ICDcodes.org
FY2027

G09 — Sequelae of inflammatory diseases of central nervous system

Billable

Is G09 billable?

Yes — G09 is billable for FY2027. G09 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. G09 may be submitted for encounters from October 1, 2026 through September 30, 2027.

G09 at a glance

CodeG09
DescriptionSequelae of inflammatory diseases of central nervous system
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does G09 group to?

G09 sits in MDC 01 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 091Other Disorders of Nervous System with MCCmedical
  • 092Other Disorders of Nervous System with CCmedical
  • 093Other Disorders of Nervous System without CC/MCCmedical

How is G09 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to G09. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Parencephalitis › sequelae
  • Sequelae › abscess, intracranial or intraspinal (of)
  • Sequelae › encephalitis or encephalomyelitis (of)
  • Sequelae › infection, pyogenic, intracranial or intraspinal (of)
  • Sequelae › phlebitis or thrombophlebitis of intracranial or intraspinal venous sinuses and veins (of)
  • Abscess › cerebellum, cerebellar › sequelae (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
  • Abscess › cerebral › sequelae (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
  • Sequelae › meningitis › bacterial (of)
  • Sequelae › meningitis › other or unspecified cause (of)
  • Suppuration, suppurative › brain › sequelae
  • Thrombophlebitis › cerebral › sequelae
  • Thrombophlebitis › intracranial venous sinus › sequelae

Code first

The underlying condition below must be sequenced before G09. G09 describes a manifestation and cannot be the principal or first-listed diagnosis.

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

Note

  • 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.

Excludes2 — not included here — inherited from Chapter 6

The conditions below are not part of G09, but a patient may have both at the same time. When documentation supports it, G09 and the excluded code may both be reported.

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

How long has G09 existed?

G09 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which conditions are coded to G09?