H74.91
Unspecified disorder of right middle ear and mastoid
BillableComplete code, valid to report
H74.91 (also written H7491) is a billable ICD-10-CM diagnosis code for unspecified disorder of right middle ear and mastoid. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 36 codes in category H74 (Other disorders of middle ear mastoid). Its coding notes include 9 Excludes2 entries.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 8 Diseases of the ear and mastoid process
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Notes
Also from chapter/block level (1 note)
Inherited from Chapter 8 Diseases of the ear and mastoid process
- Use an external cause code following the code for the ear condition, if applicable, to identify the cause of the ear condition