I27.849 — Fontan related circulation, unspecified
Is I27.849 billable?
Yes, but I27.849 is an unspecified code. I27.849 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, I27.849 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 I27.849 — the more specific alternatives are listed below.
I27.849 at a glance
| Code | I27.849 |
|---|---|
| Description | Fontan related circulation, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does I27.849 group to?
I27.849 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.
- 314Other Circulatory System Diagnoses with MCCmedical
- 315Other Circulatory System Diagnoses with CCmedical
- 316Other Circulatory System Diagnoses without CC/MCCmedical
How is I27.849 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to I27.849. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Circulation › Fontan related
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I27.849, but a patient may have both at the same time. When documentation supports it, I27.849 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 I27.849 existed?
I27.849 first appears in FY2026.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.