Otosclerosis is rated by the U.S. Department of Veterans Affairs under DC 6202 of 38 CFR § 4.87, DC 6202 across 4 severity tiers (0% / 10% / 20% / 30%). Service connection requires (1) a current diagnosis, (2) an in-service event, injury, or exposure, and (3) a medical nexus opinion linking the two under 38 C.F.R. § 3.303.
Abnormal bone remodeling in the middle ear, particularly affecting the stapes bone, leading to fixation and progressive conductive hearing loss. May also cause sensorineural hearing loss if the cochlea is involved (cochlear otosclerosis).
Rating criteria reference 38 C.F.R. Part 4 (Schedule for Rating Disabilities). This entry has not yet undergone editorial review against the live regulation text — consult the authoritative source directly before relying on the criteria shown.