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Human Reference Manual

  
12/1/2025: Effective 12/14/23 CLONSO (CZPS to Mayo) is non-orderable due to instrument issues and assay redevelopment. Recommended alternative: Clonazepam and Metabolite, Serum. TEST ID: FCLMS to Mayo ordered as a MISC in Cerner.
12/1/2025: 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.
12/1/25: 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.
12/1/25: Effective 7/8/25: Per Mayo Labs HIVDRSO is down and no longer orderable due to reagent issues, the recommended alternative is Ref Lab Code 3003853.
12/1/25: Test code BIOTESO (Mayo test code TTFB) is down for an undetermined timeframe. Order alternative test FFBTT.
12/1/25: Effective 10/08/25 DIASO (DIA to Mayo) is non-orderable due to unexpected analytic issues. Recommended alternative Test ID: ZW86 Referral Lab Code: 1501SP to Mayo ordered as MISC in Cerner.
12/1/25: 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.
12/1/25: Effective 10/17/25: The following beta-lactam combination antimicrobials will not be reported at this time due to manufacture quality control errors: Ceftazidime/avibactam, Imipenem/relebactam, Ceftolozane/tazobactam, Meropenem/vaborbactam.
12/1/25: Effective 10/17/25: (Continued) Organisms impacted are clinically significant aerobic Gram-negative rods. If requested, isolate will be sent to Mayo Laboratories for further evaluation.
12/1/25: Effective 11/24/25: AMASO is non-orderable due to reagent supply issues. This down is expected to last 30-45 days. Recommended alternative test: Mitochondrial (M2) Antibody; Test ID: FMMA2
Effective 12/4/25: SYPHAB is delayed. Testing is expected to resume midday on 12/5.
  
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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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