2017/18 ICD-10-CM Diagnosis Code H70.1

Chronic mastoiditis

Applicable To
  • Caries of mastoid
  • Fistula of mastoid
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as H70.1. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • tuberculous mastoiditis (
    ICD-10-CM Diagnosis Code A18.03

    Tuberculosis of other bones

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Tuberculous mastoiditis
    • Tuberculous osteomyelitis
    A18.03
    )
The following code(s) above H70.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to H70.1:
  • H60-H95
    2018 ICD-10-CM Range H60-H95

    Diseases of the ear and mastoid process

    Note
    • Use an external cause code following the code for the ear condition, if applicable, to identify the cause of the ear condition
    Type 2 Excludes
    • 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)
    Diseases of the ear and mastoid process
Code History

Diagnosis Index entries containing back-references to H70.1:

ICD-10-CM Codes Adjacent To H70.1
H70.01 Subperiosteal abscess of mastoid
H70.011 …… right ear
H70.012 …… left ear
H70.013 …… bilateral
H70.019 …… unspecified ear
H70.09 Acute mastoiditis with other complications
H70.091 …… right ear
H70.092 …… left ear
H70.093 …… bilateral
H70.099 …… unspecified ear
H70.1 Chronic mastoiditis
H70.10 …… unspecified ear
H70.11 …… right ear
H70.12 …… left ear
H70.13 …… bilateral
H70.2 Petrositis
H70.20 Unspecified petrositis
H70.201 …… right ear
H70.202 …… left ear
H70.203 …… bilateral
H70.209 …… unspecified ear

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.