C44.59 vs Z85.04

C44.59 (Other specified malignant neoplasm of skin of trunk) compared with Z85.04 (Personal history of malignant neoplasm of rectum, rectosigmoid junction, and anus), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources

Summary

Z85.04 is the personal-history or screening code for the active disease C44.59 names, so the two are not interchangeable.

MedCoder-derived

What is different?

The conditions named and chapter.C44.59 is “Other specified malignant neoplasm of skin of trunk”; Z85.04 is “Personal history of malignant neoplasm of rectum, rectosigmoid junction, and anus”. C44.59 sits in C00-D49 — Neoplasms (C00-D49); Z85.04 in Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99).

Registry fact

Can these codes be reported together?

Not for the same condition.Z85.04 is the personal-history or screening code for the active disease C44.59 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.

MedCoder-derivedGuide: History codes (Z codes)

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. C44.59 carries 6 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

None.Neither entry carries an Excludes2 note that names the other code. Z85.04 carries 2 Excludes2 notes covering other codes; the side-by-side table quotes them.

Official rule

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

Both are headers.Both are non-billable headers, and neither contains the other.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

Yes.History or screening versus active disease. Z85.04 is the personal-history or screening code for the active disease C44.59 names.

MedCoder-derivedGuide: History codes (Z codes)

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Review

Condition lifecycle relationship

Z85.04

Personal history of malignant neoplasm of rectum, rectosigmoid junction, and anus

↔

C44.59

Other specified malignant neoplasm of skin of trunk

What we found

History or screening versus active disease.Z85.04 is the personal-history or screening code for the active disease C44.59 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.

What to review

Report the history code when the condition no longer exists and is no longer treated; report the active-disease code while it is.

Guide: History codes (Z codes)Check these on a claim

Why it matters

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 / rule

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

Side by side

	C44.59Other specified malignant neoplasm of skin of trunk	Z85.04Personal history of malignant neoplasm of rectum, rectosigmoid junction, and anus
Billing status	Non-billable header Report instead: C44.590, C44.591, C44.599	Non-billable header Report instead: Z85.040, Z85.048
Classification	C00-D49 — Neoplasms (C00-D49)	Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
Definition	Other specified malignant neoplasm of skin of trunk is a non-billable ICD-10-CM category code (C44.59).	Personal history of malignant neoplasm of rectum, rectosigmoid junction, and anus is a non-billable ICD-10-CM category code (Z85.04).
Includes	malignant neoplasm of sebaceous glands malignant neoplasm of sweat glands	—
Excludes1	anus NOS (C21.0) scrotum (C63.2) Kaposi's sarcoma of skin (C46.0) malignant melanoma of skin (C43.-) malignant neoplasm of skin of genital organs (C51-C52, C60.-, C63.2) Merkel cell carcinoma (C4A.-)	—
Excludes2	—	personal history of benign neoplasm (Z86.01-) personal history of carcinoma-in-situ (Z86.00-)
Code first	—	any follow-up examination after treatment of malignant neoplasm (Z08)
Use additional code	—	code to identify: alcohol use and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22)
Code also	—	any follow-up examination (Z08-Z09)

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

Edit this comparison Check a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources