Clarify Medical is now Zerigo Health.

Designed by patients
for patients

Zerigo Health was founded by a psoriasis patient, Martyn Gross, who had excellent results with UVB therapy but found it very difficult to receive in-office treatment three times a week. His concept of a mobile, easy-to-use home UVB system, linked with the patient's physician, inspired years of research and development with hundreds of psoriasis and vitiligo patients and their physicians. Patients designed the integrated technology and service solution we offer today.

The Zerigo Health Management Team

Our team of physicians, engineers, software experts, patient advisors and scientists are dedicated to creating new products and services that support patients and the clinicians who care for them.

John Schellhorn

President & CEO

John is a 25+ year veteran of the medical device industry with extensive experience in the commercialization of innovative medical technologies. He has successfully managed and built functions ranging from domestic and international sales force management, clinical, regulatory, global marketing, new market development, manufacturing and joint venture agreements. He joined GKC in 2017 as President, CEO and Board Director with a proven track record to spearhead the company’s accelerated growth strategy to meet the demand for its lead product, the Personal KinetiGraph™ (PKG™) system (Parkinson’s KinetiGraph™ system outside of the U.S.).

Before becoming President and CEO of GKC, he served as President and CEO of Monteris Medical Corporation where he oversaw development to commercialization of their MRI guided robotically controlled laser surgical system. Under his leadership, 30 new products were launched with 8 major software releases. Additionally, he raised $61M in equity financing and doubled sales annually between 2012-2015.

Previous to Monteris, John served as the Chief Commercialization Officer for BÂRRX Medical where he led major expansion of US and International selling & marketing organizations; achieving greater than $40M annual revenue before its acquisition by Covidien for $430M. As President and CEO of Softscope Medical Technologies Inc., he led this clinical stage VC backed company in the GI space that was later acquired by Fujifilm Japan.

Earlier in his industry career, John held positions as Vice President of Sales and Marketing for the Peripheral Vascular Division of ev3 Inc., Vice President and General Manager International for ACMI Corporation, and various management positions within Boston Scientific. Prior to his commercial career, he served 7 years as a U.S. Marine Corps pilot.

Teddy Fulham

VP, Finance/BD
Teddy has been working in the medical device and health information technology sectors for the past ten years. Prior to joining Zerigo Health in 2016, Teddy was responsible for Strategy and Product Management at Sotera Wireless, an early pioneer in the wearable continuous vital sign monitoring space, where he launched its next-generation software platform. Before Sotera, Teddy was a Market Manager for Pyxis Medication Management Technologies, which was acquired as part of Becton Dickinson’s acquisition of CareFusion in 2015. In this role, he established Pyxis’ competitive intelligence program and was a key member of the team which established its healthcare economics and outcomes research program. Earlier in his career, he graduated from CareFusion’s three-year Finance Leadership Development Program, in which he held roles in corporate finance, accounting and business unit financial planning & analysis. Teddy graduated magna cum laude with a B.S. in Finance (Honors Program) from the University of San Diego, where he also played Division 1AA football and received the USD Presidential Scholar Athlete Award.

Ann Deren-Lewis

SVP, Corporate Development & Physician Relations

Ann Deren-Lewis is a dynamic, diversified and top performing executive with experience in marketing, sales, public relations, business development, product/clinical development, professional and consumer targeted campaigns. She also has a proven track record in marketing in pharmaceutical and medical devices in these key therapeutic areas: aesthetics, cosmeceuticals (beauty brands), medical dermatology, and consumer products. Deren-Lewis has led diverse teams to accomplish more with less, while fostering innovative thinking and problem-solving. A recognized leader for data-driven performance improvement, she has successfully led many revitalizations and launches. She is keen at identifying current and emerging customer needs, translating those needs into marketing requirements, and cultivating marketing penetration, market segmentation and new product introduction strategies. She has created cross functional strategic plans and budgets that take into account medical education, product positioning, messaging, regional sales, pricing, contracting, competitive responses, customer support and educational/support services. Her passion is developing relationships with influential thought leaders in order to gain insight into market and product opportunities while managing utilization across studies, consulting, training, publications and public relations. Deren-Lewis holds an MBA from Duke University, Fuqua School of Business and a bachelor of science degree in accounting from the University of North Carolina-Wilmington.

Linda Kotcher

VP, Market Access & Reimbursement

Ms. Kotcher brings to Zerigo Health over 25 years of healthcare experience in the medical device field with a focus on managed care contracting, provider relations, reimbursement, healthcare policy, and health economics. Most recently, she served as Senior Director, U.S. Market Access and Reimbursement for Hearflow, and previously worked in market access leadership roles at iRhythm, CardioDx, Pathworks Diagnostics, and Dexcom.




What is Phototherapy? Phototherapy – Ultraviolet (UV) Light Therapy Light therapy, also known as phototherapy, is the use of ultraviolet (UV) light for its healing effects. Phototherapy has been used worldwide for nearly a century to treat chronic skin conditions such as psoriasis, vitiligo and severe eczema. While many treatments decrease the overall immune system,….

Patient Spotlight: Q&A with Mom


When it comes to managing chronic skin conditions, all successes are worth celebrating – small and large. We wanted to take this time to recognize one of our patients who has seen incredible results using the Zerigo Health System in a short period of time. Since this patient is only 8 years old, we asked….

Contact Us.
We’re here to help.

Zerigo Health
10505 Sorrento Valley Rd. Suite 450
San Diego, CA 92121

Corporate / General Support: +1 (877) 520-5697
Sales Support: +1 (877) 738-6041
Fax: +1 (844) 562-6896

We are committed to providing innovative technology and support services for people with chronic skin conditions. We welcome your feedback and invite your questions.

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