ICD-10-CM 2027
ICD-10 code for Cavernous sinus thrombophlebitis
Intracranial and intraspinal phlebitis and thrombophlebitis
From the official ICD-10-CM alphabetic index entry “Thrombophlebitis › cavernous (venous) sinus”. Page updated September 29, 2026.
About coding Cavernous sinus thrombophlebitis
The ICD-10-CM code for Cavernous sinus thrombophlebitis is G08 (Intracranial and intraspinal phlebitis and thrombophlebitis). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G08.
Don't report G08 together with the conditions in its Excludes1 note: abortion, ectopic or molar pregnancy (O00-O07, O08.7), pregnancy, childbirth and the puerperium (O22.5, O87.3) and nonpyogenic intracranial phlebitis and thrombophlebitis (I67.6).
The conditions in its Excludes2 note aren't part of G08, but may be coded alongside it if the patient has both: intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific Cavernous sinus thrombophlebitis codes (official index)
Don't confuse with (Excludes1 for G08)
Common questions about Cavernous sinus thrombophlebitis ICD-10 codes
What is the ICD-10 code for Cavernous sinus thrombophlebitis?
- G08 — Intracranial and intraspinal phlebitis and thrombophlebitis. More specific codes apply when the documentation supports them: O22.5, I67.6.
What is the ICD-10 code for nonpyogenic cavernous sinus thrombophlebitis?
- I67.6 — Nonpyogenic thrombosis of intracranial venous system.
Is G08 billable?
- Yes. G08 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G08 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G08 as a principal diagnosis.
Is G08 a CC or MCC?
- G08 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.