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Z77.120

Billable

Contact with and (suspected) exposure to mold (toxic)

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A person has been exposed to or is suspected of being exposed to toxic mold, which can cause respiratory symptoms, allergic reactions, or other health effects.

Coding Tips

  • Document the location of mold exposure (home, workplace, water-damaged building) and any associated symptoms or conditions.
  • This code should be paired with any resulting diagnoses such as asthma, allergic rhinitis, or respiratory symptoms if present.

Code Hierarchy

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