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Human Reference Manual

  
04/7/26: 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.
04/7/26: 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.
04/7/26: Effective 3/21/25 Test code BIOTESO (Mayo test code TTFB) is down for an undetermined timeframe. Order alternative test FFBTT.
04/7/26: Effective 10/10/25: Due to assay issues TGMSSO (TGMS to Mayo), results will be delayed. Specimens may take up to 12 days to result. Delay expected to last 3 weeks or more.
04/7/26: 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
4/7/26: Effective 12/12/25: Per Mayo Labs: Reagent performance issues continue to extend turnaround times for the Antimicrobial Susceptibility Panel, Yeast, Varies (MMLYP) test. Reports will be available in 3-21 days. Delay duration is unknown.
04/7/26: MMLYP delay (continued): Amphotericin B for Candida glabrata isolates cannot be reported at this time. Expected to last 2-3 months. If warranted, testing can be ordered and forwarded to UT Health Ctr San Antonio (test code: FAMBS)
04/7/26: Effective 03/20/26: Per Mayo Labs: Due to technical issues, turnaround times have been temporarily extended for the Q10RTSO (Mayo Code Q10), Coenzyme Q10, Reduced and Total test.
4/7/26: Effective 4/7/26: The following test codes will be delayed an additional two days due to analylzer issues: BL & CBL.
4/8/26: 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.
  
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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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