DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

G00-G99 · FY2027

Chapter 6 Diseases of the nervous system (G00-G99)

Chapter 6 holds 68 categories in 11 blocks, with 700 billable codes in FY2027; none of them is new this year.

Blocks
11
Categories
68
Billable codes
700
New FY2027
0
Instructions
8

Blocks and categories

Chapter instructions

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