{"uid":"cap_oWXXOaUzYunbfbsy2qBHz","slug":"payne-albumin-corrected-calcium-calculator-dd656227","name":"Payne Albumin-Corrected Calcium Calculator","description":"Payne albumin-corrected calcium from total calcium and albumin. Deterministic published formula with citation; not a treatment recommendation.","url":"https://api.magentlab.com/api/calc/corrected_calcium","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":[],"properties":{"albumin_g_l":{"type":"number","description":"Albumin in g/L. Converted as g/dL = g/L / 10."},"albumin_g_dl":{"type":"number","description":"Albumin in g/dL (1-6). Provide this or albumin_g_l."},"calcium_mg_dl":{"type":"number","description":"Total calcium in mg/dL (4-16). Provide this or calcium_mmol_l."},"calcium_mmol_l":{"type":"number","description":"Total calcium in mmol/L. Converted as mg/dL = mmol/L * 4.0."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"path":"/api/calc/corrected_calcium","count":2,"items":[{"formula":"payne","citation":{"id":"payne-1973","doi":"10.1136/bmj.4.5893.643","title":"Interpretation of serum calcium in patients with abnormal serum proteins","source":"Br Med J. 1973;4(5893):643-646","authors":"Payne RB, Little AJ, Williams RB, Milner JR"},"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.","albumin_g_dl":3,"calcium_mg_dl":8,"formula_expression":"corrected_ca_mg_dl = calcium_mg_dl + 0.8 * (4.0 - albumin_g_dl)","corrected_calcium_mg_dl":8.8},{"formula":"payne","citation":{"id":"payne-1973","doi":"10.1136/bmj.4.5893.643","title":"Interpretation of serum calcium in patients with abnormal serum proteins","source":"Br Med J. 1973;4(5893):643-646","authors":"Payne RB, Little AJ, Williams RB, Milner JR"},"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.","albumin_g_dl":3,"calcium_mg_dl":8,"formula_expression":"corrected_ca_mg_dl = calcium_mg_dl + 0.8 * (4.0 - albumin_g_dl)","corrected_calcium_mg_dl":8.8}]}},"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_Li_Ez09wFmgqsNWtj0HO9","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":"Calculates albumin-corrected (ionized-equivalent) serum calcium using the Payne formula from total calcium and albumin values","exampleAgentPrompt":"What's the albumin-corrected calcium for a patient with a total calcium of 8.4 mg/dL and an albumin of 2.8 g/dL?","exampleUseCases":[{"title":"Hypoalbuminemia calcium check","prompt":"My patient has a total calcium of 9.0 mg/dL and albumin of 2.2 g/dL — what's their corrected calcium using the Payne formula?"},{"title":"ICU lab result interpretation","prompt":"Run the albumin-corrected calcium for total calcium 10.2 mg/dL and albumin 3.1 g/dL so I can tell if this ICU patient is actually hypercalcemic."},{"title":"Nephrotic syndrome workup","prompt":"A nephrotic patient has albumin of 1.8 g/dL and total calcium 7.9 mg/dL — calculate the Payne-corrected calcium to see if their true calcium is low."}],"resultDescription":"Returns the albumin-corrected serum calcium value computed via the Payne formula, along with the citation for the published formula. The result reflects the calcium level adjusted for low albumin, expressed in consistent units. No treatment recommendation is included.","failureModes":["Missing required calcium or albumin input returns an error","Albumin value outside the expected range (g/dL 1–6) may be rejected or flagged","Calcium value outside expected range (4–16 mg/dL) may be rejected","Providing both mmol/L and mg/dL simultaneously may cause ambiguity","Invalid numeric types return validation errors"],"whenToPreferThis":"Use this endpoint when you need a deterministic, citation-backed Payne albumin-corrected calcium computation and want a consistent API with unit flexibility (mg/dL or mmol/L for calcium; g/dL or g/L for albumin). Prefer this over manual calculation or LLM inference when auditability and formula provenance matter, such as in clinical workflows, EHR integrations, or automated lab result interpretation pipelines.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:59:20.040Z","isFirstParty":false}