A42
Non-billableActinomycosis
Actinomycosis
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •actinomycetomaB47.1
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
Child Codes (6)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(17)
UMLS
- ACTINOMYCES INFECTC0001261
- Actinomyces InfectionC0001261
- Actinomyces InfectionsC0001261
- ActinomycosesC0001261
- ActinomycosisC0001261
- Actinomycosis, unspecifiedC0001261
- Actinomycotic infectionC0001261
- Actinomycotic infection (disorder)C0001261
- Actinomycotic infection of unspecified siteC0001261
- Actinomycotic infectious disordersC0001261
- INFECT ACTINOMYCESC0001261
- Infection, ActinomycesC0001261
- Infections, ActinomycesC0001261
- actinomyces infectionC0001261
- actinomycosesC0001261
- actinomycosisC0001261
- actinomycotic infectionC0001261
Frequently Asked Questions
What is the ICD-10 code for actinomycosis?
The ICD-10-CM code for actinomycosis is A42. The full clinical description is "Actinomycosis". A42 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code A42 mean?
ICD-10-CM code A42 represents “Actinomycosis”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a non-billable header code. Use a more specific child code for billing purposes.
Is A42 a billable code?
No, A42 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 6 child codes under A42.
What chapter is A42 in?
A42 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A42?
A42 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; actinomycetoma (B47.1).
What are the subcategories under A42?
A42 has 6 child codes, including: A42.0 (Pulmonary actinomycosis), A42.1 (Abdominal actinomycosis), A42.2 (Cervicofacial actinomycosis), A42.7 (Actinomycotic sepsis), and 2 more.
Are additional codes required with A42?
Yes, when using A42, also report: resistance to antimicrobial drugs (Z16.-).
What are the UMLS CUIs for A42?
A42 is linked to 1 UMLS Concept Unique Identifier: C0001261. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A42 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like actinomycosis affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A42?
A42 maps to the ICD-11 code: 1C10.Z (Actinomycosis, unspecified).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.