About Us - Healthy People Team Members


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100% of our 2023 clients would recommend us to their peers.
100% of our 2023 clients said they had a good experience with our firm.


Our service area extends from Puerto Rico to Guam.

Katharine Iskrant, MPH, CPHQ, CHCA
Practice Leader

Katharine is the practice leader for our firm. She is a member of the NCQA Audit Methodology Panel. Katharine has been a Certified HEDIS® Compliance Auditor since 1998 and has directed more than one thousand HEDIS® audits.

Katharine is a frequent speaker at HEDIS® vendor and health plan conferences. She received her BA from Columbia University and her MPH from UC Berkeley School of Public Health. She is a member of the National Association for Healthcare Quality and is published in the fields of healthcare and public health.

Joan Spiegler, CPC, CPHQ, CHCA
Director, MA/MA-PD Reviews and Data Validation

Joan Spiegler has been with Healthy People since 2010 and is our Data Validation Director. Joan is also one of our NCQA Certified HEDIS Compliance Auditors, assisting health plans with her strong health plan background. Joan is a MA/MA-PD Claims Expert with 20 years experience in Medicare Managed Care. In her previous job at Kaiser Foundation Health Plan, she was a subject matter expert in MA/MA-PD claims, enrollment, and disenrollment, and assessed all related company policies and procedures to ensure process compliance with federal regulations. Joan was responsible for review and submission of the Part C and Part D quarterly claims data to CMS.

Joan strategically administered CMS Risk Adjustment Data Validation audits at KFHP. Joan played a pivotal role as compliance partner on IT projects and was liaison to Federal Government regulators. She successfully translated complex CMS regulations to operational processes working with cross-functional teams. Joan also ensured conformity with CMS regulatory requirements in designing, formulating and implementing multiple automated monitoring tools based on current business and systems processes. She has extensive experience reviewing Medicare claims and medical records data.

James Deich, PhD
Source Code Review Director

Dr. Deich directs the HEDIS source code review team. Dr. Deich is proficient at many programming languages and is an information systems and database systems testing expert.

Wendell Hicken, CISO
Chief Information Security Officer

Wendell Hicken is Chief Information Security Officer and is responsible for ensuring our data, assets and technologies are properly protected. He graduated from the California Institute of Technology with a B.S. in Engineering and Applied Science, has published a book on web application testing, and holds numerous patents. He’s worked as Chief Technology Officer at both small and large organizations, giving him a broad range of experience. Most recently he was Chief Technology Officer for Yellowpages.com, with over 60 million visitors per month. His responsibilities included overseeing security, IT compliance and protecting PII and other sensitive data.

Duke A. Phan, MD
Medical Director

Dr. Phan is our medical director and has a private practice in California. The audit team and nurse review team directly report to Dr. Phan on all medical questions.