Is Z29.1 a billable ICD-10 code?

No. Z29.1 is a non-billable header code. Use a more specific subcategory for claims.

Z29.1 ⚠ Non-billable

Encounter for prophylactic immunotherapy

Q: What is ICD-10 code Z29.1?

ICD-10-CM code Z29.1 stands for "Encounter for prophylactic immunotherapy". It is a non-billable header code in the Factors Influencing Health Status chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Factors Influencing Health Status

Code

Z29.1

System

ICD-10-CM

Billable

No — use specific code

Effective

FY2026

Chapter

Factors Influencing Health Status

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code Z29.1?

ICD-10-CM code Z29.1 represents Encounter for prophylactic immunotherapy. It is a non-billable header code requiring a more specific subcategory in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.

Is Z29.1 billable?

No. Z29.1 is a non-billable header. Select a more specific subcategory for claims submission.

What chapter is Z29.1 in?

Z29.1 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.

Related codes in the Z29 category

Z29 Encounter for other prophylactic measures Non-billable Z29.3 Encounter for prophylactic fluoride administration Billable Z29.8 Encounter for other specified prophylactic measures Non-billable Z29.9 Encounter for prophylactic measures, unspecified Billable Z29.11 Encounter for prophylactic immunotherapy for respiratory syncytial virus (RSV) Billable Z29.12 Encounter for prophylactic antivenin Billable Z29.13 Encounter for prophylactic Rho(D) immune globulin Billable Z29.14 Encounter for prophylactic rabies immune globin Billable

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