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ICD-10-CM 2027 diagnosis code

Z67.4Type O blood

Not billable — use a more specific code

Z67.4 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z67.4

Z67.4 is the ICD-10-CM diagnosis code for type O blood. It belongs to category Z67 (blood type), block Z67 (blood type) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within Z67 (blood type), Z67.4 is specifically for type O blood. Related codes cover type A blood (Z67.1), type B blood (Z67.2), type AB blood (Z67.3), unspecified blood type (Z67.9) and Duffy phenotype (Z67.A).

To report this condition, pick the subcode that matches the documentation: Z67.40 (Rh positive) and Z67.41 (Rh negative).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Z67.4

Notes that apply from higher levels

Instructions written at a parent level also apply to Z67.4.

Broader instructions also apply from Chapter 21: Factors influencing health status and contact with health services.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z67.4

Is Z67.4 billable?

No. Z67.4 is a header code. Report one of its more specific subcodes instead.