Acute Care Hospitals · Voluntary non-profit - Church
Northern Light Mercy Hospital
- 144 State Street, Portland, ME 04101
- (207) 879-3000
- Acute Care Hospitals
- Emergency services available 24/7
At a glance
Northern Light Mercy Hospital carries a 4-star CMS overall rating — above the national norm.
Healthcare-Associated Infections
lower is better · 36 measures reported
Rates of infections patients can acquire while receiving care, such as central-line and catheter-associated infections, MRSA, and C. difficile.
| Measure | Score | Compared to national |
|---|---|---|
| Central Line Associated Bloodstream Infection (ICU + select Wards): Lower Confidence Limit | — | Same as national |
| Central Line Associated Bloodstream Infection (ICU + select Wards): Upper Confidence Limit | 1.800 | Same as national |
| Central Line Associated Bloodstream Infection: Number of Device Days | 2710 | Same as national |
| Central Line Associated Bloodstream Infection (ICU + select Wards): Predicted Cases | 1.664 | Same as national |
| Central Line Associated Bloodstream Infection (ICU + select Wards): Observed Cases | 0 | Same as national |
| Central Line Associated Bloodstream Infection (ICU + select Wards) | 0.000 | Same as national |
| Catheter Associated Urinary Tract Infections (ICU + select Wards): Lower Confidence Limit | 0.045 | Same as national |
| Catheter Associated Urinary Tract Infections (ICU + select Wards): Upper Confidence Limit | 4.415 | Same as national |
| Catheter Associated Urinary Tract Infections (ICU + select Wards): Number of Urinary Catheter Days | 2110 | Same as national |
| Catheter Associated Urinary Tract Infections (ICU + select Wards): Predicted Cases | 1.117 | Same as national |
| Catheter Associated Urinary Tract Infections (ICU + select Wards): Observed Cases | 1 | Same as national |
| Catheter Associated Urinary Tract Infections (ICU + select Wards) | 0.895 | Same as national |
| SSI - Colon Surgery: Lower Confidence Limit | 0.144 | Same as national |
| SSI - Colon Surgery: Upper Confidence Limit | 2.842 | Same as national |
| SSI - Colon Surgery: Number of Procedures | 95 | Same as national |
| SSI - Colon Surgery: Predicted Cases | 2.325 | Same as national |
| SSI - Colon Surgery: Observed Cases | 2 | Same as national |
| SSI - Colon Surgery | 0.860 | Same as national |
| SSI - Abdominal Hysterectomy: Lower Confidence Limit | — | Not available |
| SSI - Abdominal Hysterectomy: Upper Confidence Limit | — | Not available |
| SSI - Abdominal Hysterectomy: Number of Procedures | 20 | Not available |
| SSI - Abdominal Hysterectomy: Predicted Cases | 0.173 | Not available |
| SSI - Abdominal Hysterectomy: Observed Cases | 1 | Not available |
| SSI - Abdominal Hysterectomy | — | Not available |
| MRSA Bacteremia: Lower Confidence Limit | — | Not available |
| MRSA Bacteremia: Upper Confidence Limit | — | Not available |
| MRSA Bacteremia: Patient Days | 22801 | Not available |
| MRSA Bacteremia: Predicted Cases | 0.994 | Not available |
| MRSA Bacteremia: Observed Cases | 1 | Not available |
| MRSA Bacteremia | — | Not available |
| Clostridium Difficile (C.Diff): Lower Confidence Limit | 0.505 | Same as national |
| Clostridium Difficile (C.Diff): Upper Confidence Limit | 1.899 | Same as national |
| Clostridium Difficile (C.Diff): Patient Days | 21150 | Same as national |
| Clostridium Difficile (C.Diff): Predicted Cases | 8.697 | Same as national |
| Clostridium Difficile (C.Diff): Observed Cases | 9 | Same as national |
| Clostridium Difficile (C.Diff) | 1.035 | Same as national |
Complications & Deaths
lower is better · 20 measures reported
Rates of serious complications (like hip/knee replacement problems or accidental cuts during surgery) and 30-day mortality rates for common conditions.
| Measure | Score | Compared to national | Sample |
|---|---|---|---|
| Rate of complications for hip/knee replacement patients | — | Not available | — |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality Rate | 4 | Same as national | 418 |
| Death rate for heart attack patients | 12.5 | Same as national | 31 |
| Death rate for CABG surgery patients | — | Not available | — |
| Death rate for COPD patients | 9 | Same as national | 36 |
| Death rate for heart failure patients | 12.2 | Same as national | 109 |
| Death rate for pneumonia patients | 13.7 | Same as national | 128 |
| Death rate for stroke patients | 14.7 | Same as national | 31 |
| Pressure ulcer rate | 0.40 | Same as national | 1228 |
| Death rate among surgical inpatients with serious treatable complications | — | Not available | — |
| Iatrogenic pneumothorax rate | 0.26 | Same as national | 1513 |
| In-hospital fall-associated fracture rate | 0.26 | Same as national | 1449 |
| Postoperative hemorrhage or hematoma rate | 2.46 | Same as national | 365 |
| Postoperative acute kidney injury requiring dialysis rate | 1.57 | Same as national | 207 |
| Postoperative respiratory failure rate | 9.27 | Same as national | 206 |
| Perioperative pulmonary embolism or deep vein thrombosis rate | 2.96 | Same as national | 377 |
| Postoperative sepsis rate | 4.53 | Same as national | 171 |
| Postoperative wound dehiscence rate | 1.69 | Same as national | 110 |
| Abdominopelvic accidental puncture or laceration rate | 1.51 | Same as national | 295 |
| CMS Medicare PSI 90: Patient safety and adverse events composite | 0.89 | Same as national | — |
Unplanned Hospital Visits & Readmissions
lower is better · 14 measures reported
How often patients return to the hospital unexpectedly within 30 days of discharge — a marker of care quality and discharge planning.
| Measure | Score | Compared to national | Sample |
|---|---|---|---|
| Hospital return days for heart attack patients | — | Not available | — |
| Hospital return days for heart failure patients | 19.4 | Not available | 123 |
| Hospital return days for pneumonia patients | -7.8 | Not available | 134 |
| Hybrid Hospital-Wide All-Cause Readmission Measure (HWR) | 13.9 | Same as national | 644 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies) | 13.2 | Same as national | 872 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapy | 10.4 | Same as national | 39 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapy | 5.1 | Same as national | 39 |
| Ratio of unplanned hospital visits after hospital outpatient surgery | 1 | Same as national | 692 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission Rate | — | Not available | — |
| Rate of readmission for CABG | — | Not available | — |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patients | 17.7 | Same as national | 37 |
| Heart failure (HF) 30-Day Readmission Rate | 20.1 | Same as national | 123 |
| Rate of readmission after hip/knee replacement | — | Not available | — |
| Pneumonia (PN) 30-Day Readmission Rate | 15.2 | Same as national | 134 |
Patient Experience (HCAHPS)
higher is better · 9 measures reported
What patients say about their hospital stay — communication with nurses and doctors, responsiveness, cleanliness, pain management, and whether they would recommend the hospital.
| Measure | Score | Sample |
|---|---|---|
| Nurse communication - star rating | 5 | 796 |
| Doctor communication - star rating | 4 | 796 |
| Communication about medicines - star rating | 4 | 796 |
| Discharge information - star rating | 5 | 796 |
| Cleanliness - star rating | 3 | 796 |
| Quietness - star rating | 4 | 796 |
| Overall hospital rating - star rating | 5 | 796 |
| Recommend hospital - star rating | 5 | 796 |
| Summary star rating | 4 | 796 |
Timely & Effective Care
higher is better (unless a wait time) · 30 measures reported
How consistently hospitals follow recommended care processes — for example, giving heart-attack patients aspirin on arrival, or the average time spent in the emergency department.
| Measure | Score | Sample |
|---|---|---|
| Emergency department volume | medium | — |
| Global Malnutrition Composite Score | — | — |
| Global Malnutrition Composite Score: Malnutrition Diagnosis Documented | — | — |
| Global Malnutrition Composite Score: Malnutrition Risk Screening | — | — |
| Global Malnutrition Composite Score: Nutrition Assessment | — | — |
| Global Malnutrition Composite Score: Nutritional Care Plan | — | — |
| Hospital Harm - Severe Hyperglycemia | — | — |
| Hospital Harm - Severe Hypoglycemia | — | — |
| Hospital Harm - Opioid Related Adverse Events | — | — |
| Healthcare workers given influenza vaccination | 98 | 1822 |
| Average (median) time all patients spent in the emergency department before leaving from the visit, including psychiatric/mental health patients and patients who were transferred to another facility. A lower number of minutes is better | 221 | 400 |
| Average (median) time patients spent in the emergency department before leaving from the visit, excluding patients transferred to another facility or psychiatric care/mental health patients. A lower number of minutes is better | 210 | 364 |
| Average (median) time psychiatric/mental health patients spent in the emergency department before leaving from the visit. A lower number of minutes is better | 534 | 32 |
| Average (median) time patients spent in the emergency department before being transferred to another facility. A lower number of minutes is better | — | — |
| Left before being seen | 3 | 23396 |
| Head CT results | — | — |
| Endoscopy/polyp surveillance: appropriate follow-up interval for normal colonoscopy in average risk patients | 99 | 98 |
| Improvement in Patient's Visual Function within 90 Days Following Cataract Surgery | — | — |
| ST-Segment Elevation Myocardial Infarction (STEMI) | — | — |
| Safe Use of Opioids - Concurrent Prescribing | 14 | 890 |
| Appropriate care for severe sepsis and septic shock | 44 | 244 |
| Septic Shock 3-Hour Bundle | 69 | 48 |
| Septic Shock 6-Hour Bundle | 96 | 25 |
| Severe Sepsis 3-Hour Bundle | 54 | 244 |
| Severe Sepsis 6-Hour Bundle | 96 | 104 |
| Discharged on Antithrombotic Therapy | — | — |
| Anticoagulation Therapy for Atrial Fibrillation/Flutter | — | — |
| Antithrombotic Therapy by End of Hospital Day 2 | — | — |
| Venous Thromboembolism Prophylaxis | 92 | 2309 |
| Intensive Care Unit Venous Thromboembolism Prophylaxis | 99 | 90 |
Maternal Health
lower is better · 4 measures reported
Measures of maternal outcomes and safe delivery practices, including severe complications during childbirth.
| Measure | Score | Sample |
|---|---|---|
| Cesarean Birth | — | — |
| Risk Adjusted Severe Obstetric Complications (All) | — | — |
| Risk Adjusted Severe Obstetric Complications (excluding blood-transfusion-only cases) | — | — |
| Maternal Morbidity Structural Measure | Yes | — |
Frequently asked questions
- How is Northern Light Mercy Hospital rated?
- Northern Light Mercy Hospital has a 4 out of 5 CMS overall star rating as of the latest CMS release.
- Does Northern Light Mercy Hospital have emergency services?
- Yes. Northern Light Mercy Hospital operates a 24/7 emergency department.
- Where is Northern Light Mercy Hospital located?
- Northern Light Mercy Hospital is located at 144 State Street, Portland, ME 04101.
- What type of hospital is Northern Light Mercy Hospital?
- Northern Light Mercy Hospital is classified by CMS as a Acute Care Hospitals facility (Voluntary non-profit - Church).
Compare with nearby hospitals
- Compare side-by-side →Not rated overall
Bar Harbor, ME
- Compare side-by-side →Not rated overall
Northern Light C a Dean Hospital
Greenville, ME
- Compare side-by-side →Not rated overall
Calais, ME
- Compare side-by-side →Not rated overall
Millinocket, ME
Data as of 2026-06-14. Source: CMS Provider Data Catalog. This is public data provided for informational purposes only and is not medical advice. See our methodology and editorial policy.