Skip to main content

C34.1 vs Z85.1

C34.1 (Malignant neoplasm of upper lobe, bronchus or lung) compared with Z85.1 (Personal history of malignant neoplasm of trachea, bronchus and lung), from the official CMS tabular data. Z85.1 is the personal-history/screening code for the active disease C34.1 names.

Relationship

Review

Condition lifecycle relationship

Z85.1
Personal history of malignant neoplasm of trachea, bronchus and lung
↔
C34.1
Malignant neoplasm of upper lobe, bronchus or lung

Personal-history or screening code versus the active disease.

Active disease for this site (bronchus)

A personal-history code describes a condition that no longer exists and is no longer being treated, so it is not interchangeable with the active-disease code for the same site.

Source: CMS Table of Neoplasms (site match derived from the code title)

Can these codes be reported together?

History or screening versus active disease. Z85.1 is the personal-history or screening code for the active disease C34.1 names.

Site match derived from the code’s own title against the CMS Table of Neoplasms. A personal-history code describes a condition that no longer exists and is no longer being treated, so it is not interchangeable with the active-disease code.

Side by side

C34.1Malignant neoplasm of upper lobe, bronchus or lungZ85.1Personal history of malignant neoplasm of trachea, bronchus and lung
Billing statusNon-billable header

Report instead: C34.10, C34.11, C34.12

Non-billable header

Report instead: Z85.110, Z85.118, Z85.12

ClassificationC00-D49 — NeoplasmsZ00-Z99 — Factors influencing health status and contact with health services
DefinitionMalignant neoplasm of upper lobe, bronchus or lung is a non-billable ICD-10-CM category code (C34.1).Personal history of malignant neoplasm of trachea, bronchus and lung is a non-billable ICD-10-CM category code (Z85.1).
Includes
malignant neoplasm of middle ear
—
Use additional code
code to identify:
exposure to environmental tobacco smoke (Z77.22)
exposure to tobacco smoke in the perinatal period (P96.81)
code to identify:
alcohol use and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
Code first—
any follow-up examination after treatment of malignant neoplasm (Z08)
Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources