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VA TPN 1991 Nutritional Risk Index (NRI) Calculator
x402
VA TPN 1991 Nutritional Risk Index (NRI) Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Computes the Nutritional Risk Index (NRI) from serum albumin and weight data, and classifies malnutrition severity into four strata per the 1991 VA TPN NEJM criteria.
Price / call$0.005
Success—
StatusUnknown
How this service works
VA TPN 1991 Nutritional Risk Index (NEJM): NRI = 1.519*albumin_g_l + 41.7*(current/usual weight). Malnourished if NRI <= 100. Strata: not_malnourished if NRI > 100; borderline_malnourished if 97.5 < NRI <= 100; mildly_malnourished if 83.5 <= NRI <= 97.5; severely_malnourished if NRI < 83.5. Does not cap current/usual at 1. Not a malnutrition diagnosis or TPN order. magent does not assay albumin or weigh the patient. Not GNRI or PNI.
Output
Returns the computed NRI value (a continuous score using the formula 1.519 × albumin_g_l + 41.7 × (current_weight_kg / usual_weight_kg)) and a malnutrition stratum label: 'not_malnourished' (NRI > 100), 'borderline_malnourished' (97.5 < NRI ≤ 100), 'mildly_malnourished' (83.5 ≤ NRI ≤ 97.5), or 'severely_malnourished' (NRI < 83.5).
Example use cases
Pre-surgical malnutrition screening
“I have a patient going to surgery next week — their albumin is 28 g/L, current weight is 52 kg, and usual weight is 68 kg. Can you compute their NRI and tell me if they're malnourished per the VA TPN 1991 criteria?”
ICU nutritional risk stratification
“For my ICU patient with serum albumin of 2.1 g/dL, current weight 61 kg, and usual weight 65 kg, what is their Nutritional Risk Index and how severe is their malnutrition risk?”
Nutrition consult documentation support
“Help me document the NRI score for a patient with albumin 35 g/L, current weight 74 kg, and usual weight 72 kg — I need to know whether they classify as not malnourished, borderline, mildly, or severely malnourished.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/nriWhen to prefer
Use this endpoint when you need a quick, validated computation of the 1991 VA TPN Nutritional Risk Index specifically — not the GNRI (Geriatric Nutritional Risk Index) or PNI (Prognostic Nutritional Index). Choose this when you have serum albumin (in g/L or g/dL) plus current and usual weights, and need an NRI-based stratum per the NEJM 1991 criteria for clinical documentation or nutrition screening workflows.
Side effects
- Missing required query params (current_weight_kg or usual_weight_kg) returns an error
- Providing both albumin_g_l and albumin_g_dl simultaneously causes a conflict error
- usual_weight_kg of 0 causes division by zero error
- Values outside valid ranges (albumin 10-60 g/L, weights 1-500 kg) may be rejected or produce unreliable output
- Payment not provided or insufficient results in x402 payment required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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