FY2027 ICD-10-CM reference
Z85.230: Personal history of malignant carcinoid tumor of thymus
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Personal history of malignant carcinoid tumor of thymus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
Source: Z00-Z99 (chapter, inherited).
Instructional note
(a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
Source: Z00-Z99 (chapter, inherited).
Instructional note
(b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
Source: Z00-Z99 (chapter, inherited).
Code also
any follow-up examination (Z08-Z09)
Source: Z77-Z99 (section, inherited).
Code first
any follow-up examination after treatment of malignant neoplasm (Z08)
Source: Z85 (category, inherited).
Instructional note
code to identify:
Source: Z85 (category, inherited).
Instructional note
alcohol use and dependence (F10.-)
Source: Z85 (category, inherited).
Instructional note
exposure to environmental tobacco smoke (Z77.22)
Source: Z85 (category, inherited).
Instructional note
history of tobacco dependence (Z87.891)
Source: Z85 (category, inherited).
Instructional note
occupational exposure to environmental tobacco smoke (Z57.31)
Source: Z85 (category, inherited).
Instructional note
tobacco dependence (F17.-)
Source: Z85 (category, inherited).
Instructional note
tobacco use (Z72.0)
Source: Z85 (category, inherited).
Excludes2
personal history of benign neoplasm (Z86.01-)
Source: Z85 (category, inherited).
Excludes2
personal history of carcinoma-in-situ (Z86.00-)
Source: Z85 (category, inherited).
Instructional note
Conditions classifiable to C7A.091
Source: Z85.230 (self, direct).
Compare the FY2027 additions, removals and billable-status changes
What does Z85.230 mean in FY2027?
The official ICD-10-CM descriptor is Personal history of malignant carcinoid tumor of thymus. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is Z85.230 billable in FY2027?
The FY2027 order file marks Z85.230 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does Z85.230 map to an HCC?
Z85.230 has no CMS-HCC V28 category in the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service). ESRD, RxHCC, PACE and HHS-HCC mappings are still pending verification for FY2027.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition