PSI / PORT (pneumonia severity)
Compute the Pneumonia Severity Index / PORT score (Fine NEJM 1997) from age, sex, nursing-home residence, eleven comorbidities, five exam findings, and six lab or imaging variables.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 70 years
- Sex
- M
- RR >= 30
- Yes
Result: PSI ~90 - Class III (short observation typically considered).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Class I-II (<=70)
- Low risk (classes I-II); outpatient management often appropriate per source.
- Class III (71-90)
- Low-moderate risk (class III); brief observation or admission per source.
- Class IV (91-130)
- Moderate-high risk (class IV); inpatient admission per source.
- Class V (>130)
- High risk (class V); inpatient care, consider higher level of care per source.
What you enter
- Age
- Sex
- Nursing home resident (+10)
- Neoplasm (+30)
- Liver disease (+20)
- CHF (+10)
- Cerebrovascular disease (+10)
- Renal disease (+10)
The other 12 fields
- Altered mental status (+20)
- RR >= 30 (+20)
- SBP < 90 (+20)
- HR >= 125 (+10)
- Pleural effusion (+10)
- Temperature (optional; < 35 or >= 40 scores +15)
- Arterial pH (optional; < 7.35 scores +30)
- BUN (optional; >= 30 scores +20)
- Sodium (optional; < 130 scores +20)
- Glucose (optional; >= 250 scores +10)
- Hematocrit (optional; < 30 scores +10)
- PaO2 (optional; < 60 scores +10)
What this is
Sophie Well returns the points-only total, the Class I-V band, and the published 30-day mortality estimate for that class.
When to use it
Use this at first contact for a patient with community-acquired pneumonia to inform site-of-care: most Class I-II patients are managed as outpatients, Class III is the short-observation band, and Class IV-V usually warrants inpatient or ICU care. PSI is one of two validated CAP severity tools; CURB-65 is the simpler bedside alternative used when full lab values are not yet available.
How this is calculated
Fine MJ, et al. Pneumonia Severity Index. NEJM. 1997;336(4):243-250. Reference points-only implementation; class V advisory. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.