Intracranial and Intraspinal Phlebitis ICD-10-CM Coding

ICD-10-CM Code For Intracranial And Intraspinal Phlebitis And Thrombophlebitis: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group G08 includes intracranial and intraspinal phlebitis and thrombophlebitis, covering inflammation and thrombosis of intracranial and spinal venous structures. These ICD-10-CM diagnosis codes are used to document clinical encounters involving venous inflammation or thrombotic complications within the central nervous system, capturing disease severity, anatomic involvement, and associated complications. Accurate coding within the ICD-10-CM G08 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM G08: Intracranial And Intraspinal Phlebitis And Thrombophlebitis Overview

This group represents inflammation and thrombosis of veins within the cranial cavity and spinal canal affecting the central nervous system vasculature. It targets intracranial and intraspinal venous structures and related sequelae such as venous infarction or increased intracranial pressure. Accurate coding is important for complete clinical documentation and supports appropriate reimbursement for services related to diagnosis and management.

When to Use

Use a code from this group when a clinician documents intracranial or intraspinal phlebitis or thrombophlebitis confirmed by clinical evaluation, imaging, or intraoperative findings. Codes from this group are appropriate when coding encounters that address venous inflammation or thrombotic processes involving the central nervous system.

ICD-10-CM Code	Description
G08	Intracranial and intraspinal phlebitis and thrombophlebitis

ICD-10-CM Code

Description

G08

Intracranial and intraspinal phlebitis and thrombophlebitis

DRG Codes

5 rows

DRG Code	Description
023	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
024	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
091	Other Disorders of Nervous System with MCC
092	Other Disorders of Nervous System with CC
093	Other Disorders of Nervous System without CC/MCC

Typical Clinical Scenarios

A previously healthy young adult presents to the emergency department with sudden severe headache, fever, focal neurologic deficits, and seizures after several days of sinusitis symptoms; magnetic resonance venography demonstrates thrombosis and inflammation of a cerebral cortical vein. The acute presentation with radiographic evidence of intracranial venous thrombosis and phlebitis prompts assignment of the intracranial/intraspinal phlebitis and thrombophlebitis code. Typical codes: G08.
An elderly patient with a history of recent lumbar spine surgery reports progressive back pain, fever, and new lower extremity weakness; spinal MRI shows enhancement along epidural veins consistent with thrombophlebitis extending intraspinally. Because the infection/inflammation involves the intraspinal venous structures and is identified as phlebitis/thrombophlebitis, the appropriate diagnosis from this group is used for inpatient management and documentation. Typical codes: G08.
A hospitalized patient with active systemic bacteremia and hypercoagulable state develops altered mental status and focal signs; neuroimaging reveals septic thrombophlebitis of dural sinuses as a complication of the systemic infection. When venous inflammation and thrombosis within the cranial vault are documented as a complication or comorbidity of the primary infection, the intracranial phlebitis/thrombophlebitis code is reported to capture that condition. Typical codes: G08.

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

ICD-10-CM Code	Description
G08	Intracranial and intraspinal phlebitis and thrombophlebitis

A previously healthy young adult presents to the emergency department with sudden severe headache, fever, focal neurologic deficits, and seizures after several days of sinusitis symptoms; magnetic resonance venography demonstrates thrombosis and inflammation of a cerebral cortical vein. The acute presentation with radiographic evidence of intracranial venous thrombosis and phlebitis prompts assignment of the intracranial/intraspinal phlebitis and thrombophlebitis code. Typical codes: G08.
An elderly patient with a history of recent lumbar spine surgery reports progressive back pain, fever, and new lower extremity weakness; spinal MRI shows enhancement along epidural veins consistent with thrombophlebitis extending intraspinally. Because the infection/inflammation involves the intraspinal venous structures and is identified as phlebitis/thrombophlebitis, the appropriate diagnosis from this group is used for inpatient management and documentation. Typical codes: G08.
A hospitalized patient with active systemic bacteremia and hypercoagulable state develops altered mental status and focal signs; neuroimaging reveals septic thrombophlebitis of dural sinuses as a complication of the systemic infection. When venous inflammation and thrombosis within the cranial vault are documented as a complication or comorbidity of the primary infection, the intracranial phlebitis/thrombophlebitis code is reported to capture that condition. Typical codes: G08.

ICD-10-CM Code For Intracranial And Intraspinal Phlebitis And Thrombophlebitis: Group Overview

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ICD-10-CM G08: Intracranial And Intraspinal Phlebitis And Thrombophlebitis Overview

ICD-10-CM Code For Intracranial And Intraspinal Phlebitis And Thrombophlebitis: Group Overview

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ICD-10-CM G08: Intracranial And Intraspinal Phlebitis And Thrombophlebitis Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Intracranial And Intraspinal Phlebitis And Thrombophlebitis: Group Overview

Sign up for ICD-10-CM Code For Intracranial And Intraspinal Phlebitis And Thrombophlebitis: Group Overview policy alerts

ICD-10-CM G08: Intracranial And Intraspinal Phlebitis And Thrombophlebitis Overview

ICD-10-CM Code For Intracranial And Intraspinal Phlebitis And Thrombophlebitis: Group Overview

Sign up for ICD-10-CM Code For Intracranial And Intraspinal Phlebitis And Thrombophlebitis: Group Overview policy alerts

ICD-10-CM G08: Intracranial And Intraspinal Phlebitis And Thrombophlebitis Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

What diagnosis does ICD-10-CM code group G08 represent?

How does accurate coding in group `G08` support reimbursement?

Which DRGs are related to diagnoses in the `G08` group?

What clinical sequelae are captured by the `G08` diagnosis group?

When should a provider or coder select code `G08`?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

What diagnosis does ICD-10-CM code group G08 represent?

How does accurate coding in group `G08` support reimbursement?

Which DRGs are related to diagnoses in the `G08` group?

What clinical sequelae are captured by the `G08` diagnosis group?

When should a provider or coder select code `G08`?

References