ICD-10 G08
Billable / Specific MCCIntracranial and intraspinal phlebitis and thrombophlebitis
About ICD-10-CM G08
ICD-10-CM code G08 represents Intracranial and intraspinal phlebitis and thrombophlebitis. This is a billable/specific code in the Nervous System chapter (block G08). The 2026 edition of ICD-10-CM G08 became effective on October 1, 2025.
Coding Tips for G08
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
G08 is designated MCC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-MCC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag MCC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under G08. Per CMS ICD-10-CM Tabular 2026.
- 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
Type 1 Excludes
Pure excludes, these codes can never be coded together with G08. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- 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)
Type 2 Excludes
Not included here, the excluded code is not part of G08, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
Inpatient DRG Impact, MCC
codes Intracranial and intraspinal phlebitis and thrombophlebitis. As a Major Complication/Comorbidity (MCC), this can shift the DRG assignment to a higher-weighted category, substantial reimbursement impact.
Medicare LCD Coverage for G08
Local Coverage Determinations (LCDs) from CMS MACs that list G08 as a covered diagnosis.
Showing top 10 of 141 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G08.
5 Medicare
CPT Codes Commonly Billed with G08
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert G08 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| G08 | 325 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G08
Other codes in section G00-G09 (Inflammatory diseases of the central nervous system).
ICD-10 G08, Billing FAQ
Is ICD-10 code G08 billable? +
Yes, G08 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to G08? +
ICD-10 G08 includes: 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, and 2 more clinical synonyms.
What codes are Type 1 Excludes for G08? +
Type 1 Excludes (never code 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)
What codes are Type 2 Excludes for G08? +
Type 2 Excludes (may be coded together when both conditions exist): intracranial phlebitis and thrombophlebitis complicating nonpyogenic intraspinal phlebitis and thrombophlebitis (G95.1)
Is G08 a CC or MCC for inpatient DRG? +
Yes, this code is designated as MCC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does G08 map to? +
Per CMS GEMs, G08 maps to ICD-9 codes: 325. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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