Is ICD-10-CM code Z78 billable?

No, Z78 (Other specified health status) 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 Z78 belong to?

Z78 belongs to Chapter 21 of the ICD-10-CM tabular list: Z00–Z99 (Factors Influencing Health Status and Contact with Health Services).

Z78Not billable, use a more specific code below

Other specified health status

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

3 billable codes under Z78: none are a CC or MCC; none map to an HCC.

Instructional notes

Excludes2: not included here, code separately if applicable

asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
postprocedural status (Z93-Z99)
sex reassignment status (Z87.890-)

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 Z78.

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 Z78

Z78 can't be used on a claim. Pick a billable code below; grey headings group them.

Z78 MS-DRG

As the principal diagnosis, all 3 billable codes under Z78 group to MS-DRG 951 (v44.0).

DRG 951 Other Factors Influencing Health Status

Code history

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