MCMedicalCodingSoftware
Free trial
Z91.013

Z91.013: Allergy to seafood

Billable / specific codeICD-10-CMPOA exempt

Z91.013 is a billable, specific ICD-10-CM code for allergy to seafood. It is valid for submission on a claim.

Check Z91.013 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Allergy to shellfish
  • Allergy to octopus or squid ink

Excludes2 inherited from the categories above Z91.013

Not part of this code, but both may be coded when both are present.

Written on Z91.01: Food allergy status

  • food additives allergy status (Z91.02)

Written on Z91.0: Allergy status, other than to drugs and biological substances

  • Allergy status to drugs, medicaments, and biological substances (Z88.-)

Written on Z91: Personal risk factors, not elsewhere classified

  • contact with and (suspected) exposures hazardous to health (Z77.-)
  • exposure to pollution and other problems related to physical environment (Z77.1-)
  • female genital mutilation status (N90.81-)
  • occupational exposure to risk factors (Z57.-)
  • personal history of physical injury and trauma (Z87.81, Z87.82-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Z91.013 is named in 13 Medicare coverage policies: 13 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52448Billing and Coding: Omalizumab and biosimilar, OMLYCLO® (omalizumab-igec)
  • A56558Billing and Coding: Allergy Testing
  • A57531Billing and Coding: Allergy Testing
  • A60360Billing and Coding: Allergy Diagnostic Testing

Alphabetic index entries that lead here

  • Allergy, allergic›food NEC›status›seafood
  • History›personal›allergy›food›seafood

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Z91.01

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.