DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Q01 Encephalocele

  • Header · not billable

Q01 is not billable. The category heads 5 billable codes in FY2027: the 5 codes directly below it.

Index → code

Where it sits

  1. Chapter 17 Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
  2. Q00-Q07 Congenital malformations of the nervous system (Q00-Q07)
  3. Q01 Encephalocele
Billable codes
5
Subdivisions
5
CC / MCC codes
5 / 0
HCC V28 codes
5
New FY2027
0
Index entries
9

Codes in Q01

  1. Q01.0
    Frontal encephalocele
    BillableCC182Exempt
  2. Q01.1
    Nasofrontal encephalocele
    BillableCC182Exempt
  3. Q01.2
    Occipital encephalocele
    BillableCC182Exempt
  4. Q01.8
    Encephalocele of other sites
    BillableCC182Exempt
  5. Q01.9
    Encephalocele, unspecified
    BillableCC182Exempt

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At Q01

Includes

  • Arnold-Chiari syndrome, type III
  • encephalocystocele
  • encephalomyelocele
  • hydroencephalocele
  • hydromeningocele, cranial
  • meningocele, cerebral
  • meningoencephalocele

Excludes1

  • Meckel-Gruber syndrome (Q61.9) Q61.9

Notes that also apply

Chapter 17 instructions (Notes 1, Excludes2 1): printed on the chapter 17 page.

Index entries

  • Encephalocele → Q01.9
  • Podencephalus → Q01.9
  • Encephalocelefrontal → Q01.0
  • Encephalocelenasofrontal → Q01.1
  • Encephaloceleoccipital → Q01.2
  • Encephalocelespecified NEC → Q01.8
  • Sinuspericranii → Q01.9
  • Hernia, hernial (acquired) (recurrent)cerebral, congenitalendaural → Q01.8
  • Hernia, hernial (acquired) (recurrent)foramen magnumcongenital → Q01.8

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

Hierarchy