Clinical calculator summary
OPTN Calculated MELD 3.0
Clinical calculator summary
OPTN Calculated MELD 3.0
Calculates only the OPTN policy equation using official raw laboratory ranges, exact unit normalization, policy floors and caps, source-defined assessment-age and waitlist-pathway branch selection, and the explicit OPTN sex-for-adult-MELD selection.
Evidence-based context for fast calculator use
- Purpose:
- Strict U.S. OPTN Calculated MELD 3.0 implementation under Policy 9.1.D for candidates age 12 or older.
- Population:
- patients undergoing liver-function, hepatocellular carcinoma staging, imaging, or transplant assessment
- Factors:
- Age at assessment, Current waitlist pathway, Sex for the adult MELD equation, Laboratory unit system, Total bilirubin, INR, Serum creatinine, Serum sodium
OPTN Calculated MELD 3.0
MELD applies at age 12 or older. Exact date of birth is not needed for this policy branch.
Clinical Context & Background
Adult branch: 1.33F + 4.56ln(B) + 0.82(137-Na) - 0.24(137-Na)ln(B) + 9.09ln(INR) + 11.14ln(C) + 1.85(3.5-A) - 1.83(3.5-A)ln(C) + 6. Adolescent or continuously-listed-since-before-18 branch: omit 1.33F and use +7.33.Reference Data
| Policy element | Implemented rule |
|---|---|
| Adult branch | Age 18+ and registered/re-listed at 18+, or hypothetical assessment; explicit male/female selection; +1.33 only for female |
| Adolescent branch | Age 12–17, or age 18+ with continuous listing since before 18; no sex term; constant 7.33 |
| Policy handling | B/INR/C floor 1; C cap or dialysis set 3; Na 125-137; albumin 1.5-3.5 |
| Output | Full-precision natural logs; raw score clamped 6-40; nearest whole integer |
Clinical Workflow
Use, Interpret, And Continue The Patient Pathway
Expand for workflow guidance, limitations, examples, and related next steps.
Clinical Workflow
Use, Interpret, And Continue The Patient Pathway
Expand for workflow guidance, limitations, examples, and related next steps.
When To Use
- Use OPTN Calculated MELD 3.0 when strict U.S. OPTN Calculated MELD 3.0 implementation under Policy 9.1.D for candidates age 12 or older.
- Confirm that the patient, diagnosis, disease phase, and available inputs match the cited model before calculation.
How To Interpret
- Interpret the displayed result using the calculator-specific formula and reference table, spanning Adult branch through Output.
- A boundary result should prompt input verification and clinical review rather than false precision.
What To Do Next
- Integrate liver reserve, portal hypertension, tumor burden, vascular invasion, extrahepatic disease, performance status, and transplant policy.
- Document the inputs, result, timing, and clinical context so the assessment can be reproduced.
Limitations
- Liver function, HCC stage, imaging category, and transplant criteria are complementary but not interchangeable.
- The result supports clinician judgment and does not independently determine treatment.
Validated Population
patients undergoing liver-function, hepatocellular carcinoma staging, imaging, or transplant assessment
How to apply this result
For a representative case, verify Age at assessment, Current waitlist pathway, Sex for the adult MELD equation, calculate the result, and confirm that its classification matches the highlighted reference band before continuing the disease-specific pathway.
Calculation verification history
Verified
Calculation verification history
Verified: Production browser revalidation
- Three source-backed cases passed through visible production controls across the under-12 PELD boundary and adult male/female reference profiles.
- The former hidden-laboratory rejection, unsupported generic risk gauge, and generic outside-scope trace were absent; male and female results matched 25 and 26 with the expected 1.33 female term.
- No unexpected N/A, stale control, literal undefined/null value, or visible error boundary was observed.
Case-level evidence is retained in validation/browser-revalidation/meld-liver-transpplant-2026-08-03.json.
: Age and waitlist-pathway input simplification
- Replaced date of birth, registration date, and calculation date with age-at-assessment and current-waitlist-pathway choices that map directly to the two Policy 9.1.D equation branches.
- Added progressive disclosure: candidates under 12 stop at the PELD boundary, ages 12–17 use the adolescent branch, and adults identify whether the current listing began before age 18.
- No MELD coefficient, laboratory range, floor, cap, dialysis rule, sex term, rounding rule, or result interpretation changed.
: Calculation/input correction
- Replaced the original-MELD/defaulting implementation with strict OPTN Calculated MELD 3.0.
- Added exact policy ranges and clamps, both registration-age branches, explicit adult MELD sex selection, complete dialysis criteria, and no intermediate rounding.
: Content reconciliation
- Removed MELD-Na-as-current, mortality-band, treatment, and direct waitlist-priority claims from this route and direct panel content.
- The liver panel now uses the canonical child engine and remains In review.
: Full validation
- Dedicated deterministic implementation verification passed 302/302 assertions with zero formula difference.
- This is software implementation verification, not independent clinical validation.
Superseded by the latest report.
Verification confirms the calculator implementation against the cited model; it is not independent clinical validation, regulatory approval, or medical advice.
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Frequently Asked Questions
When should OPTN Calculated MELD 3.0 be used?
Use it for patients undergoing liver-function, hepatocellular carcinoma staging, imaging, or transplant assessment when all required inputs and the intended clinical setting are confirmed.
Can OPTN Calculated MELD 3.0 determine treatment by itself?
No. Interpret the result with the cited evidence, complete clinical assessment, current guidelines, and patient-specific goals.
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