Michael Shane Siem, PA-C
Physician Assistant · Bellevue, WA
Michael Shane Siem, PA-C is a physician assistant with a practice address in Bellevue, Washington, and NPI 1245483569, issued on Oct 30, 2008. Check the license (Washington PA60056591, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michael Shane Siem
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA60056591 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1035 116TH Ave NE, Bellevue, WA 98004
- Phone
- (425) 688-5573
- Enumerated
- Oct 30, 2008
- Record last updated
- Dec 10, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (425) 688-5464
- Medicaid ID
- 2011887 WA
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,718 in Washington → Look up another NPI →
Also registered at 1035 116TH Ave NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Shane Siem in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license PA60056591Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average physician assistant in 2024
20 Medicare Part D claims, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Michael Shane Siem among 3,718 physician assistant records in Washington
Michael Shane Siem, PA-C is one of 3,718 physician assistant records with a practice address in Washington. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 27% of them.
- NPI issued2008 · 27% of these records are older, 70% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2020 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
83 physician assistant records list a practice address in Bellevue
They are 83 of the 6,738 NPPES records with a practice address in Bellevue, and 3,718 physician assistant records in Washington.
All 3,718 in Washington → Every provider in Bellevue → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Susan Duffy, PA-CBellevue, WA 980041376617175
- Matthew Gambone, PABellevue, WA 980041104869478
- Dror Holzman, P.A.Bellevue, WA 980041144277120
- Tara Hook, PA-CBellevue, WA 980041245211150
- Paula Lins, P.A.-CBellevue, WA 980041013933423
- Robin Moore, PACBellevue, WA 980041174692347
- Amy Morgan, PA, LMBellevue, WA 980041649209131
- Karin Pedersen, P.A-CBellevue, WA 980041457369951
Common questions
What is Michael Shane Siem, PA-C's NPI number?
Michael Shane Siem, PA-C's National Provider Identifier (NPI) is 1245483569, issued on Oct 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Michael Shane Siem, PA-C located?
The NPPES record lists a practice address at 1035 116TH Ave NE, Bellevue, WA, 98004. Phone: (425) 688-5573. Providers update this record themselves, so call before visiting.
How can I verify Michael Shane Siem, PA-C's license?
NPPES lists Washington license number PA60056591, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Michael Shane Siem, PA-C prescribe under Medicare Part D?
In 2024, Michael Shane Siem, PA-C had 20 Medicare Part D claims; the average among physician assistant prescribers was 830. 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.