Alphabetic Index FY2027

H75.0

Mastoiditis in infectious and parasitic diseases classified elsewhere

FY2027Chapter 8: Diseases of the ear and mastoid process/H65–H75 Diseases of middle ear and mastoid

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

H75.0 is a non-billable ICD-10-CM code header for mastoiditis in infectious and parasitic diseases classified elsewhere. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are H75.00 Mastoiditis in infectious and parasitic diseases classified elsewhere, unspecified ear; H75.01 Mastoiditis in infectious and parasitic diseases classified elsewhere, right ear; H75.02 Mastoiditis in infectious and parasitic diseases classified elsewhere, left ear and H75.03 Mastoiditis in infectious and parasitic diseases classified elsewhere, bilateral. Its coding notes include a Code first instruction, 3 Excludes1 entries and 8 Excludes2 entries.

Code first

If the underlying condition listed here is present and known, sequence it first.

Inherited from H75 Other disorders of middle ear and mastoid in diseases classified elsewhere
  • underlying disease

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code

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

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 2 entries

More specific codes under H75.0 4