I67.6
Nonpyogenic thrombosis of intracranial venous system
I67.6 (also written I676) is a billable ICD-10-CM diagnosis code for nonpyogenic thrombosis of intracranial venous system. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 17 codes in category I67 (Other cerebrovascular diseases). The Alphabetic Index lists it under 12 entries. Its coding notes include a Use additional code instruction, 4 Excludes1 entries and 11 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (8 notes)
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- nonpyogenic thrombosis of intracranial venous system causing infarction (I63.6)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (10 notes)
- 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.-)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the Neuro Rehabilitation clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026IRF 60% Rule
On the CMS list of diagnoses used to determine presumptive compliance with the IRF 60 percent rule.
Source: CMS IRF Presumptive Compliance-3, FY 2027 IRF PPS final rule files, effective for discharges on or after October 1, 2026Hospital CC
Counts as a complication or comorbidity (CC) when reported as a secondary diagnosis on an inpatient claim. It does not count when the principal diagnosis is one of the 62 codes in its exclusion list. Some MS-DRGs also ignore a CC or MCC that defines the DRG.
Source: CMS MS-DRG Definitions Manual v44, effective October 1, 2026, Appendix CInclusion terms
Conditions classified to this code.
- Nonpyogenic thrombosis of cerebral vein
- Nonpyogenic thrombosis of intracranial venous sinus
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 12 entries
- Embolism (multiple) (paradoxical), intracranial, venous sinus (any), nonpyogenic
- Phlebitis (infective) (pyemic) (septic) (suppurative), intracranial (venous) sinus (any), nonpyogenic
- Thrombophlebitis, cavernous (venous) sinus, nonpyogenic
- Thrombophlebitis, cerebral (sinus) (vein), nonpyogenic
- Thrombophlebitis, intracranial venous sinus (any), nonpyogenic
- Thrombophlebitis, lateral (venous) sinus, nonpyogenic
- Thrombophlebitis, longitudinal (venous) sinus, nonpyogenic
- Thrombophlebitis, sinus (intracranial), nonpyogenic
- Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), intracranial (arterial), venous sinus (any)
- Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), intracranial (arterial), venous sinus (any), nonpyogenic
- Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), intracranial (arterial), venous sinus (any), nonpyogenic origin
- Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), vein (acute), cerebral, nonpyogenic