ICD-10-CM 2027 diagnosis code
Z29.1Encounter for prophylactic immunotherapy
Z29.1 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Z29.1
Z29.1 is the ICD-10-CM diagnosis code for encounter for prophylactic immunotherapy. It belongs to category Z29 (encounter for other prophylactic measures), block Z20-Z29 (persons with potential health hazards related to communicable diseases) 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 4 subcodes must be used instead.
Within Z29 (encounter for other prophylactic measures), Z29.1 is specifically for encounter for prophylactic immunotherapy. Related codes cover prophylactic fluoride administration (Z29.3), other specified prophylactic measures (Z29.8) and prophylactic measures, unspecified (Z29.9).
To report this condition, pick the subcode that matches the documentation: Z29.11 (for respiratory syncytial virus (RSV)), Z29.12 (antivenin), Z29.13 (globulin) and Z29.14 (globulin).
It was added in FY2017, effective October 1, 2016.
Specific codes under Z29.1
Coding notes
- Encounter for administration of immunoglobulin
Notes that apply from higher levels
Instructions written at a parent level also apply to Z29.1.
Broader instructions also apply from Chapter 21: Factors influencing health status and contact with health services.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2017 (effective 10/1/2016): Added
- No changes since FY2017.
Common questions about Z29.1
Is Z29.1 billable?
- No. Z29.1 is a header code. Report one of its more specific subcodes instead.