ICD10BillableValid for clinical use
ICD-10 Code G09: Sequelae of inflammatory diseases of central nervous system
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 sequelae of inflammatory diseases of central nervous system 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
Applicable to
- condition resulting from (sequela) of inflammatory diseases of central nervous system
Code first
- condition resulting from (sequela) of inflammatory diseases of central nervous system
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 elsewherecodeG08Intracranial and intraspinal phlebitis and thrombophlebitiscode
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 elsewherebillableG08Intracranial and intraspinal phlebitis and thrombophlebitisbillable
Coverage-related procedures and services
CPT 72126high
COMPUTED TOMOGRAPHY, CERVICAL SPINE; WITH CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 72125high
COMPUTED TOMOGRAPHY, CERVICAL SPINE; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 72127high
COMPUTED TOMOGRAPHY, CERVICAL SPINE; WITHOUT CONTRAST MATERIAL, FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SECTIONS
Source: CMS coverage guidance
CPT 70460high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70450high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 70470high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL, FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SECTIONS
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 192775006high
Late effects of intracranial abscess or pyogenic infection
Source: SNOMED International ICD-10 map
SNOMED_CT 109903009high
Late effects of pyogenic intracranial abscess
Source: SNOMED International ICD-10 map
SNOMED_CT 429438008high
Sequela of infectious meningitis
Source: SNOMED International ICD-10 map
SNOMED_CT 194457007high
Sequelae of inflammatory diseases of the central nervous system
Source: SNOMED International ICD-10 map
SNOMED_CT 404188001high
Sequelae of meningitis
Source: SNOMED International ICD-10 map
SNOMED_CT 348501000119108high
Atrophy of left optic nerve following inflammation
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
G09
Common synonyms
Sequelae of inflammatory diseases of central nervous system
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.