2020
Certification dateOctober 7, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Select Outpatient Services Inc — 790 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 16 times · 63rd percentile
Removal or shaving of skin growth 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients312
Services billed 4,148 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Select Outpatient Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 790 clinicians in the practice; 12 are shown here.

Other providers in Seattle