H74.01Tympanosclerosis, right ear

H74.01 is the ICD-10-CM diagnosis code for Tympanosclerosis, right ear. It belongs to category H74 (other disorders of middle ear mastoid), block H65-H75 (diseases of middle ear and mastoid) and chapter 8 (diseases of the ear and mastoid process). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within H74.0 (Tympanosclerosis), H74.01 is specifically for Tympanosclerosis, right ear. Related codes cover left ear (H74.02), bilateral (H74.03) and unspecified ear (H74.09).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 385.00 (Tympanosclerosis, unspecified as to involvement), 385.01 (Tympanosclerosis involving tympanic membrane only), 385.02 (Tympanosclerosis involving tympanic membrane and ear ossicles) and 2 more.