2027 ICD-10-CM Diagnosis Code Z91.014Allergy to mammalian meats

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z91

ICD-10-CM Z91.014
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Z91.014 is a billable ICD-10-CM diagnosis code for allergy to mammalian meats. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.

Code Identity

ICD-10-CM Code
Z91.014
Billable Status
Yes — Valid for Submission
Code Describes
Allergy to mammalian meats
Short Description
Allergy to mammalian meats
Same as the full description in the CMS dataset.
Parent Code
Z91.01
Food allergy status

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ91Personal risk factors, not elsewhere classified
This CodeZ91.014Allergy to mammalian meats

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z91.014.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z91.014 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Allergy to beef
  • Allergy to beef due to alpha-gal syndrome
  • Allergy to cattle protein
  • Allergy to cetuximab due to alpha-gal syndrome
  • Allergy to galactose-alpha-1,3 galactose
  • Allergy to immunoglobulin
  • Allergy to meat
  • Allergy to pork
  • Allergy to red meat
  • Allergy to red meat due to alpha-gal syndrome
  • Alpha-gal syndrome

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z91.014: its own notes plus those printed at Z91.01, Z91.0, Z91, block Z77-Z99, and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Allergy to beef
  • Allergy to lamb
  • Allergy to pork
  • Allergy to red meats
  • Alpha-gal syndrome (AGS)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Z91.01 Food allergy status applies to 10 codes
  • food additives allergy status (Z91.02)
From Z91.0 Allergy status, other than to drugs and biological substances applies to 17 codes
  • Allergy status to drugs, medicaments, and biological substances (Z88.-)
From Z91 Personal risk factors, not elsewhere classified applies to 62 codes
  • 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-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From Block Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status applies to 567 codes
  • any follow-up examination (Z08-Z09)

Notes

General instructions on how these codes are used.

From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z91.014, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming Z91.014: its condition is not part of those codes, and both may be reported when the patient has both.

  • Z88 Allergy status to drugs, medicaments and biological substances
    Allergy status, other than to drugs and biological substances (Z91.0-) names Z91.0-, which includes this code

Use Additional Code 2

These codes say to use an additional code from the note, and Z91.014 is one of the codes named.

  • D89.44 Hereditary alpha tryptasemia
    allergy status, other than to drugs and biological substances (Z91.0-) names Z91.0-, which includes this code
  • K52.2 Allergic and dietetic gastroenteritis and colitis
    code to identify type of food allergy (Z91.01-, Z91.02-) names Z91.01-, which includes this code

Code Also 1

These codes say Z91.014 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • Z87.892 Personal history of anaphylaxis
    allergy status, other than to drugs and biological substances (Z91.0-) names Z91.0-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC025
Other specified status
Default principal diagnosis: inpatient No · outpatient Yes

Code History & ChangesHistory

Replacement Z91.014 replaces the following previously assigned code(s):

  • Z91.018 - Allergy to other foods
FY 2022AddedAdded to the ICD-10-CM code setEffective October 1, 2021.
FY 2023–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z91.014Overview

What is the ICD-10 code for allergy to mammalian meats?

The ICD-10-CM code for allergy to mammalian meats is Z91.014 (sometimes written as Z91014). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is Z91.014 (Food allergy status) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report allergy to mammalian meats on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does Z91.014 group to?

On inpatient claims, allergy to mammalian meats maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.

Can Z91.014 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because allergy to mammalian meats describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z91.014 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for allergy to mammalian meats on inpatient claims. The code appears in the Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) range of the CMS exempt list.