G91.9
BillableHydrocephalus, unspecified
Hydrocephalus, unspecified
Coding Notes
Includes
Conditions included under this code
- acquired hydrocephalus
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Also Known As / Clinical Terms
SNOMED CT
- Acquired hydrocephalus4088009
- Arrested hydrocephalus4113009
- Aqueduct of Sylvius anomaly25397008
- CSF - Cerebrospinal rhinorrhea85638002
- CSF - Cerebrospinal rhinorrhoea85638002
- Cerebrospinal fluid rhinorrhea85638002
- Cerebrospinal fluid rhinorrhoea85638002
- Cerebrospinal rhinorrhea85638002
- Cerebrospinal rhinorrhoea85638002
- Internal hydrocephalus128431009
- Hydrocephalus230745008
- Hydrocephaly230745008
- External hydrocephalus253132009
- Hydrocephalus with anomaly of aqueduct of Sylvius253133004
- Acquired hydrocephalus of newborn782432008
- Cerebrospinal fluid rhinorrhea due to hydrocephalus1259109009
- Cerebrospinal fluid rhinorrhoea due to hydrocephalus1259109009
- Cranial cerebrospinal fluid leak due to hydrocephalus1259542001
- Leak of cranial cerebrospinal fluid due to hydrocephalus1259542001
- Cranial cerebrospinal fluid fistula1259545004
- Cranial cerebrospinal fluid leak1259545004
- Leak of cranial cerebrospinal fluid1259545004
UMLS
- HydrocephalusC0020255
- Hydrocephalus (disorder)C0020255
- Hydrocephalus NOSC0020255
- Hydrocephalus, unspecifiedC0020255
- HydrocephalyC0020255
- Nonsyndromal hydrocephalusC0020255
- Too much cerebrospinal fluid in the brainC0020255
- Water on the brainC0020255
- hydrencephalusC0020255
- hydrencephalyC0020255
- hydrocephalusC0020255
- hydrocephalyC0020255
Frequently Asked Questions
What is ICD-10 code G91.9?
ICD-10-CM code G91.9 represents "Hydrocephalus, unspecified". It is a billable/specific code that can be used on a claim.
Is G91.9 a billable code?
Yes, G91.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is G91.9 in?
G91.9 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G91.9?
G91.9 has Excludes1 notes indicating codes that cannot be used together with it, including: Arnold-Chiari syndrome with hydrocephalus (Q07.-); congenital hydrocephalus (Q03.-); spina bifida with hydrocephalus (Q05.-).
What SNOMED CT codes does G91.9 map to?
G91.9 maps to 12 SNOMED CT concepts: 4088009, 782432008, 25397008, 4113009, 85638002, and 7 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for G91.9?
G91.9 is linked to 1 UMLS Concept Unique Identifier: C0020255. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.