G09

Sequelae of inflammatory diseases of central nervous system

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 8 never code together

G00-G99chapter

Excludes2

certain conditions originating in the perinatal period (P04-P96)P04-P96
certain infectious and parasitic diseases (A00-B99)A00-B99
complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
neoplasms (C00-D49)C00-D49
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 2

G09code

Notes

Category G09 is to be used to indicate conditions whose primary classification is to G00-G08 as the cause of sequelae, themselves classifiable elsewhere. The 'sequelae' include conditions specified as residuals.G09 G09 G09 G00-G08 G00-G08 G00-G08

Code first

condition resulting from (sequela) of inflammatory diseases of central nervous system

Index entries leading here 5

Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- cerebellum, cerebellar G06.0
  - sequelae G09
- cerebral (embolic) G06.0
  - sequelae G09
- extradural G06.2
  - brain G06.0
    - sequelae G09
- subdural G06.2
  - brain G06.0
    - sequelae G09
Sequelae (of) — see also condition
- abscess, intracranial or intraspinal (conditions in G06) G09
- meningitis
  - bacterial (conditions in G00) G09
  - other or unspecified cause (conditions in G03) G09
- encephalitis or encephalomyelitis (conditions in G04) G09
- infection, pyogenic, intracranial or intraspinal G09
- phlebitis or thrombophlebitis of intracranial or intraspinal venous sinuses and veins (conditions in G08) G09
Suppuration, suppurative — see also condition
- brain G06.0
  - sequelae G09
Thrombophlebitis I80.9
- cerebral (sinus) (vein) G08
  - sequelae G09
- intracranial venous sinus (any) G08
  - sequelae G09
Parencephalitis — see also Encephalitis
- sequelae G09

Medications 3

693 Central Nervous System Diseases drugs 80 Central Nervous System Infections drugs 16 Autonomic Nervous System Diseases drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Block: G00-G09

Present FY2024–FY2027.