ICD-10-CM Code H70.1

Chronic mastoiditis

Version 2021 Non-Billable Code

Not Valid for Submission

H70.1 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of chronic mastoiditis. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions.

ICD-10:H70.1
Short Description:Chronic mastoiditis
Long Description:Chronic mastoiditis

Consider the following ICD-10 codes with a higher level of specificity:

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code H70.1:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Caries of mastoid
  • Fistula of mastoid

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • tuberculous mastoiditis A18.03

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code H70.1 are found in the index:


Code Classification

  • Diseases of the ear and mastoid process (H60–H95)
    • Diseases of middle ear and mastoid (H65-H75)
      • Mastoiditis and related conditions (H70)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients


Ear Infections

Also called: Otitis media

Ear infections are the most common reason parents bring their child to a doctor. Three out of four children will have at least one ear infection by their third birthday. Adults can also get ear infections, but they are less common.

The infection usually affects the middle ear and is called otitis media. The tubes inside the ears become clogged with fluid and mucus. This can affect hearing, because sound cannot get through all that fluid.

If your child isn't old enough to say "My ear hurts," here are a few things to look for

  • Tugging at ears
  • Crying more than usual
  • Fluid draining from the ear
  • Trouble sleeping
  • Balance difficulties
  • Hearing problems

Your health care provider will diagnose an ear infection by looking inside the ear with an instrument called an otoscope.

Often, ear infections go away on their own. Your health care provider may recommend pain relievers. Severe infections and infections in young babies may require antibiotics.

Children who get infections often may need surgery to place small tubes inside their ears. The tubes relieve pressure in the ears so that the child can hear again.

NIH: National Institute on Deafness and Other Communication Disorders

  • Cholesteatoma (Medical Encyclopedia)
  • Ear discharge (Medical Encyclopedia)
  • Ear examination (Medical Encyclopedia)
  • Ear infection - acute (Medical Encyclopedia)
  • Ear infection - chronic (Medical Encyclopedia)
  • Ear tube insertion (Medical Encyclopedia)
  • Earache (Medical Encyclopedia)
  • Otitis media with effusion (Medical Encyclopedia)
  • Swimmer's ear (Medical Encyclopedia)

[Learn More]