Intracranial and intraspinal phlebitis and thrombophlebitis
In Inflammatory diseases of the central nervous system (G00-G09), chapter 6: Diseases of the Nervous System
- G08 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under G00-G09 below.
- As a secondary diagnosis it is an MCC (major complication), which can raise the MS-DRG payment. It doesn't count when the principal diagnosis is one of 72 closely related codes.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as chronic: expected to last 12 months or longer and to limit daily life or need ongoing care.
- 75 US deaths in 2024 had an underlying cause in category G08, per the National Vital Statistics System on CDC WONDER. Death records use WHO ICD-10, so the count is for the whole category.
Also indexed as: Embolism, intracranial, venous sinus; Embolism, intraspinal venous sinuses or veins; Embolism, venous sinus; Inflammation, vein, intracranial or intraspinal; Phlebitis, intracranial sinus; Phlebitis, intraspinal venous sinuses and veins; Thrombophlebitis, cavernous sinus; Thrombophlebitis, cerebral; Thrombophlebitis, intracranial venous sinus; Thrombophlebitis, intraspinal venous sinuses and veins; Thrombophlebitis, lateral sinus; Thrombophlebitis, longitudinal sinus; Thrombophlebitis, sinus; Thrombosis, intraspinal venous sinuses and veins
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Instructional notes
Includes: conditions that are coded here
- 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: not coded here, use a different code
Excludes2: not included here, code separately if applicable
- intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
Other codes under G00-G09
Inflammatory diseases of the central nervous system (G00-G09)
- G00Bacterial meningitis, not elsewhere classified
- G01Meningitis in bacterial diseases classified elsewhere
- G02Meningitis in other infectious and parasitic diseases classified elsewhere
- G03Meningitis due to other and unspecified causes
- G04Encephalitis, myelitis and encephalomyelitis
- G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
- G06Intracranial and intraspinal abscess and granuloma
- G07Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
- G08Intracranial and intraspinal phlebitis and thrombophlebitis(this code)
- G09Sequelae of inflammatory diseases of central nervous system
G08 MS-DRGs
As the principal diagnosis, G08 groups to MS-DRG 023, 024, 091, 092, or 093 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 023 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
- DRG 024 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
- DRG 091 Other Disorders of Nervous System with MCC
- DRG 092 Other Disorders of Nervous System with CC
- DRG 093 Other Disorders of Nervous System without CC/MCC
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
G08 is in Other nervous system disorders (neither hereditary nor degenerative) (NVS020, its default category), with 111 codes. Others in it:
- A17.89 Other tuberculosis of nervous system
- A17.9 Tuberculosis of nervous system, unspecified
- B27.01 Gammaherpesviral mononucleosis with polyneuropathy
- B27.11 Cytomegaloviral mononucleosis with polyneuropathy
- B27.81 Other infectious mononucleosis with polyneuropathy
- B27.91 Infectious mononucleosis, unspecified with polyneuropathy
- E08.40 Diabetes mellitus due to underlying condition with diabetic neuropathy, unspecified
- E08.44 Diabetes mellitus due to underlying condition with diabetic amyotrophy
Medicare coverage articles listing G08
These 5 Medicare billing and coding articles list G08 as a diagnosis that supports medical necessity for the services they cover. From the CMS Medicare Coverage Database; check your own contractor's article before billing.
Other codes that refer to G08
Notes on these codes point to G08.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Brain Diseases
Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body. Your nerves take in information from your senses and send it to the brain to be processed. Your brain and nerves also communicate to help you move and to control your body's functions.
Read more about brain diseases on MedlinePlusSpinal Cord Diseases
Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body and your brain. It is protected by your vertebrae, which are the bone disks that make up your spine. If you have an accident that damages the vertebrae or other parts of the spine, this can also injure the spinal cord. Other spinal cord problems include:
Read more about spinal cord diseases on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 325 Phlebitis and thrombophlebitis of intracranial venous sinuses