G08
Intracranial and intraspinal phlebitis and thrombophlebitis
G08 is a billable ICD-10-CM diagnosis code for intracranial and intraspinal phlebitis and thrombophlebitis. It is part of the FY2027 code set, effective October 1, 2026. The Alphabetic Index lists it under 14 entries. Its coding notes include 4 Excludes1 entries and 9 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
- intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
Also from chapter/block level (8 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)
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 MCC
Counts as a major complication or comorbidity (MCC) when reported as a secondary diagnosis on an inpatient claim. It does not count when the principal diagnosis is one of the 72 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.
- Septic embolism of intracranial or intraspinal venous sinuses and veins
- Septic endophlebitis of intracranial or intraspinal venous sinuses and veins
- Septic phlebitis of intracranial or intraspinal venous sinuses and veins
- Septic thrombophlebitis of intracranial or intraspinal venous sinuses and veins
- Septic thrombosis of intracranial or intraspinal venous sinuses and veins
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 14 entries
- Embolism (multiple) (paradoxical), intracranial, venous sinus (any)
- Embolism (multiple) (paradoxical), intraspinal venous sinuses or veins
- Embolism (multiple) (paradoxical), venous sinus
- Inflammation, inflamed, inflammatory (with exudation), vein, intracranial or intraspinal (septic)
- Phlebitis (infective) (pyemic) (septic) (suppurative), intracranial (venous) sinus (any)
- Phlebitis (infective) (pyemic) (septic) (suppurative), intraspinal venous sinuses and veins
- Thrombophlebitis, cavernous (venous) sinus
- Thrombophlebitis, cerebral (sinus) (vein)
- Thrombophlebitis, intracranial venous sinus (any)
- Thrombophlebitis, intraspinal venous sinuses and veins
- Thrombophlebitis, lateral (venous) sinus
- Thrombophlebitis, longitudinal (venous) sinus