Request / Find a Test Tool

The National Genomic Test Directories specify which genomic tests are commissioned by the NHS in England, to be delivered by Genomic Laboratory Hubs.

This tool allows clinical teams to search all of the genomic tests available to patients through the National Testing Directory. From here you can find out more details about each test and information about how to order them. These tests can only be ordered by clinical teams, if you are a patient looking to request a test please speak to your clinical team directly.


Clinical Indication ID & Name



Test Group


Test code


Test name


Target genes


Test scope


Test method/ technology

Single gene sequencing >=10 amplicons

Optimal Family Structure


Eligibility Criteria

A confident clinical diagnosis of CADASIL (cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy) including:
Cerebral ischaemic event below age of 50 or >50 if with a family history of dementia/migraine, AND one or more of:
1. Cognitive impairment with recurrent ischaemic attacks, OR
2. Subcortical lacunar lesions on MRI scan in white matter

Commissioning group


Overlapping idications

• R58 Adult onset neurodegenerative disorder test should be used in atypical cases where a broader differential diagnosis is under consideration

Address for samples/request forms

North Thames GLH, Rare & Inherited Disease Genomic Laboratory
Specimen Reception, Level 5 Barclay House, 37 Queen Square,
London WC1N 3BH

Contact with queries

Supporting documents


Education resources


Service updates


Request form download

Consent record

See consent guidance in test request form

Sample requirements

See sample guidance in test request form