ICD10BillableValid for clinical use
ICD-10 Code G08: Intracranial and intraspinal phlebitis and thrombophlebitis
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).
When is it used?
- May be used when a clinician documents intracranial and intraspinal phlebitis and thrombophlebitis in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
6Diseases of the nervous system (G00-G99)
block
G00-G09Inflammatory diseases of the central nervous system
currentG00-G09
Official coding notes
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
Excludes1 (do not code together)
- 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 (may code together if documented)
- intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
NeurologistGeneral Physician
Related codes
G00Bacterial meningitis, not elsewhere classifiedcategoryG01Meningitis in bacterial diseases classified elsewherecodeG02Meningitis in other infectious and parasitic diseases classified elsewherecodeG03Meningitis due to other and unspecified causescategoryG04Encephalitis, myelitis and encephalomyelitiscategoryG05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewherecategoryG06Intracranial and intraspinal abscess and granulomacategoryG07Intracranial and intraspinal abscess and granuloma in diseases classified elsewherecodeG09Sequelae of inflammatory diseases of central nervous systemcode
Sibling codes
G00Bacterial meningitis, not elsewhere classifiedG01Meningitis in bacterial diseases classified elsewherebillableG02Meningitis in other infectious and parasitic diseases classified elsewherebillableG03Meningitis due to other and unspecified causesG04Encephalitis, myelitis and encephalomyelitisG05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhereG06Intracranial and intraspinal abscess and granulomaG07Intracranial and intraspinal abscess and granuloma in diseases classified elsewherebillableG09Sequelae of inflammatory diseases of central nervous systembillable
Coverage-related procedures and services
CPT 70545high
MAGNETIC RESONANCE ANGIOGRAPHY, HEAD; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70544high
MAGNETIC RESONANCE ANGIOGRAPHY, HEAD; WITHOUT CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70546high
MAGNETIC RESONANCE ANGIOGRAPHY, HEAD; WITHOUT CONTRAST MATERIAL(S), FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SEQUENCES
Source: CMS coverage guidance
CPT 70548high
MAGNETIC RESONANCE ANGIOGRAPHY, NECK; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70547high
MAGNETIC RESONANCE ANGIOGRAPHY, NECK; WITHOUT CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70549high
MAGNETIC RESONANCE ANGIOGRAPHY, NECK; WITHOUT CONTRAST MATERIAL(S), FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SEQUENCES
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 192759008high
Cerebral venous sinus thrombosis
Source: SNOMED International ICD-10 map
SNOMED_CT 230721009high
Cerebral venous thrombosis of sigmoid sinus
Source: SNOMED International ICD-10 map
SNOMED_CT 230720005high
Cerebral venous thrombosis of straight sinus
Source: SNOMED International ICD-10 map
SNOMED_CT 16418006high
Embolism of basilar sinus
Source: SNOMED International ICD-10 map
SNOMED_CT 23819000high
Embolism of cavernous venous sinus
Source: SNOMED International ICD-10 map
SNOMED_CT 56384000high
Embolism of inferior sagittal sinus
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
G08
Common synonyms
Intracranial and intraspinal phlebitis and thrombophlebitis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.