A42 ICD-10-CM Code: Actinomycosis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
A42Actinomycosis
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where A42 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Other bacterial diseases (A30-A49)
- 3
Category A42
Actinomycosis
- 4
Code A42
Actinomycosis
More specific choices
Codes under A42
A42 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for A42.
Code first
No “code first” instruction is listed for A42.
Use additional code
No “use additional code” instruction is listed for A42.
Excludes1
Conditions that should not be reported together with this code.
- actinomycetoma (B47.1)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for A42.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code A42 mean?
A42 is the FY 2027 U.S. ICD-10-CM code for “Actinomycosis.”
Is A42 a billable or specific ICD-10-CM code?
No. A42 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is A42 located in ICD-10-CM?
A42 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Other bacterial diseases (A30-A49) (A30–A49), under category A42, Actinomycosis.
What coding notes are listed for A42?
No inclusion terms are listed for A42 in this reference record. No code-first instruction is listed. Excludes1 notes: actinomycetoma (B47.1). No Excludes2 note is listed.
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