Z86.79 — Personal history of other diseases of the circulatory system
Is Z86.79 billable?
Yes — Z86.79 is billable for FY2027. Z86.79 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z86.79 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z86.79 at a glance
| Code | Z86.79 |
|---|---|
| Description | Personal history of other diseases of the circulatory system |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to Z86.79?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z86.79 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 Z86.79 group to?
Z86.79 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 951Other Factors Influencing Health Statusmedical
How is Z86.79 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z86.79. They show the wording a clinician may have documented, which often differs from the Tabular description.
- History › personal › disease or disorder › circulatory system
- History › personal › disease or disorder › circulatory system › specified condition NEC
Code first — inherited from Z86
The underlying condition below must be sequenced before Z86.79. Z86.79 describes a manifestation and cannot be the principal or first-listed diagnosis.
- any follow-up examination after treatment (Z09)
Excludes2 — not included here — inherited from Z86.7
The conditions below are not part of Z86.79, but a patient may have both at the same time. When documentation supports it, Z86.79 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 Z86.79 is sequenced first depends on the reason for the encounter.
- any follow-up examination (Z08-Z09)
How long has Z86.79 existed?
Z86.79 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.