ICDcodes.org
FY2027

Z85.9 — Personal history of malignant neoplasm, unspecified

BillableUnspecified

Is Z85.9 billable?

Yes, but Z85.9 is an unspecified code. Z85.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Z85.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting Z85.9 — the more specific alternatives are listed below.

Z85.9 at a glance

CodeZ85.9
DescriptionPersonal history of malignant neoplasm, unspecified
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

What Medicare edits apply to Z85.9?

The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z85.9 directly.

Cannot be a principal diagnosis — MCE edit 9

CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.

Which MS-DRGs does Z85.9 group to?

Z85.9 sits in MDC 17 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 826Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCCsurgical
  • 827Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CCsurgical
  • 828Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCCsurgical

How is Z85.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Z85.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • History › personal › malignant neoplasm

Inclusion terms

Alternative wording in documentation that is classified to Z85.9.

Code first — inherited from Z85

The underlying condition below must be sequenced before Z85.9. Z85.9 describes a manifestation and cannot be the principal or first-listed diagnosis.

  • any follow-up examination after treatment of malignant neoplasm (Z08)

Use additional code — inherited from Z85

Report an additional code alongside Z85.9 to fully describe the condition. Z85.9 is sequenced first.

  • code to identify:
  • alcohol use and dependence (F10.-)
  • exposure to environmental tobacco smoke (Z77.22)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Excludes2 — not included here — inherited from Z85

The conditions below are not part of Z85.9, but a patient may have both at the same time. When documentation supports it, Z85.9 and the excluded code may both be reported.

  • personal history of benign neoplasm (Z86.01-)
  • personal history of carcinoma-in-situ (Z86.00-)

Code also — inherited from Z77-Z99

Two codes may be needed to describe the condition fully. Whether Z85.9 is sequenced first depends on the reason for the encounter.

  • any follow-up examination (Z08-Z09)

How long has Z85.9 existed?

Z85.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the Z85 family? (9)