Peter Lennarson, MD
Associate Professor of Clinical Practice, Neurosurgery

Medical School:
  • MD, University of Wisconsin School of Medicine and Public Health (1995)
Undergraduate School:
  • BS, University of Wisconsin–Madison (WI) (1991)
  • University of Iowa Hospitals and Clinics Program (1996)
  • University of Iowa Hospitals and Clinics Program, Chief Resident, Neurosurgery (2001)
Languages: English, Spanish
Department: Neurosurgery

Professional Titles

  • Associate Professor


  • Callen AL, Timpone VM, Schwertner, A, Zander D, Grassia, F, Lennarson P, Seinfeld J, Lillehei K, Birlea M, Thaker AA: Algorithmic, Multimodality Approach to Diagnosis and Treatment of Spinal CSF Leak and Venous Fistula in Spontaneous Intracranial Hypotension, American Journal of Roentgenology, In press

Professional Memberships

  • American Association of Neurological Surgeons, Fellow
  • Congress of Neurological Surgeons, Member
  • Colorado Medical Society, Member
  • Colorado Neurosurgical Society, Member
  • Denver Medical Society, Member

Practice Locations

UCHealth Spine Center - Anschutz Medical Campus
Anschutz Inpatient Pavilion - 1st Floor
12605 E. 16th Avenue
Aurora, CO 80045

CU Sports Medicine and Performance Center
2150 Stadium Drive
2nd Floor
Boulder, CO 80309

UCHealth University of Colorado Hospital Trauma Center
12505 E. 16th Avenue
Anschutz Inpatient Pavilion 2, First floor
Aurora, CO 80045

Hospital Affiliation
  • University of Colorado Hospital
  • Denver Health Medical Center

Specialty Information

  • Neurological Surgery, Board Certification (2006)
Conditions & Treatments
  • Bones, Joints and Muscles - Spine Injuries
  • Bones, Joints and Muscles
  • Bones, Joints and Muscles - Scoliosis
  • Bones, Joints and Muscles - Neck Disorders and Injuries
  • Bones, Joints and Muscles - Back Pain
  • Bones, Joints and Muscles - Carpal Tunnel Syndrome
  • Brain and Nervous System - Traumatic and Acquired Brain Injuries
  • Brain and Nervous System
  • Brain and Nervous System - Trauma / Nerve Injuries
  • Brain and Nervous System - Spine Diseases and Conditions
  • Spine
  • Spine - Cervical disc herniation
  • Spine - Cervical spinal stenosis
  • Spine - Degenerative Disc Disease
  • Spine - Degenerative Scoliosis
  • Spine - Lumbar disc herniation
  • Spine - Lumbar spinal stenosis
  • Spine - Myelopathy
  • Spine - Radiculopathy
  • Spine - Sciatica
  • Spine - Scoliosis
  • Spine - Slipped Disc
  • Spine - Spondylolisthesis
  • Spine - Spondylolysis
  • Spinal Deformity
  • Surgery - Neurosurgery
  • Surgery
Clinical Interests
Degenerative and traumatic spinal disorders--from the base of the skull down to the neck and back as well as the tail bone and sacro-iliac joints. Cranio-vertebral junction disorders. (Arnold) Chiari Malformation. Carpal tunnel syndrome and Ulnar neuropathy. Minimal Access / minimally invasive surgical techniques.

Care Philosophy
While having practiced the full breadth of neurosurgery my work has increasingly focused on the many complicated spine problems that so many suffer from. From outpatient, minimally invasive surgeries to large complex deformity operations there is no problem too little nor too great that does not interest me. Even as a surgeon, it is still my hope to help you in non-surgical ways when possible, but I will be committed to developing whatever plan is required to solve your problems. I place great emphasis on helping you understand your problem in straight forward terms. I will respect you as a partner in maintaining your health and will listen and seek to understand your questions and concerns so that we can work together to make treatment plans that meet your needs.

Personal Interests
I have a passion for my work and continue to study and learn the science and art of neurosurgery and spine surgery even outside the traditional work environment. I am often engrossed in contemplating a new treatment or surgical procedure and figuring out how I can adopt it to better the lives of my patients. Outside of my profession I enjoy the Colorado outdoors including hiking, trail running, biking, skiing, fishing and camping. Best of all is when I can combine these activities with my wife and 5 boys.

General Information

Medical Schools:
  • MD, University of Wisconsin School of Medicine and Public Health (1995)
Undergraduate Schools:
  • BS, University of Wisconsin–Madison (WI) (1991)
  • University of Iowa Hospitals and Clinics Program (1996)
Residency Programs:
  • University of Iowa Hospitals and Clinics Program, Chief Resident, Neurosurgery (2001)
Languages: English, Spanish
Department: Neurosurgery
Contact Us
CU Anschutz
Fitzsimons Building

13001 East 17th Place
Campus Box C290
Aurora, CO 80045

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