Cardiology & Vascular

Score / CalculatorPrimary clinical use
CHA2DS2-VAScStroke risk stratification in atrial fibrillation
HAS-BLEDMajor-bleed risk while on anticoagulation
TIMI Risk (UA/NSTEMI)14-day ischemic-event risk in ACS
GRACE ACSIn-hospital & 6-month mortality after ACS
HEARTMACE risk in undifferentiated chest pain
PREVENT10-year atherosclerotic CVD risk
SYNTAXCoronary-lesion complexity (PCI vs CABG)

Pulmonology

Score / CalculatorPrimary clinical use
Wells (PE)Pre-test probability of pulmonary embolism
PERCPE Rule Out Criteria
Revised GenevaAlternate PE probability tool
PSI / PORT30-day mortality in community-acquired CAP
CURB-65CAP severity & admission decision
BODE IndexPrognosis & transplant listing in COPD
mMRC DyspneaFunctional breathlessness grading

Neurology

Score / CalculatorPrimary clinical use
Glasgow Coma Scale (GCS)Conscious-level assessment after brain injury
NIH Stroke Scale (NIHSS)Quantifies neurologic-deficit severity
ABCD2Early stroke risk after TIA
ICH Score30-day mortality in intracerebral hemorrhage
Hunt-HessClinical grading of subarachnoid hemorrhage
Modified RankinFunctional outcome after stroke

Gastroenterology & Hepatology

Score / CalculatorPrimary clinical use
MELD-Na / MELD 3.0Liver-transplant priority & 90-day mortality
Child-PughCirrhosis prognosis & variceal-bleed risk
Maddrey DFSeverity of alcoholic hepatitis
Ranson CriteriaSevere acute pancreatitis prediction
BISAPEarly pancreatitis mortality risk
Glasgow-BlatchfordNeed for intervention in upper-GI bleed
RockallRe-bleed & mortality risk after GI bleed
FIB-4Non-invasive hepatic-fibrosis staging

Nephrology & Urology

Score / CalculatorPrimary clinical use
KDIGO AKI StagingDefines & grades acute kidney injury
RIFLE / AKINEarlier AKI classification frameworks
Cockcroft-Gault CrClDrug-dosing estimate of renal function
CKD-EPI eGFRChronic kidney-disease staging
IPSS (AUA BPH)Symptom severity in benign prostatic hyperplasia
STONENeed for CT imaging in suspected renal colic

Critical Care / Surgery / Trauma

Score / CalculatorPrimary clinical use
APACHE IIICU mortality prediction & benchmarking
SOFAOrgan-failure severity; defines sepsis
qSOFABedside sepsis screening outside the ICU
SAPS IIAlternative ICU outcome score
CapriniPost-op VTE-prophylaxis stratification
P-POSSUMPeri-operative morbidity/mortality risk
4Ts for HITHIT vs other thrombocytopenia
PaduaVTE risk / need for anticoagulation
RASS (richmond)agitation / sedation spectrum
Injury Severity Score (ISS)Anatomic trauma severity

Endocrine / Metabolic / Bone

Score / CalculatorPrimary clinical use
FRAX10-year osteoporotic-fracture probability
ADA / CDC Diabetes RiskCommunity screening for pre-diabetes
HOMA-IRResearch estimate of insulin resistance

Obstetrics & Neonatal

Score / CalculatorPrimary clinical use
BishopCervical favorability before induction
APGARNewborn status at 1 & 5 minutes
Biophysical Profile (BPP)Fetal well-being on ultrasound/NST
Risk of Malignancy Index (RMI)Pre-op risk for ovarian masses
Preeclampsia SeverityGuides delivery timing & therapy
EPDSPost-partum Depression

Psychiatry & Substance Withdrawal

Score / CalculatorPrimary clinical use
CIWA-ArAlcohol-withdrawal symptom titration
PHQ-9Depression screening & tracking
GAD-7Anxiety-disorder severity
CSDD(Cornell) depression in dementia
COWSClinical Opioid Withdrawal Score

Pediatrics

Score / CalculatorPrimary Clinical Use
CentorRule out strep throat