Sequelae of inflammatory diseases of central nervous system (G09) ICD-10-CM
The G09 code range covers sequelae of inflammatory diseases of central nervous system with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- condition resulting from (sequela) of inflammatory diseases of central nervous system
Codes in the G09 Range 1 codes · 1 billable
- G09 Sequelae of inflammatory diseases of central nervous system
About the G09 Code Range
ICD-10 code G09 is used to identify the long-term effects that occur after inflammatory diseases of the central nervous system, such as meningitis or intracranial abscesses. This code captures the ongoing health issues that may develop once the initial infection has cleared.
This code covers a range of conditions including sequelae like hydrocephalus following infectious disease, postinfectious hydrocephalus, and secondary tic disorders that arise after encephalitic syndromes. Common synonyms such as "late effects of pyogenic intracranial abscess," "obstructive hydrocephalus due to meningitis," and "sequela of infectious meningitis" all correspond to G09. Understanding these terms helps medical coders accurately use the ICD-10 code for sequelae of inflammatory diseases of the central nervous system, ensuring precise documentation of complications that persist after infections resolve. This coding is essential for capturing the full medical impact of central nervous system infections beyond the acute phase.
Questions About This Page
How many billable codes are in the G09 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the G09 range classify?
The range classifies sequelae of inflammatory diseases of central nervous system. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
