Summary

Dr. Patrick Lassen is a urologist with 36 years of experience treating patients throughout southwestern Washington. He earned his medical degree from Oregon Health & Science University School of Medicine and has dedicated his career to helping patients with urological conditions. Dr. Lassen speaks English and brings more than three decades of expertise to his practice.

Dr. Lassen practices at multiple locations including Longview and Vancouver, Washington, with hospital affiliations that include Saint John Medical Center, Salem Health Salem Hospital, and Legacy Salmon Creek Medical Center. He specializes in treating kidney stones and complex stone formations that require specialized care. His practice also includes diagnostic imaging procedures such as chest X-rays and fluoroscopy to help diagnose patient conditions. Patients have given Dr. Lassen an average rating of 4.0 on Vitals.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4
  • 36 years of experience
  • speaks English
  • Oregon Health & Science University School Of Medicine
  • 4 written reviews
  • 1 specialty
  • 7 areas of expertise
  • 7 hospital affiliations
  • 5 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Patrick Mark Lassen has 5 locations

Peacehealth Longview Urology Clinic Pllc

625 9th Ave Ste 120Longview, WA 98632
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 4:00 pm
SatClosed
SunClosed

Legacy Salmon Creek Medical Center

2211 Ne 139th StVancouver, WA 98686

Ocean Beach Hospital And Medical Clinics

174 1st Ave NIlwaco, WA 98624

Saint John Medical Center

1615 Delaware StLongview, WA 98632

Peacehealth Southwest Medical Center

400 Ne Mother Joseph PlVancouver, WA 98664

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Dr. Patrick Mark Lassen, MD
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Dr. Patrick Mark Lassen, MDDr. Alan BickelDr. Ronald Douglas Im, MDChad C. Chesley, MD
UrologyUrologyUrologyUrology
Accepts New Patients Accepts New Patients Accepts New Patients
4.8 
36 Years of Experience 22 Years of Experience 32 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English
Longview , WALongview , WAHillsboro , ORLongview , WA
Med School: Oregon Health & Science University School Of Medicine Med School: Loma Linda University School Of Medicine Med School: St Louis University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Patrick Mark Lassen

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Patrick Mark Lassen has the following specialty

Specialty Expertise

Dr. Patrick Mark Lassen has the following 7 areas of expertise

  • Bladder Issues
  • Erectile Dysfunction (ED)
  • Kidney Stones
  • Overactive Urinary Bladder
  • Prostate Cancer
  • Prostatitis
  • Urologic Emergencies

Certifications, License, & Education

36 Years Experience

Dr. Patrick Mark Lassen holds an expired medical license in the state of Washington.

Medical License

Medical Doctor with an expired medical license in the state of Washington that expired in 2025.

Education & Training

Medical School

Graduated from Oregon Health & Science University School Of Medicine in 1990.

NPI Number

Dr. Lassen's NPI number is 1285632919.

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Frequently Asked Questions

Does Dr. Patrick Lassen accept virtual/telehealth appointments?
Dr. Patrick Lassen has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is Dr. Patrick Lassen affiliated with?
Dr. Patrick Lassen is affiliated with Saint John Medical Center, Salem Health Salem Hospital, Peacehealth Southwest Medical Center, West Valley Hospital, Ocean Beach Hospital And Medical Clinics, Summit Healthcare Regional Medical Center, and Legacy Salmon Creek Medical Center.
How can I make an appointment with Dr. Patrick Lassen?
You can find contact information for Dr. Patrick Lassen here on Vitals.
Where is Dr. Patrick Lassen's office located?
Dr. Patrick Lassen's office is located at 625 9th Ave Ste 120, Longview, WA, 98632.
What languages does Dr. Patrick Lassen speak?
Dr. Patrick Lassen speaks English.

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