David Kandzari, an Atlanta cardiologist, also has worked as a consultant to makers of medical devices. He received at least $100,000 from them in five years, according to corporate and government data.

Another organization he works with, the Food and Drug Administration, doesn’t appear to mind. In October, the FDA put Dr. Kandzari on a panel reviewing a medical device made by Boston Scientific Corp., one of the companies he has advised.

The FDA didn’t disclose the connection. It was among numerous financial ties the FDA hasn’t disclosed between medical-device makers and the doctors and other experts who review devices for it, a Wall Street Journal analysis of corporate, state and federal data shows.

In panels evaluating devices involved in cardiology, orthopedics and gynecology from 2012 through 2014, a third of 122 members had received compensation—such as money, research grants or travel and food—from medical-device companies, an examination of databases shows.

Nearly 10% of the FDA advisers received something of value from the specific company whose product they were evaluating.