DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 6

G00-G09 Inflammatory diseases of the central nervous system (G00-G09)

Block G00-G09 groups 10 categories with 35 billable codes in FY2027.

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)

Neighbouring blocks

Categories
10
Billable codes
35
CC codes
3
MCC codes
31
HCC V28 codes
5
New FY2027
0

Categories in G00-G09

  • G00

    Bacterial meningitis, not elsewhere classified

    Meningoencephalitisinfluenzal (H. influenzae) → G00.0

    • 6 billable codes
    • 6 MCC
  • G01

    Meningitis in bacterial diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 MCC
  • G02

    Meningitis in other infectious and parasitic diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 MCC
  • G03

    Meningitis due to other and unspecified causes

    Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) → G03.9

    • 5 billable codes
    • 2 CC
    • 3 MCC
  • G04

    Encephalitis, myelitis and encephalomyelitis

    Hematomyelitis → G04.90

    • 14 billable codes
    • 1 CC
    • 13 MCC
    • 4 with HCC
  • G05

    Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

    Meningomyelitisin diseases classified elsewhere → G05.4

    • 2 billable codes
    • 2 MCC
    • 1 with HCC
  • G06

    Intracranial and intraspinal abscess and granuloma

    Granulomabrain (any site) → G06.0

    • 3 billable codes
    • 3 MCC
  • G07

    Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere

    –

    • Billable, no subdivisions
    • 1 MCC
  • G08

    Intracranial and intraspinal phlebitis and thrombophlebitis

    Thrombophlebitissinus (intracranial) → G08

    • Billable, no subdivisions
    • 1 MCC
  • G09

    Sequelae of inflammatory diseases of central nervous system

    Parencephalitissequelae → G09

    • Billable, no subdivisions

Index main terms

  • Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) → G00, G03 (50 entries)
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) → G06, G09 (28 entries)
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) → G04 (19 entries)
  • Encephalomyelitis → G04, G05 (14 entries)
  • Meningoencephalitis → G00, G04, G05 (10 entries)
  • Thrombophlebitis → G08, G09 (9 entries)
  • Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute) → G04, G05 (7 entries)
  • Sequelae (of) → G09 (6 entries)
  • Encephalopathy (acute) → G04 (5 entries)
  • Infection, infected, infective (opportunistic) → G04, G06 (5 entries)
  • Embolism (multiple) (paradoxical) → G06, G08 (4 entries)
  • Granuloma → G06 (4 entries)
  • Meningoencephalomyelitis → G04 (4 entries)
  • Complication(s) (from) (of) → G03, G04 (3 entries)
  • Leukoencephalitis → G04 (3 entries)

+13 more main terms; the search box finds them by word.

Block instructions

Notes that also apply

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