HILLARY P. THOMASSER (MD) – Emergency Medicine Physician, NPI 1083670905

HILLARY P. THOMASSER (MD) is a healthcare provider. based in Lake stevens, Washington. specializing in Emergency Medicine Physician. They hold the professional credentials MD. They hold a License No. MD00031211 (WA). The NPI Number for HILLARY P. THOMASSER (MD) is 1083670905

Main info

Female
37 Years Of Experience
Accepts Medicare Assignment
Name
HILLARY P. THOMASSER (MD)
NPI
1083670905
Phone
Not provided
Address
11901 125TH AVE NE
Enumeration Date
21 April 2006
Last Update Date
29 April 2010

Doctor Profile

Medical School Name
OTHER
Secondary Phone
3606582488
Graduation Year
1989 (37 years ago)
PAC ID
5092843326
Group Practice PAC ID
4284521691
Professional Enrollment ID
I20100507000125
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience59
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for HILLARY P. THOMASSER (MD)

  • 125th Avenue Northeast, Lake Stevens, Snohomish County, Washington, 98258, United States

    LAKE STEVENS, WA 982588309

    Phone:

    Type: Mailing

  • Swedish First Hill Medical Center, 747, Broadway, First Hill, Seattle, King County, Washington, 98122, United States

    SEATTLE, WA 981224379

    Phone: (206) 386-6000

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 98258)

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Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 4284521691View full group profile
NameSpecialtyState
Emergency MedicineWA
Emergency MedicineWA
-IL
Emergency MedicineCA
Emergency MedicineWA
Emergency MedicineIL
Emergency MedicineCO
-CA
Emergency MedicineWA
Emergency MedicineMD

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Frequently asked questions

What is HILLARY P. THOMASSER (MD)'s NPI number?
HILLARY P. THOMASSER (MD)'s NPI is 1083670905 — the number used across U.S. healthcare to identify this provider.
Would HILLARY P. THOMASSER (MD) appear as active to a payer?
You can treat HILLARY P. THOMASSER (MD) as active for directory purposes; confirm clinical privileges separately.
What clinical focus is listed for HILLARY P. THOMASSER (MD)?
At a glance, HILLARY P. THOMASSER (MD) is tied to Emergency Medicine Physician. Clinical services aligned with this taxonomy classification.
Where in Washington is HILLARY P. THOMASSER (MD) registered?
Use Lake Stevens, Washington as the headline location for HILLARY P. THOMASSER (MD) here.
Can I trust this NPI listing for HILLARY P. THOMASSER (MD)?
The listing is sourced from the national NPI registry. If something looks off, compare with NPPES and the clinic's website.

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