Patrick M. Lassen, M.D.
Urology Physician · Longview, WA
Patrick M. Lassen, M.D. is a urology physician with a practice address in Longview, Washington, and NPI 1285632919, issued on Jul 7, 2005. Check the license (Washington MD000037114, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Patrick M. Lassen
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- MD000037114 WA
Self-reported in NPPES; status is on the state search - Practice location
- 625 9TH Ave, Longview, WA 98632
- Phone
- (360) 636-8950
- Enumerated
- Jul 7, 2005
- Record last updated
- Mar 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (360) 636-8951
- Medicaid ID
- 8239790 WA
- Medicare enrollment
- Enrolled (PECOS I20251121003383); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest urology physician records → All 335 in Washington → Look up another NPI →
Also registered at 625 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bruce Blackstone, M.D.Orthopaedic Surgery Physician1891760211
- Chad Chesley, M.D.Urology Physician1831197243
- Brittney Higa, P.T., D.P.T.Orthopedic Physical Therapist1356640312
- Jon Kretzler, M.D.Orthopaedic Surgery Physician1417922840
- Tony Lin, M.D.Orthopaedic Surgery Physician1043414741
Verify Patrick M. Lassen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD000037114Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% more Medicare Part D claims than the average urology physician in 2024
1,750 Medicare Part D claims for 504 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 82 claims were for opioids.
Most prescribed
- Tamsulosin Hcl564 claims
- Finasteride451 claims
- Oxybutynin Chloride Er242 claims
- Hydrocodone-Acetaminophen69 claims
- Ciprofloxacin Hcl60 claims
- Alfuzosin Hcl Er47 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 one group practice
- Salem HealthSalem, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick M. Lassen among 335 urology physician records in Washington
Patrick M. Lassen, M.D. is one of 335 urology 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1990 · median 2005 among the 224 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Washington
There are 335 urology physician records in Washington.
All 335 in Washington → Every provider in Longview → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Chad Chesley, M.D.Longview, WA 986321831197243
- Patrick Maginn, MDLongview, WA 986321063410512
- Alan Bickel, M.D.Vancouver, WA 986641689679144
- George Dechet, M.D.Vancouver, WA 986641508840620
- Erin Gibbons, M.D.Vancouver, WA 986641063647816
- Michael Lin-Brande, MDVancouver, WA 986641275095085
- Jason Smith, M.D.Vancouver, WA 986641538376405
- Rohan Vaidya, M.D.Vancouver, WA 986641679014518
Common questions
What is Patrick M. Lassen, M.D.'s NPI number?
Patrick M. Lassen, M.D.'s National Provider Identifier (NPI) is 1285632919, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Patrick M. Lassen, M.D. located?
The NPPES record lists a practice address at 625 9TH Ave, Longview, WA, 98632. Phone: (360) 636-8950. Providers update this record themselves, so call before visiting.
How can I verify Patrick M. Lassen, M.D.'s license?
NPPES lists Washington license number MD000037114, 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 M. Lassen, M.D. prescribe under Medicare Part D?
In 2024, Patrick M. Lassen, M.D. had 1,750 Medicare Part D claims for 504 beneficiaries; the average among urology physician prescribers was 1,340. 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.