Lab Order Request
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Lab Order Request
Nine tests, the Quest codes to order them, and what each one answers.
Patient: Annette Thompson. Prior draw: 2026-05-15 (Quest plus Cleveland HeartLab Cardio IQ). Requested: one early-morning fasted draw.
Quest codes are given so the requisition can be built directly. She pays out of pocket, so please order through whichever route prices lowest on your side.
The order
| # | Test | Quest code |
|---|---|---|
| 1 | Cardio IQ Apolipoprotein B | 91726 |
| 2 | Testosterone, Free (Dialysis), Total (MS) and SHBG | 37073 |
| 3 | Hepatic Function Panel | 10256 |
| 4 | OmegaCheck | 92701 |
| 5 | TSH | 899 |
| 6 | CBC with Differential and Platelets | 6399 |
| 7 | Cardio IQ hs-CRP | 91737 |
| 8 | Iron, TIBC and Ferritin Panel | 5616 |
| 9 | Estradiol | 4021 |
What each one answers
| Test | Clinical question | May baseline |
|---|---|---|
| ApoB | Response to rosuvastatin plus ezetimibe, both started 2026-06-20. Primary endpoint of this draw. | 126 mg/dL, LDL-P 2191 nmol/L |
| Hepatic panel | Statin safety monitoring. | AST 19, ALT 20 |
| Testosterone, SHBG | Dose tracking on injectable testosterone at a knowingly male-range level, prescribed for treatment-resistant depression and anhedonia. | Total 626 ng/dL, SHBG 58 nmol/L |
| Estradiol | HRT monitoring. | 181 pg/mL |
| CBC | Erythrocytosis follow-up. | Hgb 16.4 g/dL, Hct 49.1% |
| TSH | Second data point on a suppressed TSH with normal free T4 and free T3. Determines whether the stable thyroid nodule warrants further workup. | 0.27 mIU/L |
| Iron, TIBC, Ferritin | HFE C282Y management and ferritin recovery. | Ferritin 34 ng/mL |
| hs-CRP | Inflammation. | 2.7 mg/L |
| OmegaCheck | Omega-3 status. Relevant to APOE4 homozygous status. | 4.9%, target 5.5% or above |
Change from May: the testosterone code
May used Quest 14966, where free testosterone is calculated from total, SHBG and albumin. This order uses 37073, where free testosterone is measured by equilibrium dialysis, total stays on mass spectrometry, and SHBG is included.
Two consequences:
- The dialysis value is the more rigorous measurement.
- Because the methods differ, the first 37073 result resets the free-testosterone baseline rather than continuing the May trend line. Total testosterone and SHBG stay directly comparable.
37073 does not include bioavailable testosterone, which was 102.9 ng/dL in May. If you want that retained, 14966 is the code.
Dropped, in case you disagree
TMAO. Adjusting for renal function attenuates or reverses the TMAO to cardiovascular association, and her eGFR is 77, so an elevated result would be hard to attribute. She is also deliberately raising oily fish intake to lift OmegaCheck, which raises TMAO directly. No AHA or ACC recommendation for routine screening, and no established treatment target.
NT-proBNP and vitamin B6 (PLP), both on cost.
Preparation and reading notes
- Fasted, early morning. One draw covers all nine.
- Read hemoglobin and hematocrit against altitude-adjusted ranges. She lives at 7,700 feet, and sea-level ranges overstate the finding.
- Given HFE C282Y status and active ferritin recovery, therapeutic phlebotomy is not an appropriate response to the hematocrit.
- She has no health insurance. Every test is out of pocket, so cost is a real constraint on what goes on the requisition.
Test codes verified against the Quest Diagnostics test directory, 2026-08-10.
Published to Annette's hub. Rebuilt from the source markdown, so edit the source and rerun rather than editing this page.