{"uid":"cap_zrfLlnN0iYjItos06eGLV","slug":"alvarado-mantrels-appendicitis-score-calculator-0375058c","name":"Alvarado (MANTRELS) Appendicitis Score Calculator","description":"Alvarado 1986 MANTRELS score from caller-assigned findings, temperature, WBC, and neutrophil percent (max 10). Bands 0-4, 5-6, and 7-10. Deterministic published score with citation; not a diagnosis or operating-room protocol. magent does not examine the abdomen.","url":"https://api.magentlab.com/api/calc/alvarado","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["migration","anorexia","nausea_vomiting","rlq_tenderness","rebound","temperature_c","neutrophil_percent"],"properties":{"wbc_ul":{"type":"number","description":"WBC in cells/µL (same as cells/mm^3). Provide wbc_k_ul or wbc_ul. Range 10-500000. >10000 scores 2 (10000 does not; 10001 does)."},"rebound":{"type":"boolean","description":"Rebound tenderness (R). true or false."},"anorexia":{"type":"boolean","description":"Anorexia (A). true or false."},"wbc_k_ul":{"type":"number","description":"WBC in 10^3/µL (same as 10^9/L). Provide wbc_k_ul or wbc_ul. Range 0.01-500. >10000/µL scores 2."},"migration":{"type":"boolean","description":"Pain migration to the right lower quadrant (M). true or false."},"temperature_c":{"type":"number","description":"Temperature in °C (30.0-45.0). ≥37.3 scores 1 (37.3 scores; 37.2 does not)."},"rlq_tenderness":{"type":"boolean","description":"Right-lower-quadrant tenderness (T). true scores 2; false scores 0."},"nausea_vomiting":{"type":"boolean","description":"Nausea or vomiting (N). true or false."},"neutrophil_percent":{"type":"number","description":"Neutrophil percent (0-100). Left shift scores 1 if >75 (75.0 does not; 75.1 does)."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"path":"/api/calc/alvarado","count":2,"items":[{"score":0,"wbc_ul":8000,"formula":"alvarado","citation":{"id":"alvarado-1986","doi":"10.1016/S0196-0644(86)80993-3","title":"A practical score for the early diagnosis of acute appendicitis","source":"Ann Emerg Med. 1986;15(5):557-564","authors":"Alvarado A"},"max_score":10,"components":[{"factor":"migration","points":0,"present":false},{"factor":"anorexia","points":0,"present":false},{"factor":"nausea_vomiting","points":0,"present":false},{"factor":"rlq_tenderness","points":0,"present":false},{"factor":"rebound","points":0,"present":false},{"value":37,"factor":"temperature_c","points":0,"present":false},{"value":8000,"factor":"leukocytosis","points":0,"present":false},{"value":60,"factor":"left_shift","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.","alvarado_band":"0-4","temperature_c":37,"formula_expression":"Alvarado (MANTRELS) = migration + anorexia + nausea_vomiting + 2*rlq_tenderness + rebound + (temperature_c >= 37.3) + 2*(wbc_ul > 10000) + (neutrophil_percent > 75); max 10; bands 0-4 / 5-6 / 7-10","neutrophil_percent":60},{"score":0,"wbc_ul":8000,"formula":"alvarado","citation":{"id":"alvarado-1986","doi":"10.1016/S0196-0644(86)80993-3","title":"A practical score for the early diagnosis of acute appendicitis","source":"Ann Emerg Med. 1986;15(5):557-564","authors":"Alvarado A"},"max_score":10,"components":[{"factor":"migration","points":0,"present":false},{"factor":"anorexia","points":0,"present":false},{"factor":"nausea_vomiting","points":0,"present":false},{"factor":"rlq_tenderness","points":0,"present":false},{"factor":"rebound","points":0,"present":false},{"value":37,"factor":"temperature_c","points":0,"present":false},{"value":8000,"factor":"leukocytosis","points":0,"present":false},{"value":60,"factor":"left_shift","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.","alvarado_band":"0-4","temperature_c":37,"formula_expression":"Alvarado (MANTRELS) = migration + anorexia + nausea_vomiting + 2*rlq_tenderness + rebound + (temperature_c >= 37.3) + 2*(wbc_ul > 10000) + (neutrophil_percent > 75); max 10; bands 0-4 / 5-6 / 7-10","neutrophil_percent":60}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9EL514r0aXBaxZf90LhIN","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Alvarado 1986 MANTRELS score (0–10) for appendicitis risk stratification from clinical findings, temperature, WBC, and neutrophil percent.","exampleAgentPrompt":"Calculate the Alvarado appendicitis score for a patient with pain migration to the RLQ, anorexia, nausea, RLQ tenderness, no rebound, temperature of 38.1°C, WBC of 13,500/µL, and neutrophil percent of 80%.","exampleUseCases":[{"title":"ED triage appendicitis stratification","prompt":"I have an ED patient with classic appendicitis signs — they have pain migration to the RLQ, anorexia, and vomiting. On exam there's RLQ tenderness but no rebound. Temp is 37.8°C, WBC is 14,200/µL, and neutrophils are 82%. What's their Alvarado score?"},{"title":"Low-risk appendicitis workup decision support","prompt":"Patient has nausea and mild RLQ tenderness but no migration, no anorexia, no rebound, temp 36.9°C, WBC 8,500/µL, and 65% neutrophils. Run the Alvarado score so I can decide if imaging is warranted."},{"title":"Pediatric appendicitis scoring during on-call consult","prompt":"I'm covering call and have a 14-year-old with suspected appendicitis — migration yes, anorexia yes, vomiting yes, RLQ tenderness yes, rebound tenderness yes, temp 38.5°C, WBC 17,000/µL, 88% neutrophils. Give me the MANTRELS score and band."}],"resultDescription":"Returns the integer Alvarado MANTRELS total score from 0 to 10, the corresponding risk band (low: 0–4, equivocal: 5–6, high: 7–10), and a citation to the original Alvarado 1986 publication. Does not provide a diagnosis or surgical recommendation.","failureModes":["Missing required boolean flags (migration, anorexia, nausea_vomiting, rlq_tenderness, rebound) returns a validation error","Temperature outside 30.0–45.0°C range is rejected","WBC value out of range (0.01–500 k/µL or 10–500000/µL) is rejected","Neutrophil percent outside 0–100 is rejected","Neither wbc_k_ul nor wbc_ul provided causes an error","Payment not included or invalid returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need a fast, deterministic, published Alvarado 1986 MANTRELS score computed from discrete clinical inputs for appendicitis risk stratification. Prefer it over manual calculation when integrating into clinical decision-support workflows, EHR-adjacent agents, or ED triage pipelines. It is not a replacement for physical examination, imaging, or surgical consultation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:15:30.233Z","isFirstParty":false}