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Human Reference Manual

  
5/22/26: Effective 8/23/24: Due to increased test volume, ZT4DIAL (FRT4D to Mayo Labs) is temporarily unavailable for ordering. Mayo's recommended alternative test id: FFT4F.
5/22/26: Effective 4/15/25: Per Mayo Labs the TSI test is delayed. Turnaround time is expected to be up to 20 days. An update will be provided when turnaround time returns to normal.
5/22/26: Effective 3/21/25 Test code BIOTESO (Mayo test code TTFB) is down for an undetermined timeframe. Order alternative test FFBTT.
5/22/26: Effective:1/15/26: Per Mayo Labs: Due to assay issues, results for CORTFSO (Mayo code CORTF) Cortisol Free Serum, will be delayed. Specimens may take up to 15 days to result. The duration of this delay may last one month or more
5/22/26: Effective 4/7/26: The following test codes will be delayed an additional two days due to analylzer issues: BL & CBL.
5/22/26: Effective 4/7/26: Per Mayo Labs: T3 (Triiodothyronine),Reverse, Serum test (T3RSO) is temporarily unorderable due to concerns around acceptable turnaround times.  Order MISC, in Cerner with Order Name: FRT3S to Mayo as an alternative.
5/22/26: Effective 4/10/26:  Per Mayo Labs:  Test results for Aldosterone, Serum, ALDSSO (Mayo test code: ALDS), may be delayed 5-7 days past the published TAT.  This delay is anticipated to be 2-4 weeks in duration..
5/22/26: Effective 4/20/26: Per WSLH: Published TAT for results to the Arbovirus IgM Ab Panel (ARBOMSO) may be extended an additional 10 days. West Nile Virus, St Louis Encephalitis and Eastern Equine Encephalitis will be performed by CDC
6/5/26: Effective: 6/3/26: Per Mayo Labs: Test results for Lipoprotein (a) Serum, LIPA1SO (Mayo test code LIPA1) may be delayed past the published turnaround time. The duration of the delay is expected to be another 1-2 months
6/5/26: Effective 6/3/26: Per Mayo Labs: Test results for Apolipoprotein B Serum, APOLBSO (Mayo test code APOLB) may be delayed past the published turnaround time. The duration of the delay is expected to be 1-2 months.
5/22/26: Effective 5/19/26: TGMSSO will have an indefinite extended turnaround times at Mayo Labs. Recommended Alt Test: Thyroglobulin LC/MS/MS Test ID: FQTHY at Mayo.
Effective 5/27/26: ALKPSO results will be delayed past the published turnaround time due to instrument issues. This delay is expected to last less than 7 days.
6/5/26:  Effective 6/4/26:  Per Mayo Labs Due to assay issues impacting IGF1SSO (Mayo Lab code IGF1S), testing will become non-orderable. Recommended alternative:  IGF, LC/MS.  Order Cerner test: MISC; Test ID:  FIGF1 to Mayo Labs
  
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Laboratory News Vol 43 No 10-November 2, 2020.pdfLaboratory News Vol 43 No 10-November 2, 2020
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Welcome to Marshfield Labs - Reference Services

Marshfield Labs Reference Diagnostics was established in 1973 to serve the needs of physicians throughout Wisconsin, Upper Michigan and Eastern Minnesota. We are a division of the Marshfield Clinic, a highly regarded private medical and research institution, located in Central Wisconsin.

As part of a large medical and research institution, we offer a comprehensive menu of laboratory tests. Our Research Foundation promotes the development of new assays; continually expanding our list of available tests. Guidance in interpretation and utilization of our extensive test menu is provided by our team of pathologists and PhDs.

Working together to meet your needs every day is the goal of our Marshfield Lab staff. We support diagnostic laboratory medicine by providing:

  • An extensive test menu of over 1000 clinical and anatomic tests procedures
  • Accurate and timely testing
  • Convenient pickup through ground and air courier services
  • Results when you need them online, fax, interfaced
  • Access to our service through our Web Portal

We look forward to working with you.

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