I71.012 — Dissection of descending thoracic aorta
Is I71.012 billable?
Yes — I71.012 is billable for FY2027. I71.012 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. I71.012 may be submitted for encounters from October 1, 2026 through September 30, 2027.
I71.012 at a glance
| Code | I71.012 |
|---|---|
| Description | Dissection of descending thoracic aorta |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does I71.012 group to?
I71.012 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
As a secondary diagnosis, I71.012 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is I71.012 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to I71.012. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Dissection › aorta › thoracic › descending thoracic aorta
Code first — inherited from I71
The underlying condition below must be sequenced before I71.012. I71.012 describes a manifestation and cannot be the principal or first-listed diagnosis.
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I71.012, but a patient may have both at the same time. When documentation supports it, I71.012 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 I71.012 existed?
I71.012 first appears in FY2023.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.