CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER H—MEDICAL DEVICES (parts 800 to 898) > PART 814—PREMARKET APPROVAL OF MEDICAL DEVICES > SUBPART E—Postapproval Requirements (§814.80 to §814.84) > 814.80—General.