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MELD-Na Score Calculator (OPTN/UNOS 2016)
x402
MELD-Na Score Calculator (OPTN/UNOS 2016) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Calculates the OPTN/UNOS 2016 MELD-Na score from creatinine, bilirubin, INR, sodium, and dialysis status using the published deterministic formula.
Price / call$0.005
Success—
StatusUnknown
How this service works
OPTN/UNOS 2016 MELD-Na from creatinine, bilirubin, INR, sodium, and dialysis. Deterministic published score with citation; not a listing recommendation.
Output
Returns the computed MELD-Na score as a numeric value, along with intermediate values (floored/clamped inputs per OPTN rules) and the published formula citation. Includes notes on OPTN-specified floors and caps applied to inputs (e.g. creatinine floored at 1, capped at 4; sodium clamped to 125–137 range when MELD > 11).
Example use cases
Pre-transplant liver severity assessment
“I need the MELD-Na score for a cirrhosis patient: INR 2.4, creatinine 1.8 mg/dL, total bilirubin 6.2 mg/dL, sodium 128 mmol/L, and they haven't been on dialysis — what's their OPTN score?”
Dialysis patient MELD-Na scoring
“Calculate MELD-Na for a patient who has been on dialysis twice this week, with INR 1.5, bilirubin 3.0 mg/dL, and serum sodium 134 mmol/L.”
Hyponatremia impact on MELD score
“My patient has INR 1.7, creatinine 1.2 mg/dL, bilirubin 2.8 mg/dL, and a sodium of 126 mmol/L — not on dialysis. What does their 2016 OPTN MELD-Na come out to, and does the hyponatremia change the score?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/meld_naWhen to prefer
Use this endpoint when you need a deterministic, citeable OPTN/UNOS 2016 MELD-Na score computed from raw lab values. Prefer it over manual calculation to ensure correct OPTN floor/cap/clamp rules are applied (creatinine floor at 1, cap at 4; dialysis override to 4.0; sodium clamped to 125–137 when MELD > 11). Not a transplant listing recommendation — purely a reproducible scoring computation backed by a published citation.
Side effects
- Missing required parameters (INR, sodium_mmol_l, or dialysis) returns a validation error
- Out-of-range values (e.g. sodium outside 110–160, INR outside 0.8–10) may be rejected or clamped per OPTN rules
- Neither bilirubin_mg_dl nor bilirubin_umol_l provided returns an error
- Neither creatinine_mg_dl nor creatinine_umol_l provided returns an error
- Network timeout or payment failure (x402) prevents score retrieval
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/meld_na",
"count": 2,
"items": [
{
"inr": 1.2,
"meld": 20,
"formula": "optn_meld_na_2016",
"meld_na": 26,
"citation": {
"id": "optn-meld-na-2016",
"doi": "10.1053/j.gastro.2006.02.010",
"title": "Serum sodium predicts mortality in patients listed for liver transplantation; OPTN Policy 9 MELD-Na bounds",
"source": "Gastroenterology. 2006;130(6):1652-1660; OPTN Policy 9 (2016)",
"authors": "Biggins SW, Kim WR, Terrault NA, et al.; OPTN/UNOS"
},
"dialysis": false,
"inr_used": 1.2,
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"sodium_mmol_l": 128,
"bilirubin_mg_dl": 4.2,
"creatinine_mg_dl": 1.9,
"formula_expression": "MELD = round(10 * (0.957*ln(Cr) + 0.378*ln(bili) + 1.120*ln(INR) + 0.643)); if MELD > 11, MELD-Na = round(MELD + 1.32*(137-Na) - 0.033*MELD*(137-Na))",
"sodium_used_mmol_l": 128,
"bilirubin_used_mg_dl": 4.2,
"creatinine_used_mg_dl": 1.9
},
{
"inr": 1.2,
"meld": 20,
"formula": "optn_meld_na_2016",
"meld_na": 26,
"citation": {
"id": "optn-meld-na-2016",
"doi": "10.1053/j.gastro.2006.02.010",
"title": "Serum sodium predicts mortality in patients listed for liver transplantation; OPTN Policy 9 MELD-Na bounds",
"source": "Gastroenterology. 2006;130(6):1652-1660; OPTN Policy 9 (2016)",
"authors": "Biggins SW, Kim WR, Terrault NA, et al.; OPTN/UNOS"
},
"dialysis": false,
"inr_used": 1.2,
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"sodium_mmol_l": 128,
"bilirubin_mg_dl": 4.2,
"creatinine_mg_dl": 1.9,
"formula_expression": "MELD = round(10 * (0.957*ln(Cr) + 0.378*ln(bili) + 1.120*ln(INR) + 0.643)); if MELD > 11, MELD-Na = round(MELD + 1.32*(137-Na) - 0.033*MELD*(137-Na))",
"sodium_used_mmol_l": 128,
"bilirubin_used_mg_dl": 4.2,
"creatinine_used_mg_dl": 1.9
}
]
}
}Tags
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