D33.9 vs Z12.82

D33.9 (Benign neoplasm of central nervous system, unspecified) compared with Z12.82 (Encounter for screening for malignant neoplasm of nervous system), from the official CMS tabular data. Z12.82 is the personal-history/screening code for the active disease D33.9 names.

Relationship

Review

Condition lifecycle relationship

Z12.82

Encounter for screening for malignant neoplasm of nervous system

↔

D33.9

Benign neoplasm of central nervous system, unspecified

Personal-history or screening code versus the active disease.

Benign neoplasm of this site (nervous system)

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. Z12.82 is the personal-history or screening code for the active disease D33.9 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

	D33.9Benign neoplasm of central nervous system, unspecified	Z12.82Encounter for screening for malignant neoplasm of nervous system
Billing status	Billable	Billable
Classification	C00-D49 — Neoplasms (C00-D49)	Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
Definition	Benign neoplasm of central nervous system, unspecified is a billable ICD-10-CM diagnosis code (D33.9).	Encounter for screening for malignant neoplasm of nervous system is a billable ICD-10-CM diagnosis code (Z12.82).
Includes	Benign neoplasm of nervous system (central) NOS	—
Use additional code	—	code to identify any family history of malignant neoplasm (Z80.-)

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