What does ICD-10 code G08 mean?

G08 is the ICD-10-CM diagnosis code for Intracranial and intraspinal phlebitis and thrombophlebitis. Intracranial and intraspinal phlebitis and thrombophlebitis

Is G08 a billable ICD-10 code?

Yes, G08 is a billable ICD-10-CM code that can be used on medical claims.

What chapter is G08 in?

G08 is classified under Chapter 6: Diseases of the nervous system (G00-G99), Section G00-G09: Inflammatory diseases of the central nervous system (G00-G09).

What are the includes and excludes for G08?

Excludes1 (not coded here): intracranial phlebitis and thrombophlebitis complicating:; abortion, ectopic or molar pregnancy (O00-O07, O08.7); pregnancy, childbirth and the puerperium (O22.5, O87.3). Excludes2 (not included here): intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1).

G08 Intracranial and intraspinal phlebitis and thrombophlebitis

✓ Billable ICD-10-CM 2026

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The ICD-10-CM code for Intracranial and intraspinal phlebitis and thrombophlebitis is G08 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter: 6: Diseases of the nervous system (G00-G99)
Section: G00-G09: Inflammatory diseases of the central nervous system (G00-G09)
Category G08: 1 code (1 billable)
FY2026 Status: Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to G08:

Embolism (multiple) (paradoxical) › venous sinus
Thrombophlebitis › intraspinal venous sinuses and veins
Thrombophlebitis › cavernous (venous) sinus
Embolism (multiple) (paradoxical) › intraspinal venous sinuses or veins
Phlebitis (infective) (pyemic) (septic) (suppurative) › intraspinal venous sinuses and veins
Thrombophlebitis › intracranial venous sinus (any)
Thrombophlebitis › cerebral (sinus) (vein)
Phlebitis (infective) (pyemic) (septic) (suppurative) › intracranial (venous) sinus (any)

Excludes1

Not coded here. These conditions should NOT be coded together with G08.

intracranial phlebitis and thrombophlebitis complicating:
abortion, ectopic or molar pregnancy (O00-O07, O08.7)
pregnancy, childbirth and the puerperium (O22.5, O87.3)
nonpyogenic intracranial phlebitis and thrombophlebitis (I67.6)

Excludes2

Not included here. These conditions are coded elsewhere but may be coded together if applicable.

intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)

Inclusion Terms

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

U.S. Hospital Utilization

An estimated 10,030 U.S. inpatient stays in 2023 included G08 among the documented diagnoses.
2,395 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.a

Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026