Specific code 2010 ICD-9-CM Diagnosis Code 383.1
Chronic mastoiditis
  • ICD-9-CM 383.1 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 383.1 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
  • You are viewing the 2010 version of ICD-9-CM 383.1.
  • More recent version(s) of ICD-9-CM 383.1: 2011 2012 2013 2014 2015.
Convert to ICD-10-CM: 383.1 converts approximately to:
  • 2015/16 ICD-10-CM H70.10 Chronic mastoiditis, unspecified ear
Approximate Synonyms
  • Bilat chronic mastoiditis
  • Bilateral chronic mastoiditis
  • Both sides chronic mastoiditis
  • Left chronic mastoiditis
  • Mastoiditis, chronic
  • Right chronic mastoiditis
383.1 Excludes
  • tuberculous mastoiditis (015.6)
Applies To
  • Caries of mastoid
  • Fistula of mastoid
ICD-9-CM Volume 2 Index entries containing back-references to 383.1:
  • Caries (bone) (see also Tuberculosis, bone) 015.9 [730.8]
    • mastoid (chronic) (process) 383.1
  • Fistula (sinus) 686.9
    • mastoid (process) (region) 383.1
  • Mastoiditis (coalescent) (hemorrhagic) (pneumococcal) (streptococcal) (suppurative) 383.9
    • chronic (necrotic) (recurrent) 383.1
  • Necrosis, necrotic
    • mastoid (chronic) 383.1
  • Sclerosis, sclerotic
    • mastoid 383.1
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 383.1 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2010 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.