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Z91.09

Billable

Other allergy status, other than to drugs and biological substances

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

What This Code Means

A patient has a documented allergy to substances other than drugs and biological products, not specified in other allergy codes.

Coding Tips

  • •This is a catch-all code for miscellaneous allergies; use more specific codes when available
  • •Ensure the allergy is not to medications or biologics, which have separate coding categories

Code Hierarchy

└Z91Personal risk factors, not elsewhere classified└Z91.0Allergy status, other than to drugs and biological substances└Z91.09Other allergy status, other than to drugs and biological substances
└Z91.09Other allergy status, other than to drugs and biological substances

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