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ICD-10-CM Codes
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A00-B99
Certain infectious and parasitic diseases
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A30-A49
Other bacterial diseases
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A42-
Actinomycosis
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2021 ICD-10-CM Diagnosis Code A42
2021 ICD-10-CM Diagnosis Code A42
Actinomycosis
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- A42 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2021 edition of ICD-10-CM A42 became effective on October 1, 2020.
- This is the American ICD-10-CM version of A42 - other international versions of ICD-10 A42 may differ.
Type 1 ExcludesType 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 A42. 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.
The following code(s) above
A42 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
A42:
- An infectious process caused by bacteria of the actinomyces species. It is characterized by the formation of purulent and painful abscesses in the mouth, lungs and gastrointestinal tract.
- Infections with bacteria of the genus actinomyces.
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To A42
A41.5 Sepsis due to other Gram-negative organisms
A41.50 Gram-negative sepsis, unspecified
A41.51 Sepsis due to Escherichia coli [E. coli]
A41.52 Sepsis due to Pseudomonas
A41.59 Other Gram-negative sepsis
A41.8 Other specified sepsis
A41.81 Sepsis due to Enterococcus
A41.9 Sepsis, unspecified organism
A42
Actinomycosis
A42.0 Pulmonary actinomycosis
A42.1 Abdominal actinomycosis
A42.2 Cervicofacial actinomycosis
A42.7 Actinomycotic sepsis
A42.8 Other forms of actinomycosis
A42.81 Actinomycotic meningitis
A42.82 Actinomycotic encephalitis
A42.89 Other forms of actinomycosis
A42.9 Actinomycosis, unspecified
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
