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ICD-10-CM Codes
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2023 ICD-10-CM Diagnosis Code G91.1
2023 ICD-10-CM Diagnosis Code G91.1
Obstructive hydrocephalus
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
- G91.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2023 edition of ICD-10-CM G91.1 became effective on October 1, 2022.
- This is the American ICD-10-CM version of G91.1 - other international versions of ICD-10 G91.1 may differ.
The following code(s) above
G91.1 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
G91.1:
- Hydrocephalus, obstructive
ICD-10-CM G91.1 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
- 056 Degenerative nervous system disorders with mcc
- 057 Degenerative nervous system disorders without mcc
Convert G91.1 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
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
Code annotations containing back-references to G91.1:
- Block, blocked
- Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent) G91.9
ICD-10-CM Diagnosis Code G91.9
Hydrocephalus, unspecified
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
- Obstruction, obstructed, obstructive
- Occlusion, occluded
- Stenosis, stenotic (cicatricial) - see also Stricture
- aqueduct of Sylvius (congenital) Q03.0
ICD-10-CM Diagnosis Code Q03.0
Malformations of aqueduct of Sylvius
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code POA Exempt
Applicable To- Anomaly of aqueduct of Sylvius
- Obstruction of aqueduct of Sylvius, congenital
- Stenosis of aqueduct of Sylvius
- Stricture - see also Stenosis
- aqueduct of Sylvius (congenital) Q03.0
ICD-10-CM Diagnosis Code Q03.0
Malformations of aqueduct of Sylvius
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code POA Exempt
Applicable To- Anomaly of aqueduct of Sylvius
- Obstruction of aqueduct of Sylvius, congenital
- Stenosis of aqueduct of Sylvius
ICD-10-CM Codes Adjacent To G91.1
G90.521 Complex regional pain syndrome I of right lower limb
G90.522 Complex regional pain syndrome I of left lower limb
G90.529 Complex regional pain syndrome I of unspecified lower limb
G90.59 Complex regional pain syndrome I of other specified site
G90.8 Other disorders of autonomic nervous system
G90.9 Disorder of the autonomic nervous system, unspecified
G90.A Postural orthostatic tachycardia syndrome [POTS]
G91.0 Communicating hydrocephalus
G91.1
Obstructive hydrocephalus
G91.2 (Idiopathic) normal pressure hydrocephalus
G91.3 Post-traumatic hydrocephalus, unspecified
G91.4 Hydrocephalus in diseases classified elsewhere
G91.8 Other hydrocephalus
G91.9 Hydrocephalus, unspecified
G92.0 Immune effector cell-associated neurotoxicity syndrome
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
