ICD-10 Code A18: Tuberculosis of other organs
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).
đź“‹Clinical overview
This ICD-10 code is commonly used when documentation describes extrapulmonary tuberculosis affecting bones, joints, genitourinary organs, lymph nodes, abdominal structures, skin, eye, ear, endocrine organs, heart, spleen, or other named sites. The most accurate code depends on the documented organ site and whether the chart names a more specific anatomic location.
When is it used?
- May be used when a clinician documents tuberculosis of other organs in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
đź©şClinical context
- Infectious-disease, inpatient, specialty, and follow-up documentation where tuberculosis is documented outside the lungs and the affected organ system changes code specificity.
- Coding and utilization-review workflows where the chart clearly identifies extrapulmonary tuberculosis involving bone, genitourinary organs, lymph nodes, abdomen, skin, eye, ear, endocrine organs, heart, spleen, or another named site.
- Extrapulmonary-tuberculosis follow-up often includes microbiology, pathology, imaging, organ-specific monitoring, and infectious-disease treatment planning based on the affected site.
- Documentation usually becomes more specific when the chart identifies the exact organ, structure, or body system involved rather than using a broader 'other organs' tuberculosis label.
- Specialist context already linked on this page includes Infectious Disease Specialist, General Physician.
🔍Key distinctions
- This ICD-10 family covers extrapulmonary or other-organ tuberculosis and is distinct from pulmonary tuberculosis branches because the affected organ site drives code selection.
- Specific anatomic-site detail matters here, because spine, kidney, bladder, thyroid, adrenal, heart, spleen, skin, eye, ear, and other named organ involvement are coded separately when documented.
- This parent page groups extrapulmonary tuberculosis codes across multiple organ systems, so the final billable code usually depends on the exact organ or structure documented in the chart.
Code hierarchy
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
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Coding guidelines
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Common synonyms
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.