I63.333 — Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries
Is I63.333 billable?
Yes — I63.333 is billable for FY2027. I63.333 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. I63.333 may be submitted for encounters from October 1, 2026 through September 30, 2027.
I63.333 at a glance
| Code | I63.333 |
|---|---|
| Description | Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does I63.333 group to?
I63.333 sits in MDC 01 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 023Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulatorsurgical
- 024Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCCsurgical
As a secondary diagnosis, I63.333 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is I63.333 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under I63.33, the nearest indexed parent of I63.333. Use them to find the family, then select the specific code.
- Occlusion, occluded › artery › cerebral › posterior › with infarction › due to › thrombosis
Excludes1 — never code together — inherited from I60-I69
The conditions below can never be reported together with I63.333 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- traumatic intracranial hemorrhage (S06.-)
Excludes1 — never code together — inherited from I63
The conditions below can never be reported together with I63.333 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- neonatal cerebral infarction (P91.82-)
Use additional code — inherited from I60-I69
Report an additional code alongside I63.333 to fully describe the condition. I63.333 is sequenced first.
Use additional code — inherited from I63
Report an additional code alongside I63.333 to fully describe the condition. I63.333 is sequenced first.
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I63.333, but a patient may have both at the same time. When documentation supports it, I63.333 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.-)
Excludes2 — not included here — inherited from I63
The conditions below are not part of I63.333, but a patient may have both at the same time. When documentation supports it, I63.333 and the excluded code may both be reported.
How long has I63.333 existed?
I63.333 first appears in FY2018 (FY2017 is not available, so it may have appeared then).
- FY2019Cerebral infarction to thrombosis of bilateral posterior cerebral arteriesCerebral infarction due to thrombosis of bilateral posterior cerebral arteries
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.