LRINEC Score Calculator

x402

LRINEC Score Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Computes the LRINEC score (Wong 2004) from laboratory values to assess risk of necrotizing fasciitis

Price / call$0.005

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How this service works

Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.

Output

Returns the total LRINEC score (0–13), individual component scores for each lab input, and interpretation relative to the ≥6 cutoff for elevated necrotizing fasciitis risk. Includes a citation note that the score does not diagnose NF and a score below cutoff does not exclude disease.

Example use cases

ED triage for necrotizing fasciitis

“I have a patient in the ED with a rapidly spreading soft tissue infection. Labs show CRP 175 mg/L, WBC 27k/µL, hemoglobin 11.8 g/dL, sodium 133 mmol/L, creatinine 1.6 mg/dL, and glucose 185 mg/dL. Can you compute the LRINEC score and tell me if it's above 6?”

Surgical consult documentation

“The surgical consult wants the formal LRINEC score before they come evaluate — patient has CRP 90 mg/L, WBC 14k/µL, hemoglobin 13.0 g/dL, sodium 138 mmol/L, creatinine 95 µmol/L, glucose 9 mmol/L. What's the score and what does it mean?”

Clinical decision support integration

“For this ICU patient with suspected necrotizing fasciitis, run the LRINEC score using CRP 210 mg/L, WBC 31k/µL, hemoglobin 9.5 g/dL, sodium 129 mmol/L, creatinine 2.0 mg/dL, and glucose 230 mg/dL, and flag if the score is ≥6 or ≥8.”

Technical details

Endpoint

GEThttps://api.magentlab.com/api/calc/lrinec?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a deterministic, citation-backed LRINEC score computed from raw lab values without manual lookup of component thresholds. Prefer it over general LLM reasoning for clinical score calculation where reproducibility and the published Wong 2004 algorithm matter. It supports flexible unit input (mg/dL or µmol/L for creatinine, mg/dL or mmol/L for glucose, cells/µL or k/µL for WBC), making it easy to pass labs as charted without unit conversion.

Side effects

Missing required parameters (crp_mg_l, hemoglobin_g_dl, sodium_mmol_l) returns 400 validation error
Providing both glucose_mg_dl and glucose_mmol_l or both creatinine units simultaneously may cause error or ambiguity
Values outside specified ranges (e.g. CRP >500, hemoglobin <3 g/dL) may be rejected
402 Payment Required if x402 payment header is absent or insufficient
Conflicting WBC units (both wbc_ul and wbc_k_ul provided) may cause unexpected behavior

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "path": "/api/calc/lrinec",
    "count": 2,
    "items": [
      {
        "score": 0,
        "formula": "lrinec",
        "citation": {
          "id": "wong-2004",
          "doi": "10.1097/01.ccm.0000131218.22741.d4",
          "title": "The LRINEC (Laboratory Risk Indicator for Necrotizing Fasciitis) score: a tool for distinguishing necrotizing fasciitis from other soft tissue infections",
          "source": "Crit Care Med. 2004;32(7):1535-1541",
          "authors": "Wong CH, Khin LW, Heng KS, Tan KC, Low CO"
        },
        "crp_mg_l": 20,
        "wbc_k_ul": 8,
        "max_score": 13,
        "components": [
          {
            "value": 20,
            "factor": "crp",
            "points": 0,
            "present": false
          },
          {
            "value": 8,
            "factor": "wbc",
            "points": 0,
            "present": false
          },
          {
            "value": 14,
            "factor": "hemoglobin",
            "points": 0,
            "present": false
          },
          {
            "value": 140,
            "factor": "sodium",
            "points": 0,
            "present": false
          },
          {
            "value": 88.42,
            "factor": "creatinine",
            "points": 0,
            "present": false
          },
          {
            "value": 4.994949551009535,
            "factor": "glucose",
            "points": 0,
            "present": false
          }
        ],
        "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": 140,
        "glucose_mmol_l": 4.994949551009535,
        "hemoglobin_g_dl": 14,
        "creatinine_umol_l": 88.42,
        "at_or_above_cutoff": false,
        "formula_expression": "LRINEC = CRP (>=150 mg/L → 4) + WBC 10^3/mm^3 (<15 → 0; 15-25 → 1; >25 → 2) + hemoglobin g/dL (>13.5 → 0; 11-13.5 → 1; <11 → 2) + sodium (<135 mmol/L → 2) + creatinine (>141 µmol/L → 2) + glucose (>10 mmol/L → 1); max 13; cutoff >=6"
      },
      {
        "score": 0,
        "formula": "lrinec",
        "citation": {
          "id": "wong-2004",
          "doi": "10.1097/01.ccm.0000131218.22741.d4",
          "title": "The LRINEC (Laboratory Risk Indicator for Necrotizing Fasciitis) score: a tool for distinguishing necrotizing fasciitis from other soft tissue infections",
          "source": "Crit Care Med. 2004;32(7):1535-1541",
          "authors": "Wong CH, Khin LW, Heng KS, Tan KC, Low CO"
        },
        "crp_mg_l": 20,
        "wbc_k_ul": 8,
        "max_score": 13,
        "components": [
          {
            "value": 20,
            "factor": "crp",
            "points": 0,
            "present": false
          },
          {
            "value": 8,
            "factor": "wbc",
            "points": 0,
            "present": false
          },
          {
            "value": 14,
            "factor": "hemoglobin",
            "points": 0,
            "present": false
          },
          {
            "value": 140,
            "factor": "sodium",
            "points": 0,
            "present": false
          },
          {
            "value": 88.42,
            "factor": "creatinine",
            "points": 0,
            "present": false
          },
          {
            "value": 4.994949551009535,
            "factor": "glucose",
            "points": 0,
            "present": false
          }
        ],
        "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": 140,
        "glucose_mmol_l": 4.994949551009535,
        "hemoglobin_g_dl": 14,
        "creatinine_umol_l": 88.42,
        "at_or_above_cutoff": false,
        "formula_expression": "LRINEC = CRP (>=150 mg/L → 4) + WBC 10^3/mm^3 (<15 → 0; 15-25 → 1; >25 → 2) + hemoglobin g/dL (>13.5 → 0; 11-13.5 → 1; <11 → 2) + sodium (<135 mmol/L → 2) + creatinine (>141 µmol/L → 2) + glucose (>10 mmol/L → 1); max 13; cutoff >=6"
      }
    ]
  }
}

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