The brief descriptions below are designed to familiarize you with our physician's training, professional credentials and work experience.
Collin Pehde, DPM
Education
- DPM, Des Moines University - College of Podiatric Medicine and Surgery, Des Moines, IA
Residency
- Podiatric Medicine and Surgery, Western Pennsylvania Hospital, Pittsburgh, PA
- Podiatric Medicine and Surgery, West Houston Medical Center, Houston, TX
Certification
- Board-certified, Foot Surgery, American Board of Podiatric Surgeons
- Board-certified, Reconstructive Rearfoot/Ankle Surgery, American Board of Podiatric Surgeons
Licensure
- State of Nebraska
- State of Iowa
Membership
- American Podiatric Medical Association
- American College of Foot and Ankle Surgeons
- Nebraska Podiatric Medical Association
Office Locations
- Council Bluffs
- Clarinda
- Ohio
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Patrick J. Nelson, DPM
Education
- DPM, Des Moines University - College of Podiatric Medicine and Surgery
- BS, University of Nebraska Omaha
Residency
- Podiatric Surgery: St. Vincent Charity Medical Center, Cleveland, OH
Certification
- Board-certified, Podiatric Medicine, American Board of Podiatric Medicine
Licensure
- State of Nebraska
- State of Iowa
- State of Ohio (inactive)
Membership
- American Society of Podiatric Surgeons
- American College of Foot and Ankle Surgeons
- American Podiatric Medical Association
- Nebraska Podiatric Medical Association
- Des Moines University Alumni Association
- Des Moines University Alumni Mentor
Office Locations
- Ohio
- La Vista
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Nicholas Olari, DPM
Education
- DPM: Ohio College of Podiatric Medicine, Cleveland, OH
- BS: University of Oklahoma, Norman OK
Residency
- Podiatric Surgery: Greater Omaha Podiatric Residency, Omaha, NE
Board Certification
-
Board-certified, Foot and Ankle Surgery, American Board of Podiatric Surgeons
Licensure
- State of Nebraska
Membership
- American Podiatric Medical Association
- Nebraska Podiatric Medical Association
- American College of Foot and Ankle Surgeons
Office Locations
- Grover
- La Vista
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Jordan Sikes, DPM
Education
- DPM: Rosalind Franklin University of Medicine and Science
Residency
- Podiatric Surgery: Truman Medical Center, Kansas City, MO
Certification
- Board-certified, Podiatric Medicine, American Board of Podiatric Medicine
Licensure
- State of Nebraska
- State of Missouri (inactive)
Membership
- American Podiatric Medical Association
- Nebraska Podiatric Medical Association
- American College of Foot and Ankle Surgeons
Office Locations
- Grover
- La Vista
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Robert Greenhagen, DPM
Education
DPM, Des Moines University - College of Podiatric Medicine and Surgery, Des Moines, IA- BS, Briar Cliff University, Sioux City, IA
Residency
- Podiatric Surgery: University of Pittsburgh Medical Center, Pittsburgh, PA
Fellowship
- Dermatopathology, Bako Podiatric Pathology Services, Alpharetta, GA
Certification
- Board-certified, Foot Surgery, American Board of Podiatric Surgeons
- Board-certified, Reconstructive Rearfoot/Ankle Surgery, American Board of Podiatric Surgeons
- Board-certified, Podiatric Medicine, American Board of Podiatric Medicine
- CAQ in Amputation Prevention and Wound Care, American Board of Podiatric Medicine
Licensure
- State of Nebraska
- State of Iowa
- Commonwealth of Pennsylvania (inactive)
Membership
- American Society of Podiatric Surgeons
- American College of Foot and Ankle Surgeons
- American Podiatric Medical Association
- Nebraska Podiatric Medical Association
- Des Moines University Alumni Association
- Des Moines University Alumni Mentor
- Nebraska Diabetes Advisory Committee
- Nebraska Diabetes Consensus Guidelines Taskforce
Office Locations
- Ohio
Publications and Presentations
Dr. Greenhagen has published numerous peer-reviewed articles, reviews, and chapters. He is the current president of the Nebraska Podiatric Medical Association and Education chair for the American Society of Podiatric Surgeons. He also has lectured both at regional and national conferences. For a full listing of his publications and lectures please refer to his full CV below.
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John Lazoritz, DPM 
Education
- DPM, Des Moines University - College of Podiatric Medicine and Surgery, Des Moines, IA
- B.S. University of Nebraska at Lincoln, Lincoln, NE
Residency
- Podiatric Surgery: Detroit Medical Center, Detroit Michigan
Certification
- Board-certified, Podiatric Medicine, American Board of Podiatric Medicine
Licensure
- State of Nebraska
- State of Iowa
- State of Michigan (inactive)
Membership
- American Podiatric Medical Association
- American College of Foot and Ankle Surgeons
- Nebraska Podiatric Medical Association
Office Locations
- La Vista
- Ohio
- Clarinda
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Paul Dayton, DPM
Education
- DPM, California College of Podiatric Medicine, San Francisco
- B.S., Arizona State University
Residency
- Podiatric Surgery, Kaiser Permanente Hospital, Santa Clara California
Certification
- Board-certified, Foot Surgery, American Board of Podiatric Surgeons
- Board-certified, Reconstructive Rearfoot/Ankle Surgery, American Board of Podiatric Surgeons
Licensure
- State of Iowa
Membership
- American Podiatric Medical Association
- American College of Foot and Ankle Surgeons
- Iowa Podiatric Medical Association
Office Locations
- Ankeny
Publications and Presentations
Dr. Dayton has co-authored many peer-reviewed journal articles and book chapters and has presented numerous national and international lectures. As a partner with medical technology companies, Dr. Dayton has collaborated with foot and ankle surgeons across the country to develop innovative procedures and is named on several US medical device patents.
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Mindi Dayton, DPM
Education
- DPM, Des Moines University - College of Podiatric Medicine and Surgery, Des Moines, IA
- B.S., Buena Vista University, Storm Lake, IA
Residency
- Podiatric Surgery, Trinity Regional Medical Center, Fort Dodge, Iowa
Licensure
- State of Iowa
Membership
- American Podiatric Medical Association
- American College of Foot and Ankle Surgeons
- Iowa Podiatric Medical Association
- Des Moines University Alumni Association
- Des Moines University Alumni Mentor
Office Locations
- Ankeny
Publications and Presentations
Dr. Dayton has co-authored many peer-reviewed journal articles and book chapters and has presented numerous local and regional lectures. Drs. Mindi and Paul Dayton have earned several national awards for research posters and manuscripts they have completed together.