Site Feedback

Title 21

Displaying title 21, up to date as of 7/16/2026. Title 21 was last amended 7/09/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 21Food and DrugsPart / Section
Chapter IFood and Drug Administration, Department of Health and Human Services1 – 1299
Subchapter HMedical Devices800 – 898
Part 874Ear, Nose, and Throat Devices874.1 – 874.6000
Subpart DProsthetic Devices874.3300 – 874.3950
§ 874.3300Air-conduction hearing aid.
§ 874.3302Bone-conduction hearing aid.
§ 874.3305Wireless air-conduction hearing aid.
§ 874.3310Hearing aid calibrator and analysis system.
§ 874.3315Tympanic membrane contact hearing aid.
§ 874.3320Group hearing aid or group auditory trainer.
§ 874.3325Self-fitting air-conduction hearing aid.
§ 874.3330Master hearing aid.
§ 874.3340Active implantable bone conduction hearing system.
§ 874.3375Battery-powered artificial larynx.
§ 874.3400Tinnitus masker.
§ 874.3410Combined acoustic and electrical external stimulation device for the relief of tinnitus.
§ 874.3430Middle ear mold.
§ 874.3450Partial ossicular replacement prosthesis.
§ 874.3495Total ossicular replacement prosthesis.
§ 874.3540Prosthesis modification instrument for ossicular replacement surgery.
§ 874.3620Ear, nose, and throat synthetic polymer material.
§ 874.3695Mandibular implant facial prosthesis.
§ 874.3730Laryngeal prosthesis (Taub design).
§ 874.3760Sacculotomy tack (Cody tack)
§ 874.3820Endolymphatic shunt.
§ 874.3850Endolymphatic shunt tube with valve.
§ 874.3880Tympanostomy tube.
§ 874.3900Nasal dilator.
§ 874.3930Tympanostomy tube with semipermeable membrane.
§ 874.3950Transcutaneous air conduction hearing aid system.