Diamond Pharmacy Services



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About Diamond Pharmacy Joanne, Gib, and Mark Zilner

Diamond Pharmacy Services is the nations largest correctional pharmacy services provider and Pennsylvania's largest independently owned nursing facility pharmacy services provider. Diamond has specialized in patient-specific services for correctional facilities for over 23 years.

Our family owned business has experienced a great deal of growth since it's beginning as a single retail pharmacy which Gib Zilner R.Ph., P.D. purchased in 1970. We now operate a 135,000 square foot, state-of-the-art automated closed-door institutional pharmacy, IV infusion facility, two retail pharmacies, and a medical supply facility all located in Indiana, PA.

Gib's wife, Joan Zilner R.Ph., joined the business full-time in 1985. Working together, Gib and Joan created a successful business with a strong emphasis on providing customers with personal attention. Mark Zilner R.Ph. joined the business in 1991 after earning his pharmacy degree. Mark's new perspective and energy helped to improve, add, and enhance features to enable for large expansion. This fusion of the generations has created a unique situation in which customers find the latest technology, combined with "old-fashioned" service and hard work.

We strived to maintain excellent customer service throughout our growth process. We made the decision to locate our operations in one large facility rather than spreading it out into multiple locations. This has allowed our family owned and managed business to provide customers with personal attention, dependability, and promptness. Additionally, by working closely with our employees, we have established tremendous employee loyalty, helping to improve the quality of customer service.

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