When hospitals and drug companies need help on Capitol Hill, McDermott Will & Emery partner Eric Zimmerman is often at the top of their list.

Known as an expert in Medicare, Zimmerman was involved in shaping half a dozen targeted provisions of the 2010 health care law, including Medicare reimbursement rates for rural hospitals and issues related to “personalized medicine” using genetic information for diagnosis and treatment. Though he described each provision as “fairly discrete,” the results he achieved were crucial to his clients. Among them: Genomic Health Inc., the Rural Referral Center/Sole Community Hospital Coalition, Diabetes Access to Care Coalition, Roche Diagnostics Corp. and Allergan Inc.

The bill has been law for a year, but Zimmerman said he doesn’t see any end to related work. “Looking ahead, it’s just the beginning, much like Medicare in 1965.”