C44.6 vs Z12.83

C44.6 (Other and unspecified malignant neoplasm of skin of upper limb, including shoulder) compared with Z12.83 (Encounter for screening for malignant neoplasm of skin), from the official CMS tabular data. Z12.83 is the personal-history/screening code for the active disease C44.6 names. MedCoder-derived

Relationship

Review

Condition lifecycle relationship

Z12.83

Encounter for screening for malignant neoplasm of skin

↔

C44.6

Other and unspecified malignant neoplasm of skin of upper limb, including shoulder

Personal-history or screening code versus the active disease.

Active disease for this site (skin)

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. Z12.83 is the personal-history or screening code for the active disease C44.6 names.

Site match derived from the code’s own title against the CMS/CDC 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

	C44.6Other and unspecified malignant neoplasm of skin of upper limb, including shoulder	Z12.83Encounter for screening for malignant neoplasm of skin
Billing status	Non-billable header Report instead: C44.601, C44.602, C44.609, C44.611, C44.612	Billable
Classification	C00-D49 — Neoplasms (C00-D49)	Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
Definition	Other and unspecified malignant neoplasm of skin of upper limb, including shoulder is a non-billable ICD-10-CM category code (C44.6).	Encounter for screening for malignant neoplasm of skin is a billable ICD-10-CM diagnosis code (Z12.83).
Includes	malignant neoplasm of sebaceous glands malignant neoplasm of sweat glands	—
Use additional code	—	code to identify any family history of malignant neoplasm (Z80.-)

Edit this comparison Check 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