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PSI/PORT Pneumonia Severity Index Calculator
x402
PSI/PORT Pneumonia Severity Index 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).
Calculates the Fine 1997 Pneumonia Severity Index (PSI/PORT) risk class (I–V) and Table 2 point total for community-acquired pneumonia severity stratification.
Price / call$0.005
Success—
StatusUnknown
How this service works
Fine 1997 Pneumonia Severity Index (PSI/PORT): Class I if age ≤50 and no neoplastic, liver, CHF, cerebrovascular, or renal disease, no AMS, HR <125, RR <30, SBP >=90, and temperature 35 to <40 C. Otherwise Table 2 points (age, or age-10 if female, plus comorbidity, vital-sign, and laboratory weights) map to classes II-V. Always returns the Table 2 total. Not a medical device and not a site-of-care decision.
Output
Returns the PSI/PORT risk class (I through V) determined by Fine 1997 step-wise logic — Class I if age ≤50 with no qualifying comorbidities or abnormal vitals, otherwise Classes II–V based on Table 2 total point score — and always includes the Table 2 cumulative numeric point total. Not intended as a medical device or site-of-care decision tool.
Example use cases
ED triage pneumonia risk class
“I have a 58-year-old female in the ED with community-acquired pneumonia — no comorbidities, heart rate 98, respiratory rate 24, systolic BP 100, temp 38.5°C, pH 7.40, BUN 18, sodium 140, glucose 110, hematocrit 40%, PaO2 80, no pleural effusion, not in a nursing home. What's her PSI PORT risk class and point total?”
ICU admission stratification for elderly patient
“Score the Fine PSI for an 80-year-old male with neoplastic disease and renal disease — heart rate 130 bpm, respiratory rate 32, systolic BP 85, temp 36.0°C, arterial pH 7.28, BUN 35 mg/dL, sodium 132 mmol/L, glucose 250 mg/dL, hematocrit 29%, PaO2 50 mmHg, and pleural effusion present, not a nursing home resident, no liver disease, CHF, or cerebrovascular disease.”
Low-risk outpatient pneumonia check
“Run the PSI PORT score for a 38-year-old female with pneumonia — no neoplastic, liver, CHF, cerebrovascular, or renal disease, no altered mental status, heart rate 88, respiratory rate 18, systolic BP 115, temp 37.8°C, pH 7.42, BUN 12 mg/dL, sodium 141 mmol/L, glucose 95 mg/dL, hematocrit 42%, PaO2 88 mmHg, no pleural effusion, not in a nursing home.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/psi_portWhen to prefer
Choose this endpoint when you need a validated, algorithmic implementation of the Fine 1997 PSI/PORT score with full Table 2 point accounting — especially when your clinical decision support pipeline requires the numeric subtotal alongside the risk class, or when you need to confirm Step 1 Class I eligibility programmatically. Prefer it over SMART-COP (also available on this host) when the clinical question is mortality risk class rather than need for intensive respiratory or vasopressor support.
Side effects
- Missing required query parameters (age, sex, vitals, labs, comorbidity flags) returns an error
- Out-of-range values for numeric fields (e.g. age <18 or >120, pH outside 6.80–7.80) may return validation errors
- Incorrect data types (e.g. non-boolean for comorbidity flags) cause parameter parsing failures
- Network or payment authorization failure returns HTTP 402 or 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/psi_port",
"count": 2,
"items": [
{
"score": 45,
"formula": "psi_port",
"citation": {
"id": "fine-1997",
"doi": "10.1056/NEJM199701233360402",
"pmid": "8995086",
"title": "A prediction rule to identify low-risk patients with community-acquired pneumonia",
"source": "N Engl J Med. 1997;336(4):243-250",
"authors": "Fine MJ, Auble TE, Yealy DM, et al."
},
"age_years": 45,
"components": [
{
"value": 45,
"factor": "age",
"points": 45,
"present": true
},
{
"factor": "nursing_home",
"points": 0,
"present": false
},
{
"factor": "neoplastic",
"points": 0,
"present": false
},
{
"factor": "liver_disease",
"points": 0,
"present": false
},
{
"factor": "chf",
"points": 0,
"present": false
},
{
"factor": "cerebrovascular",
"points": 0,
"present": false
},
{
"factor": "renal_disease",
"points": 0,
"present": false
},
{
"factor": "altered_mental_status",
"points": 0,
"present": false
},
{
"value": 16,
"factor": "respiratory_rate_ge_30",
"points": 0,
"present": false
},
{
"value": 120,
"factor": "systolic_mm_hg_lt_90",
"points": 0,
"present": false
},
{
"value": 37,
"factor": "temperature_extreme",
"points": 0,
"present": false
},
{
"value": 80,
"factor": "heart_rate_ge_125",
"points": 0,
"present": false
},
{
"value": 7.4,
"factor": "arterial_ph_lt_7_35",
"points": 0,
"present": false
},
{
"value": 14,
"factor": "bun_ge_30",
"points": 0,
"present": false
},
{
"value": 140,
"factor": "sodium_lt_130",
"points": 0,
"present": false
},
{
"value": 90,
"factor": "glucose_ge_250",
"points": 0,
"present": false
},
{
"value": 42,
"factor": "hematocrit_lt_30",
"points": 0,
"present": false
},
{
"value": 90,
"factor": "pao2_lt_60",
"points": 0,
"present": false
},
{
"factor": "pleural_effusion",
"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.",
"risk_class": 1,
"formula_expression": "PSI/PORT two-step (Fine 1997): Class I if age<=50 and no neoplastic, liver, CHF, cerebrovascular, renal, AMS and HR<125, RR<30, SBP>=90, temp>=35 and <40; else Table 2 points: age (men) or age-10 (women) + nursing_home 10 + neoplastic 30 + liver 20 + CHF 10 + cerebrovascular 10 + renal 10 + AMS 20 + RR>=30 20 + SBP<90 20 + (temp<35 or >=40) 15 + HR>=125 10 + pH<7.35 30 + BUN>=30 20 + Na<130 20 + glucose>=250 10 + Hct<30 10 + PaO2<60 10 + pleural_effusion 10; class I from step 1 else 2 if <=70, 3 if 71-90, 4 if 91-130, 5 if >130"
},
{
"score": 45,
"formula": "psi_port",
"citation": {
"id": "fine-1997",
"doi": "10.1056/NEJM199701233360402",
"pmid": "8995086",
"title": "A prediction rule to identify low-risk patients with community-acquired pneumonia",
"source": "N Engl J Med. 1997;336(4):243-250",
"authors": "Fine MJ, Auble TE, Yealy DM, et al."
},
"age_years": 45,
"components": [
{
"value": 45,
"factor": "age",
"points": 45,
"present": true
},
{
"factor": "nursing_home",
"points": 0,
"present": false
},
{
"factor": "neoplastic",
"points": 0,
"present": false
},
{
"factor": "liver_disease",
"points": 0,
"present": false
},
{
"factor": "chf",
"points": 0,
"present": false
},
{
"factor": "cerebrovascular",
"points": 0,
"present": false
},
{
"factor": "renal_disease",
"points": 0,
"present": false
},
{
"factor": "altered_mental_status",
"points": 0,
"present": false
},
{
"value": 16,
"factor": "respiratory_rate_ge_30",
"points": 0,
"present": false
},
{
"value": 120,
"factor": "systolic_mm_hg_lt_90",
"points": 0,
"present": false
},
{
"value": 37,
"factor": "temperature_extreme",
"points": 0,
"present": false
},
{
"value": 80,
"factor": "heart_rate_ge_125",
"points": 0,
"present": false
},
{
"value": 7.4,
"factor": "arterial_ph_lt_7_35",
"points": 0,
"present": false
},
{
"value": 14,
"factor": "bun_ge_30",
"points": 0,
"present": false
},
{
"value": 140,
"factor": "sodium_lt_130",
"points": 0,
"present": false
},
{
"value": 90,
"factor": "glucose_ge_250",
"points": 0,
"present": false
},
{
"value": 42,
"factor": "hematocrit_lt_30",
"points": 0,
"present": false
},
{
"value": 90,
"factor": "pao2_lt_60",
"points": 0,
"present": false
},
{
"factor": "pleural_effusion",
"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.",
"risk_class": 1,
"formula_expression": "PSI/PORT two-step (Fine 1997): Class I if age<=50 and no neoplastic, liver, CHF, cerebrovascular, renal, AMS and HR<125, RR<30, SBP>=90, temp>=35 and <40; else Table 2 points: age (men) or age-10 (women) + nursing_home 10 + neoplastic 30 + liver 20 + CHF 10 + cerebrovascular 10 + renal 10 + AMS 20 + RR>=30 20 + SBP<90 20 + (temp<35 or >=40) 15 + HR>=125 10 + pH<7.35 30 + BUN>=30 20 + Na<130 20 + glucose>=250 10 + Hct<30 10 + PaO2<60 10 + pleural_effusion 10; class I from step 1 else 2 if <=70, 3 if 71-90, 4 if 91-130, 5 if >130"
}
]
}
}Tags
x402
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