Is ICD-10-CM code Z88 billable?

No, Z88 (Allergy status to drugs, medicaments and biological substances) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code Z88 belong to?

Z88 belongs to Chapter 21 of the ICD-10-CM tabular list: Z00–Z99 (Factors Influencing Health Status and Contact with Health Services).

Z88Not billable, use a more specific code below

Allergy status to drugs, medicaments and biological substances

In Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99), chapter 21: Factors Influencing Health Status and Contact with Health Services

10 billable codes under Z88: none are a CC or MCC; none map to an HCC.

Instructional notes

Excludes2: not included here, code separately if applicable

Allergy status, other than to drugs and biological substances (Z91.0-)

Also applies, from Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

These notes sit on Z77-Z99 and apply to every code under it, including Z88.

Code also: add a code for this too, order depends on the encounter

any follow-up examination (Z08-Z09)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers when and how to use Z codes (Z00-Z99) for encounters and supplementary information, including contact, status, history, screening, aftercare, exams, and social determinants of health.

Use of Z Codes in Any Healthcare Setting (page 92)
Z Codes Indicate a Reason for an Encounter or Provide Additional Information about a Patient Encounter (page 93)
Categories of Z Codes (page 93)

Read Section I.C.21 (page 92)

All codes under Z88

Z88 can't be used on a claim. Pick a billable code below; grey headings group them.

Z88 MS-DRG

As the principal diagnosis, all 10 billable codes under Z88 group to MS-DRG 951 (v44.0).

DRG 951 Other Factors Influencing Health Status

Other codes that refer to Z88

Notes on these codes point to Z88.

Z87.892 Code Also: allergy status to drugs, medicaments and biological substances (Z88.-)
Z91.0 Excludes2: Allergy status to drugs, medicaments, and biological substances (Z88.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Antibiotics

Antibiotics are medicines that fight bacterial infections in people and animals. They work by killing the bacteria or by making it hard for the bacteria to grow and multiply.

Drug Reactions

Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.