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A43.9

Nocardiosis, unspecified

Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 3 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.
Exclusions 5 never code together
A00-B99chapter
Excludes1
  • certain localized infections - see body system-related chapters
Excludes2
  • carrier or suspected carrier of infectious disease (Z22.-)Z22.-
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
  • influenza and other acute respiratory infections (J00-J22)J00-J22

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 2
A00-B99chapter
Includes
  • diseases generally recognized as communicable or transmissible
Use additional code
  • code to identify resistance to antimicrobial drugs (Z16.-)Z16.-
Index entries leading here 1
  • Nocardiosis, nocardiasis A43.9
Alongside this code 3 same parent — A43
A43.0 Pulmonary nocardiosis A43.1 Cutaneous nocardiosis A43.8 Other forms of nocardiosis
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
A43
Block
A30-A49
Siblings
3

Present FY2024–FY2027.