The physicians and staff of Western Nephrology operate with integrity and compassion and value our relationships with patients, health partners and community. We practice medicine in the most comprehensive, evidence-based approach possible. Through collaboration, integration, innovation, and use of technology we maintain our position at the forefront of evolving healthcare delivery models that improve quality of life, outcomes and cost.

Click on a photo to read the provider’s bio:

Arvada Office

Harmeet Singh

Harmeet Singh, MD

Claudia van Dijk, MD

Rajesh Yalavarthy

Rajesh Yalavarthy, MD

Dr.-Montague

Terri Montague, MD

Daniel Andreoli

Daniel Andreoli, MD

Huberty,-Connie-v2

Connie Huberty, ANP-BC


Emily Kaufman, NP


Chris Moore, NP

Frederick Office

Dr. Abdallah

Joseph G. Abdallah, MD

Yana Kennedy

Yana Kennedy, NP

Lafayette Office

Richard K. Halterman

Richard K. Halterman, MD

Steven W. Kraft

Steven W. Kraft, MD

Jennie Feiger, PA-C

AJ Ostrom, NP

Judith Berg, NP

Lakewood Office

Geraldine Corrigan

Geraldine Corrigan, MD

Claudia van Dijk, MD

Suzie DeMore

Suzie DeMore, FNP-C

Ian Villanueva, DNP

Longmont Office

Adil Jadoon, MD

Sarah Remington, PA-C

Michael Bregenzer, NP

Westminster Office

Dr. Esson

Matthew L. Esson, MD

Dr. Levey

Seth A. Levey, MD

Dr. Abdallah

Joseph G. Abdallah, MD

Katherine Akers

Katherine Akers, MD

Yana Kennedy

Yana Kennedy, NP

Rebekah Dennis, NP

Wendy Dennis, NP