Imperial Collage Healthcare

Results are communicated to clinical staff and are normally not communicated direct to patients either on telephone requests or in written report.

How can I obtain UKAS Accreditation information for North West London Pathology (NWLP) services?

NWLP operates UKAS accredited medical laboratories as per the references below. Please note that tests performed on site at West Middlesex University Hospital and Hillingdon Hospital are not accredited.

The current scope of accreditation for all NWLP's laboratories can be found on the UKAS website

See the following UKAS ref numbers:

  • Clinical Biochemistry Ref: 8673
  • Haematology and Blood Transfusion Ref: 8674
  • Infection & Immunity Sciences (Including Immunology, Virology, Microbiology and Histocompatibility and Immunogenetics ) Ref: 8659
  • Cellular Pathology (Including Histopathology, Cytology and Molecular Pathology) Ref: 9615


If you require copies of our certificate of accreditation and associated documentation please contact us using the Pathology Queries email address

UKAS requires the laboratories to be accredited for a particular repertoire/scope (ISO15189), any changes or additions to repertoire require assessment by UKAS (extension to scope). 

There are some assays performed by North West London Pathology laboratories that must be reported as not accredited for the one of the following reasons:

  1. The material tested does not come under the scope of the ISO standard 15189:2012 which pertains to the testing of material of human origin. 
  2. The reagent manufacturer and laboratory may be able to validate the performance of a particular test for some sample types but it is not feasible to validate the test for others because of insufficient data. 
  3. There may be insufficient mechanisms available for some less commonly performed tests in the form of external quality assurance schemes or independent quality control material to provide evidence to UKAS that the test performance meets the requirements of the ISO Standard.
  4. A new assay/test has been introduced and is awaiting assessment by UKAS (as described above).
  5. A change in equipment/methodology requires the laboratory to apply for an extension to scope to accreditation and the tests performed are awaiting assessment by UKAS (as described above).

Where an assay cannot be accredited, one of the following statements will appear in the Notes section of the test information in the Test Directory of the website. 

“The laboratory is not UKAS accredited for this test”

 “The laboratory is not UKAS accredited for this test for this sample type.”

“The laboratory is not UKAS accredited for this test due to a change in equipment/assay.”


Am I able to request results for my patient to be sent to me by email?

Yes, Clinicians can request for results to be sent by email. Please email your request to


How do I get clinical advice on test results for my patient?

Please contact the Pathology Call Centre during normal working hours on 0203 313 5353. Alternatively, see the Pathology User Guide for how to contact the relevant department.
If advice is not urgent you can also email your query to


How do I add a test request to a sample that has already been sent to the laboratory?

Additional tests may be added by discussion with the relevant laboratory. The time limit for adding additional tests to a sample already received in the laboratory will depend on the type of sample and the department it was sent to.


Where can I find test reference ranges and turnaround times for specific tests?

Information on the repertoire of tests performed by pathology, including reference ranges, turnaround times and specimen requirements, can be found in the test directory. 


When are the routine opening hours for the pathology services? 

All pathology laboratories provide a routine diagnostic service Monday to Friday 9am - 5pm (closing times can be later, all department opening hours are listed here). An emergency service is provided by Blood Sciences and Microbiology 24/7.

Who do I contact for specimen collection queries, such as a courier not arriving on time or samples that have missed regular transport?

If you are experiencing problems with pathology transport or couriers, please contact the Pathology Call Centre during normal working hours on 0203 313 5353 and your call will be redirected to the appropriate person or department. Alternatively email the Pathology Queries address.


Who should I contact about work experience or placements at North West London Pathology?

Unfortunately, we have a limited number of work experience or placement posts available. All vacancies, whether permanent posts or work experience and placements opportunities, are advertised on the NHS jobs website.


Where do I go to have my blood taken for testing? How do I find out information about phlebotomy services?

Pathology does not manage the blood tests/phlebotomy services.

For Imperial Hospital sites (Hammersmith, St Mary's and Charing Cross) - please see the Imperial Hospital website  for further details

For Hillingdon Hospitals - please see the Hillingdon Hospital website for further details

For Chelsea and Westminster and West Middlesex - please see the Chelsea and Westminster website for further details


How do I get a price list for tests performed at North West London Pathology?

Please contact Sonia de Castro, Business Support 

How do I set up a new Service Level Agreement with North West London Pathology?

Please contact Sonia de Castro, Business Support Co-ordinator:


Please contact us using the form below

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