I79.8 — Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere
Is I79.8 billable?
Yes — I79.8 is billable for FY2027. I79.8 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. I79.8 may be submitted for encounters from October 1, 2026 through September 30, 2027.
I79.8 at a glance
| Code | I79.8 |
|---|---|
| Description | Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to I79.8?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name I79.8 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does I79.8 group to?
I79.8 sits in MDC 05 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.
- 299Peripheral Vascular Disorders with MCCmedical
- 300Peripheral Vascular Disorders with CCmedical
- 301Peripheral Vascular Disorders without CC/MCCmedical
How is I79.8 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to I79.8. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Degeneration, degenerative › capillaries › amyloid
- Endarteritis › syphilitic › congenital (bacterial, subacute) (infective)
Excludes1 — never code together
The conditions below can never be reported together with I79.8 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first
The underlying condition below must be sequenced before I79.8. I79.8 describes a manifestation and cannot be the principal or first-listed diagnosis.
- underlying disease, such as:
- amyloidosis (E85.-)
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I79.8, but a patient may have both at the same time. When documentation supports it, I79.8 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
How long has I79.8 existed?
I79.8 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.
Which codes are confused with I79.8?
ICD-10-CM declares these codes mutually exclusive with I79.8 — exactly one of each pair can be correct for a given encounter.