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Office
4743 Arapahoe Ave
Ste 104
Boulder, CO 80303Phone+1 303-444-9000Fax+1 303-444-9073
Education & Training
Cleveland Clinic FoundationResidency, Urology, 2003 - 2009
Loyola University Chicago Stritch School of MedicineClass of 2003
Certifications & Licensure
CO State Medical License 2010 - 2025
OH State Medical License 2003 - 2010- American Board of Urology Urology
Publications & Presentations
PubMed
- 95 citationsSafety and efficacy of flexible ureterorenoscopy and holmium:YAG lithotripsy for intrarenal stones in anticoagulated cases.Burak Turna, Robert J. Stein, Marc C. Smaldone, Bruno Santos, John C. Kefer
The Journal of Urology. 2008-04-01 - 25 citationsSafety and Efficacy of Percutaneous Nephrostolithotomy in Patients on Anticoagulant TherapyJohn C. Kefer, Burak Turna, Robert J. Stein, Mihir M. Desai
The Journal of Urology. 2009-01-01 - 136 citationsRole of antioxidants in the treatment of male infertilityJohn C. Kefer, Ashok Agarwal, Edmund Sabanegh
International Journal of Urology. 2009-05-01
Press Mentions
Colorado Urology Announces Dr. John C. Kefer's Designation as A UroLift® Center of ExcellenceJune 11th, 2019
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