Michael Eric Janssen, MD
Internal Medicine Physician · Seattle, WA
Michael Eric Janssen, MD is an internal medicine physician with a practice address in Seattle, Washington, and NPI 1194804161, issued on Nov 2, 2006. Check the license (Washington MD60344899, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Michael Eric Janssen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD60344899 WA
13498 NH
RT-1351 NH
TL1017 WY
Self-reported in NPPES; status is on the state search - Practice location
- 5350 Tallman Ave NW, Seattle, WA 98107
- Phone
- (206) 320-3335
- Enumerated
- Nov 2, 2006
- Record last updated
- Oct 7, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (206) 320-8027
- Medicaid ID
- 1194804161 WY
- Medicare enrollment
- Enrolled (PECOS I20140411000983); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 5350 Tallman Ave NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Eric Janssen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60344899Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% more Medicare Part D claims than the average internal medicine physician in 2024
6,023 Medicare Part D claims for 465 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 68 claims were for opioids.
Most prescribed
- Atorvastatin Calcium754 claims
- Amlodipine Besylate285 claims
- Lisinopril249 claims
- Losartan Potassium237 claims
- Levothyroxine Sodium180 claims
- Hydrochlorothiazide169 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 3 group practices
- Select Outpatient Services IncGlenview, IL
- Select Rehabilitation, LLCGlenview, IL
- Swedish Health ServicesSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Eric Janssen among 3,079 internal medicine physician records in Washington
Michael Eric Janssen, MD is one of 3,079 internal medicine physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2004 · median 2006 among the 1,852 with a school on file
- Record last updated2020 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
821 internal medicine physician records list a practice address in Seattle
They are 821 of the 41,956 NPPES records with a practice address in Seattle, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Seattle → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Aoyama, MDSeattle, WA 981071952384711
- Amy Deans, MDSeattle, WA 981071568546281
- Warren Fein, MDSeattle, WA 981071659455376
- Richard Fogerty, M.D.Seattle, WA 981071346223815
- Aubrey Girolamo, M.D.Seattle, WA 981071902123623
- Elizabeth Kracen, M.D.Seattle, WA 981071588894679
- Matthew Noell, M.D.Seattle, WA 981071952711152
- Aerin Sembhi, MDSeattle, WA 981071326330713
Common questions
What is Michael Eric Janssen, MD's NPI number?
Michael Eric Janssen, MD's National Provider Identifier (NPI) is 1194804161, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Eric Janssen, MD located?
The NPPES record lists a practice address at 5350 Tallman Ave NW, Seattle, WA, 98107. Phone: (206) 320-3335. Providers update this record themselves, so call before visiting.
How can I verify Michael Eric Janssen, MD's license?
NPPES lists Washington license number MD60344899, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Eric Janssen, MD prescribe under Medicare Part D?
In 2024, Michael Eric Janssen, MD had 6,023 Medicare Part D claims for 465 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.