Patrick Leroy Mathiasen, MD
Psychiatry Physician · Bellevue, WA
Patrick Leroy Mathiasen, MD is a psychiatry physician with a practice address in Bellevue, Washington, and NPI 1316962145, issued on Jul 13, 2006. Check the license (Washington MD00025427, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Patrick Leroy Mathiasen
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- MD00025427 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1035 116TH Ave NE, Bellevue, WA 98004
- Phone
- (206) 722-0594
- Enumerated
- Jul 13, 2006
- Record last updated
- May 30, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (206) 722-4484
- Medicaid ID
- 1056142 WA
- Medicare enrollment
- Enrolled (PECOS I20040405001603); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota, Duluth School Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,195 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.
- Stanley Abramski, MDPsychiatry Physician1245255181
- Shelley Agricola, MDAnesthesiology Physician1659328326
- Michael Ames, MDHospitalist Physician1255622643
- Christopher Andersen, MDHospitalist Physician1558371971
- Colin Andrews, MDAnesthesiology Physician1124482054
- Randall Baker, MDAnesthesiology Physician1942240528
Verify Patrick Leroy Mathiasen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00025427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average psychiatry physician in 2024
212 Medicare Part D claims for 34 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Trazodone Hcl29 claims
- Benztropine Mesylate22 claims
- Divalproex Sodium22 claims
- Risperidone15 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 93.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Bhc Fairfax Hospital IncEverett, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick Leroy Mathiasen among 1,195 psychiatry physician records in Washington
Patrick Leroy Mathiasen, MD is one of 1,195 psychiatry physician records with a practice address in Washington. 61% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 57% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 39% of these records are
- Graduated1985 · median 2007 among the 462 with a school on file
- Record last updated2013 · 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 2084P0800X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Washington
There are 1,195 psychiatry physician records in Washington.
All 1,195 in Washington → Every provider in Bellevue → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Stanley Abramski, MDBellevue, WA 980041245255181
- Santosh Agnani, MDBellevue, WA 980041134178882
- Christina Agustin, MDBellevue, WA 980041801823810
- Kristin Bernhart, MDBellevue, WA 980041881707966
- Gretchen Carlson, MDBellevue, WA 980041942319785
- Saul Helfing, MDBellevue, WA 980041841215787
- Kelan Koenig, MDBellevue, WA 980041689699035
- Marcus Nemuth, MDBellevue, WA 980041245337120
Common questions
What is Patrick Leroy Mathiasen, MD's NPI number?
Patrick Leroy Mathiasen, MD's National Provider Identifier (NPI) is 1316962145, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Patrick Leroy Mathiasen, MD located?
The NPPES record lists a practice address at 1035 116TH Ave NE, Bellevue, WA, 98004. Phone: (206) 722-0594. Providers update this record themselves, so call before visiting.
How can I verify Patrick Leroy Mathiasen, MD's license?
NPPES lists Washington license number MD00025427, 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 Patrick Leroy Mathiasen, MD prescribe under Medicare Part D?
In 2024, Patrick Leroy Mathiasen, MD had 212 Medicare Part D claims for 34 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Patrick Leroy Mathiasen, MD's MIPS final score?
The 2023 MIPS final score is 93.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.