ICD-10-CM 2027
ICD-10 code for subarachnoid abscess
Extradural and subdural abscess, unspecified
From the official ICD-10-CM alphabetic index entry “Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › subarachnoid”. Page updated September 29, 2026.
About coding subarachnoid abscess
The ICD-10-CM code for subarachnoid abscess is G06.2 (Extradural and subdural abscess, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G06.2.
Within G06, choose G06.2 (Extradural and subdural abscess, unspecified) only when documentation doesn't support a more specific option: intracranial abscess and granuloma (G06.0) and intraspinal abscess and granuloma (G06.1).
Use an additional code (B95-B97) to identify infectious agent.
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific subarachnoid abscess codes (official index)
Common questions about subarachnoid abscess ICD-10 codes
What is the ICD-10 code for subarachnoid abscess?
- G06.2 — Extradural and subdural abscess, unspecified. More specific codes apply when the documentation supports them: G06.0, G06.1.
What is the ICD-10 code for brain subarachnoid abscess?
- G06.0 — Intracranial abscess and granuloma.
What is the ICD-10 code for spinal cord subarachnoid abscess?
- G06.1 — Intraspinal abscess and granuloma.
Is G06.2 billable?
- Yes. G06.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G06.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G06.2 as a principal diagnosis.
Is G06.2 a CC or MCC?
- G06.2 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.