Z85.858 — Personal history of malignant neoplasm of other endocrine glands
Is Z85.858 billable?
Yes — Z85.858 is billable for FY2027. Z85.858 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z85.858 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z85.858 at a glance
| Code | Z85.858 |
|---|---|
| Description | Personal history of malignant neoplasm of other endocrine glands |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to Z85.858?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z85.858 directly.
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 Z85.858 group to?
Z85.858 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 Z85.858 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z85.858. They show the wording a clinician may have documented, which often differs from the Tabular description.
- History › personal › malignant neoplasm › endocrine gland NEC
Code first — inherited from Z85
The underlying condition below must be sequenced before Z85.858. Z85.858 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 Z85.858 to fully describe the condition. Z85.858 is sequenced first.
Excludes2 — not included here — inherited from Z85
The conditions below are not part of Z85.858, but a patient may have both at the same time. When documentation supports it, Z85.858 and the excluded code may both be reported.
Code also — inherited from Z77-Z99
Two codes may be needed to describe the condition fully. Whether Z85.858 is sequenced first depends on the reason for the encounter.
- any follow-up examination (Z08-Z09)
How long has Z85.858 existed?
Z85.858 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.