2019 ICD-10-CM Diagnosis Code Q03.1

Atresia of foramina of Magendie and Luschka

    2016 2017 2018 2019 Billable/Specific Code POA Exempt
  • Q03.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM Q03.1 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of Q03.1 - other international versions of ICD-10 Q03.1 may differ.
Applicable To
  • Dandy-Walker syndrome
The following code(s) above Q03.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Q03.1:
  • Q00-Q99
    2019 ICD-10-CM Range Q00-Q99

    Congenital malformations, deformations and chromosomal abnormalities

    Note
    • Codes from this chapter are not for use on maternal records
    Type 2 Excludes
    • inborn errors of metabolism (E70-E88)
    Congenital malformations, deformations and chromosomal abnormalities
  • Q03
    ICD-10-CM Diagnosis Code Q03

    Congenital hydrocephalus

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Includes
    • hydrocephalus in newborn
    Type 1 Excludes
    • Arnold-Chiari syndrome, type II (Q07.0-)
    • acquired hydrocephalus (G91.-)
    • hydrocephalus due to congenital toxoplasmosis (P37.1)
    • hydrocephalus with spina bifida (Q05.0-Q05.4)
    Congenital hydrocephalus
Approximate Synonyms
  • Dandy-walker syndrome
Clinical Information
  • A congenital abnormality of the central nervous system marked by failure of the midline structures of the cerebellum to develop, dilation of the fourth ventricle, and upward displacement of the transverse sinuses, tentorium, and torcula. Clinical features include occipital bossing, progressive head enlargement, bulging of anterior fontanelle, papilledema, ataxia, gait disturbances, nystagmus, and intellectual compromise. (from menkes, textbook of child neurology, 5th ed, pp294-5)
  • A rare congenital brain malformation disorder characterized by agenesis or hypoplasia of the cerebellar vermis, cystic dilatation of the fourth ventricle, and enlargement of the posterior fossa.
  • Hydrocephalus, absence of the cerebellar vermis, and posterior fossa cyst continuous with the fourth ventricle are the main characteristics of this syndrome. About 4% of all cases of hydrocephalus are complicated by dws. Associated disorders may include aase-smith syndrome 1, aicardi, coffin-siris, cryptophthalmos, ehlers-danlos, ellis-van creveld, jones syndrome, joubert, ruvalcaba-myhre-smith, walker-warburg, meckel, ritscher-schinzel, and veradi syndromes. Dandy-walker syndrome associated with macrocephaly, facial anomalies, developmental delay, and brain stem dysgenesis inherited as an x-linked recessive trait was reported as a separate syndrome.
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • Q03.1 is considered exempt from POA reporting.
ICD-10-CM Q03.1 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 091 Other disorders of nervous system with mcc
  • 092 Other disorders of nervous system with cc
  • 093 Other disorders of nervous system without cc/mcc
  • 793 Full term neonate with major problems

Convert Q03.1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to Q03.1:

ICD-10-CM Codes Adjacent To Q03.1
Q00.2 Iniencephaly
Q01 Encephalocele
Q01.0 Frontal encephalocele
Q01.1 Nasofrontal encephalocele
Q01.2 Occipital encephalocele
Q01.8 Encephalocele of other sites
Q01.9 Encephalocele, unspecified
Q02 Microcephaly
Q03 Congenital hydrocephalus
Q03.0 Malformations of aqueduct of Sylvius
Q03.1 Atresia of foramina of Magendie and Luschka
Q03.8 Other congenital hydrocephalus
Q03.9 Congenital hydrocephalus, unspecified
Q04 Other congenital malformations of brain
Q04.0 Congenital malformations of corpus callosum
Q04.1 Arhinencephaly
Q04.2 Holoprosencephaly
Q04.3 Other reduction deformities of brain
Q04.4 Septo-optic dysplasia of brain
Q04.5 Megalencephaly
Q04.6 Congenital cerebral cysts

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.