DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

G09 diagnosis code · Billable category · FY2027

G09 Sequelae of inflammatory diseases of central nervous system

  • Billable
  • Not CC/MCC
  • POA reported

G09 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

  1. Chapter 6 Diseases of the nervous system (G00-G99)
  2. G00-G09 Inflammatory diseases of the central nervous system (G00-G09)
  3. G09 Sequelae of inflammatory diseases of central nervous system
CC / MCC
Neither
MS-DRG
091-093
HCC V28
–
POA
Reported
Code Editor
–
Index entries
14

Instructions

At G09

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 G00 G08

Code first

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

Notes that also apply

Chapter 6 instructions (Excludes2 8): printed on the chapter 6 page.

Index entries

  • Parencephalitissequelae → G09
  • Sequelae (of)abscess, intracranial or intraspinal (conditions in G06) → G09
  • Sequelae (of)encephalitis or encephalomyelitis (conditions in G04) → G09
  • Sequelae (of)infection, pyogenic, intracranial or intraspinal → G09
  • Sequelae (of)phlebitis or thrombophlebitis of intracranial or intraspinal venous sinuses and veins (conditions in G08) → G09
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)cerebellum, cerebellarsequelae → G09
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)cerebral (embolic)sequelae → G09
  • Sequelae (of)meningitisbacterial (conditions in G00) → G09
  • Sequelae (of)meningitisother or unspecified cause (conditions in G03) → G09
  • Suppuration, suppurativebrainsequelae → G09
  • Thrombophlebitiscerebral (sinus) (vein)sequelae → G09
  • Thrombophlebitisintracranial venous sinus (any)sequelae → G09
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)extraduralbrainsequelae → G09
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)subduralbrainsequelae → G09

NCHS Alphabetic Index. Index first, then the Tabular List.

Medicare grouping and edits

CMS files for G09
CC / MCCNeither
Appendix BMDC 01 Diseases and Disorders of the Nervous System, MS-DRG 091-093 (Other Disorders of Nervous System with MCC…)
Code Editor–
POAReported
HCC V28–

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy