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MELD Score Calculator (Kamath 2001)
x402
MELD Score Calculator (Kamath 2001) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Calculates the original Kamath 2001 MELD score for end-stage liver disease severity from creatinine, bilirubin, INR, and disease etiology.
Price / call$0.005
Success—
StatusUnknown
How this service works
Kamath 2001 model for end-stage liver disease (MELD) from creatinine, bilirubin, INR, and etiology. meld = round(3.8*ln(bilirubin_mg_dL) + 11.2*ln(INR) + 9.6*ln(creatinine_mg_dL) + 6.4*etiology). etiology is 0 if cholestatic or alcoholic, else 1. Does not floor labs at 1.0 and does not include dialysis (later UNOS/OPTN). Not MELD-Na. Not a transplant listing or allocation order.
Output
Returns a rounded integer MELD score computed using the exact Kamath 2001 formula: round(3.8×ln(bilirubin) + 11.2×ln(INR) + 9.6×ln(creatinine) + 6.4×etiology), where etiology is 0 for cholestatic/alcoholic and 1 otherwise. Does not floor labs at 1.0, does not account for dialysis, and is not MELD-Na.
Example use cases
Cirrhosis severity assessment at bedside
“My patient has alcoholic cirrhosis — INR is 1.3, bilirubin is 2.8 mg/dL, and creatinine is 0.9 mg/dL. Can you compute the original Kamath MELD score for them?”
Hepatologist research data pipeline
“I need to batch-score a dataset entry: INR 2.1, creatinine 1.9 mg/dL, bilirubin 5.4 mg/dL, non-cholestatic non-alcoholic etiology. Give me the Kamath 2001 MELD value.”
Compare MELD before and after treatment
“Compute the original MELD score for a patient now on follow-up: INR dropped to 1.2, bilirubin is 1.5 mg/dL, creatinine is 1.1 mg/dL — etiology is primary biliary cholangitis so mark it as cholestatic.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/meldWhen to prefer
Use this endpoint when you need the original Kamath 2001 MELD score exactly as published, without the UNOS/OPTN lab-flooring rules, dialysis adjustment, or sodium correction. Prefer this over MELD-Na calculators when replicating original study results or when sodium data is unavailable. Choose this over manual computation to avoid unit-conversion errors (µmol/L inputs are accepted natively).
Side effects
- Missing required parameters (inr or cholestatic_or_alcoholic) returns a validation error
- Providing both creatinine_mg_dl and creatinine_umol_l simultaneously may cause an error or unexpected behavior
- Lab values outside the stated ranges (e.g. INR <0.8 or >10) may return an error or inaccurate result
- Logarithm of zero or negative lab values is mathematically undefined and will cause a computation error
- Providing bilirubin in neither accepted unit will result in a missing-parameter error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/meld",
"count": 2,
"items": [
{
"inr": 1.2,
"meld": 14,
"formula": "kamath_meld_2001",
"citation": {
"id": "kamath-2001",
"doi": "10.1053/jhep.2001.22172",
"pmid": "11172350",
"title": "A model to predict survival in patients with end-stage liver disease",
"source": "Hepatology. 2001;33(2):464-470",
"authors": "Kamath PS, Wiesner RH, Malinchoc M, Kremers W, Therneau TM, Kosberg CL, D'Amico G, Dickson ER, Kim WR"
},
"etiology": 0,
"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.",
"bilirubin_mg_dl": 4.2,
"creatinine_mg_dl": 1.9,
"formula_expression": "meld = round(3.8 * ln(bilirubin_mg_dL) + 11.2 * ln(INR) + 9.6 * ln(creatinine_mg_dL) + 6.4 * etiology)",
"cholestatic_or_alcoholic": true
},
{
"inr": 1.2,
"meld": 14,
"formula": "kamath_meld_2001",
"citation": {
"id": "kamath-2001",
"doi": "10.1053/jhep.2001.22172",
"pmid": "11172350",
"title": "A model to predict survival in patients with end-stage liver disease",
"source": "Hepatology. 2001;33(2):464-470",
"authors": "Kamath PS, Wiesner RH, Malinchoc M, Kremers W, Therneau TM, Kosberg CL, D'Amico G, Dickson ER, Kim WR"
},
"etiology": 0,
"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.",
"bilirubin_mg_dl": 4.2,
"creatinine_mg_dl": 1.9,
"formula_expression": "meld = round(3.8 * ln(bilirubin_mg_dL) + 11.2 * ln(INR) + 9.6 * ln(creatinine_mg_dL) + 6.4 * etiology)",
"cholestatic_or_alcoholic": true
}
]
}
}Tags
x402
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