diff --git a/fiveparaminte-main/routers/dashboard.py b/fiveparaminte-main/routers/dashboard.py
index 069331b..a4db439 100644
--- a/fiveparaminte-main/routers/dashboard.py
+++ b/fiveparaminte-main/routers/dashboard.py
@@ -349,6 +349,80 @@ def _calculate_age(dob_str: str) -> Optional[int]:
     except Exception:
         return None
 
+@router.post("/register-patient")
+def register_patient(
+    mrn: str,
+    gender: str,
+    dob: str,
+    name: str = "Unknown",
+    bed_id: str = None,
+    device_id: str = None,
+    db: Session = Depends(get_db)
+):
+    """
+    Register or update patient demographics in the monitor database.
+    
+    Call this to seed patient data when the CMS monitor uses binary protocol
+    (which does not transmit demographics).
+    
+    Example:
+      POST /api/register-patient?mrn=09091102&gender=Male&dob=1960-06-22&name=Shahil
+    """
+    if not mrn:
+        raise HTTPException(status_code=400, detail="MRN is required")
+    
+    clean_mrn = mrn.strip().upper()
+    
+    # Check if patient already exists
+    patient = db.query(Patient).filter(
+        (Patient.mrn == clean_mrn) | (Patient.patient_id == clean_mrn)
+    ).first()
+    
+    if patient:
+        # Update existing record
+        patient.mrn = clean_mrn
+        patient.name = name or patient.name
+        patient.gender = gender or patient.gender
+        patient.dob = dob or patient.dob
+        if bed_id:
+            patient.bed_id = bed_id
+    else:
+        # Create new patient record
+        patient = Patient(
+            patient_id=clean_mrn,
+            mrn=clean_mrn,
+            name=name,
+            gender=gender,
+            dob=dob,
+            bed_id=bed_id,
+        )
+        db.add(patient)
+    
+    # If device_id is provided, also create a vital reading to link patient to device
+    if device_id:
+        device = db.query(Device).filter(Device.device_id == device_id).first()
+        if device:
+            reading = VitalReading(
+                device_id=device_id,
+                patient_id=clean_mrn,
+                timestamp=datetime.now(timezone.utc),
+                transmitted=True,
+            )
+            db.add(reading)
+    
+    db.commit()
+    db.refresh(patient)
+    
+    return {
+        "status": "ok",
+        "patient_id": patient.patient_id,
+        "mrn": patient.mrn,
+        "name": patient.name,
+        "gender": patient.gender,
+        "dob": patient.dob,
+        "bed_id": patient.bed_id,
+    }
+
 @router.get("/match-patient")
 def match_patient(
     mrn: str = None,