G09 ICD-10-CA code: Sequelae of inflammatory diseases of central nervous system
G09 is the ICD-10-CA code for “Sequelae of inflammatory diseases of central nervous system” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G09Sequelae of inflammatory diseases of central nervous system
Short description: Sequelae of inflammatory diseases of CNS
ICD-10-CA · Canada
Index terms
Entries in CIHI’s alphabetical index that lead to G09. Searching the index by the condition the note names is how coders reach this code.
- Sequelae (of), myelitis
- Sequelae (of), infection, pyogenic, intracranial or intraspinal
Notes for G09
As CIHI prints them, with any note G09 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 6: Diseases of the nervous system (G00-G99)
Note
- Category G09 is to be used to indicate conditions whose primary classification is to G00-G08 (i.e. excluding those marked with an asterisk (*)) as the cause of sequelae, themselves classifiable elsewhere. The "sequelae" include conditions specified as such or as late effects, or those present one year or more after onset of the causal condition. For use of this category reference should be made to the relevant morbidity and mortality coding rules and guidelines. Not to be used for chronic inflammatory diseases of the central nervous system. Code these to current inflammatory diseases of the central nervous system.
Where G09 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G00-G09Inflammatory diseases of the central nervous system
- 3Valid code G09Sequelae of inflammatory diseases of central nervous system
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code G09 mean?
G09 is the ICD-10-CA code for “Sequelae of inflammatory diseases of central nervous system” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G09 in ICD-10-CA?
G09 sits under G00-G09 Inflammatory diseases of the central nervous system, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G09?
ICD-10-CA lists Note, Excludes notes for G09, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside G09
View G00-G09G00Bacterial meningitis, not elsewhere classifiedG01Meningitis in bacterial diseases classified elsewhereG02Meningitis in other infectious and parasitic diseases classified elsewhereG03Meningitis 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 elsewhereG08Intracranial and intraspinal phlebitis and thrombophlebitis