ICD-10-CM diagnosis code
Z86.61 Personal history of infections of the central nervous system
- Billable
- Yes, a complete code (FY2026)
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Other codes in Z86
39 complete codes in this category.
- Z86.2Personal history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- Z86.31Personal history of diabetic foot ulcer
- Z86.32Personal history of gestational diabetes
- Z86.39Personal history of other endocrine, nutritional and metabolic disease
- Z86.51Personal history of combat and operational stress reaction
- Z86.59Personal history of other mental and behavioral disorders
- Z86.61Personal history of infections of the central nervous system
- Z86.69Personal history of other diseases of the nervous system and sense organs
- Z86.711Personal history of pulmonary embolism
- Z86.718Personal history of other venous thrombosis and embolism
- Z86.72Personal history of thrombophlebitis
- Z86.73Personal history of transient ischemic attack (TIA), and cerebral infarction without residual deficits
Documentation tips
- Make sure the note supports every element of the title, “Personal history of infections of the central nervous system”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to Z86.
The international WHO ICD-10 also has Z86, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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