Castle Medical CenterKailua, HI
Castle Medical Center is a non-profit acute care hospital in Kailua, Hawaii, with an emergency department. As of the July 2026 CMS release, patients treated and sent home spend a median of 2 hr 36 min in its emergency department, 36 min longer than the Hawaii average of 2 hr. Medicare rates it 4 out of 5 stars overall, and patients give it 4 out of 5 in the Medicare patient survey.
(808) 263-5500 Visit Website- Time ZonePST-2
- CountyHonolulu
- Emergency CapableYes
- FIPS15003
- Area Code808
Visiting Castle Medical Center
- Photo ID and your insurance, Medicare or Medicaid card
- A list of your medicines, doses and allergies
- Your doctor's name and phone number
- A phone charger
Quality and performance
Centers for Medicare & Medicaid Services · data as of July 2026
Patients spend an average of 2 hours 36 minutes in the emergency department at Castle Medical Center. That is 36 minutes longer than the Hawaii average of 2 hours.
Source: CMS Hospital General Information and Timely & Effective Care. Wait times are a median over a past 12-month reporting period, not live data. Not affiliated with CMS or with Castle Medical Center. For a medical emergency, call 911.
Compare ER waits across Hawaii · How Hawaii hospitals rank on star ratings · Other birthing-friendly hospitals in Hawaii · How we source this data · Something wrong on this page? Tell us
What patients say
CMS patient survey (HCAHPS) · 675 completed surveys · patients discharged Oct 2024 – Sep 2025
Patients gave Castle Medical Center a 4-star patient experience rating out of 5. 78% would definitely recommend it (U.S. average 71%). 80% rated it 9 or 10 out of 10.
The patient survey (HCAHPS) asks a random sample of adult patients about their recent hospital stay. CMS adjusts the results for the mix of patients and how the survey was done, so hospitals can be compared fairly. About the data.
Infections, complications and deaths
Centers for Medicare & Medicaid Services · compared with hospitals nationwide
Of the 5 hospital-acquired infections CMS could compare, Castle Medical Center was better than the national benchmark on 1 and worse on 0. Its rate of serious complications was same as national.
Hospital-acquired infections
Serious complications
Death rates within 30 days
| Patients treated for | This hospital | U.S. |
|---|---|---|
| Heart attack patients | 11.6% | 11.9% |
| Heart failure patients | 11.2% | 11.1% |
| Pneumonia patients | 13.7% | 15.2% |
| Stroke patients | 8.6% | 11.9% |
| COPD patients | 11.0% | 8.6% |
| Hospital-wide, all conditions | 3.6% | 3.9% |
Risk-adjusted rates. CMS has not published a statistical better/worse comparison for these death rates in the current release, so small differences from the U.S. rate may be chance.
Other complications
None of the other safety indicators CMS compares was statistically better or worse than national.
All 11 complication measures
| Measure | This hospital | U.S. | CMS comparison |
|---|---|---|---|
| Deaths among surgical patients with serious treatable complicationsper 1,000 patients | 159.06 | 173.3 | Same as national |
| Pressure ulcers (bed sores)per 1,000 patients | 0.26 | 0.63 | Same as national |
| Falls in the hospital that caused a broken boneper 1,000 patients | 0.25 | 0.27 | Same as national |
| Collapsed lung caused by a medical procedureper 1,000 patients | 0.18 | 0.21 | Same as national |
| Bleeding or blood clot under the skin after surgeryper 1,000 patients | 2.08 | 2.34 | Same as national |
| Kidney injury needing dialysis after surgeryper 1,000 patients | 1.62 | 1.67 | Same as national |
| Respiratory failure after surgeryper 1,000 patients | 7.47 | 9.42 | Same as national |
| Blood clots in the lungs or legs after surgeryper 1,000 patients | 3.51 | 3.52 | Same as national |
| Bloodstream infection (sepsis) after surgeryper 1,000 patients | 4.82 | 5.27 | Same as national |
| Surgical wound splitting openper 1,000 patients | 1.67 | 1.77 | Same as national |
| Accidental cuts or tears during abdominal surgeryper 1,000 patients | 0.93 | 1.06 | Same as national |
"Better" or "worse" means CMS found the difference from the national benchmark statistically significant; most hospitals are "no different". Infection results compare the infections a hospital reported with the number predicted for a hospital of its size and type (a ratio below 1 means fewer than predicted), for Oct 2024 – Sep 2025. Death and complication rates are risk-adjusted for how sick patients were. Each death rate counts deaths within 30 days of a hospital stay, pooled over one to three years of Medicare patients depending on the measure. About the data.
Readmissions and return visits
Centers for Medicare & Medicaid Services · Medicare patients · Jul 2023 – Jun 2025
On the 4 readmission and return-visit measures CMS could compare, Castle Medical Center was no different from the national rate or its expected level.
Back in the hospital within 30 days
| After a stay for | This hospital | U.S. | CMS comparison |
|---|---|---|---|
| Heart attack | 13.8% | 14.4% | Not compared |
| Heart failure | 21.2% | 21.3% | Not compared |
| Pneumonia | 14.8% | 17.3% | Not compared |
| COPD (chronic lung disease) | 19.6% | 20% | Not compared |
Return trips after a stay or procedure
Medicare's readmission program
Excess readmission ratio: this hospital's predicted readmissions divided by the number expected for a typical hospital with the same patients. Above 1.00 means more readmissions than expected. 2 of 5 conditions are above 1.00.
| Condition | Ratio | Patients | Readmissions |
|---|---|---|---|
| COPD | 1.046 | – | More than expected |
| Heart failure | 1.003 | 114 | More than expected |
| Pneumonia | 0.997 | 201 | Fewer than expected |
| Hip or knee replacement | 0.971 | – | Fewer than expected |
| Heart attack | 0.906 | 129 | Fewer than expected |
Readmission rates count Medicare patients who were admitted to any acute-care hospital within 30 days of leaving this one, adjusted for how sick they were. "Better" or "worse" means CMS found the difference from the national rate statistically significant; most hospitals are "no different". Return-day and outpatient-surgery measures compare the hospital with what CMS expected for its own patients. The Readmissions Reduction Program ratios are shown as CMS publishes them; whether a hospital's payments are reduced depends on how its ratios compare with similar hospitals, so a ratio above 1.00 alone doesn't mean a penalty. About the data.
Timely and effective care
Centers for Medicare & Medicaid Services · all patients unless noted · Oct 2024 – Sep 2025
Castle Medical Center's emergency department is classed by CMS as medium volume.
| Measure | This hospital | U.S.* |
|---|---|---|
| Sepsis: got all recommended early treatmentPatients with severe sepsis or septic shock who received every step of the recommended early care bundle. Higher is better. 110 patients. | 93% | 65% |
| Septic shock: full treatment within 3 hoursHigher is better. 52 patients. | 96% | 73% |
| Stroke: brain scan read within 45 minutes of ER arrivalPatients arriving with stroke symptoms whose head CT or MRI was interpreted within 45 minutes. Higher is better. 15 patients. | 67% | 69% |
| Typical time in the ER before going homeMedian minutes from arrival to leaving, for ER patients sent home (not counting mental health patients or transfers). Lower is better. 400 patients. | 156 min | 162 min |
| Typical ER time for mental health patients sent homeMedian minutes from arrival to leaving. Lower is better. 21 patients. | 204 min | 257 min |
| Typical ER time for patients transferred to another facilityMedian minutes from arrival to leaving. Lower is better. 19 patients. | 452 min | 287 min |
| Patients who left the ER before being seenLower is better. 37,247 patients. | 1% | 2% |
| Health care workers vaccinated against fluHigher is better. 1,800 patients. | 95% | 78% |
| Discharged on two opioids, or an opioid and a benzodiazepinePatients sent home with prescriptions that raise the risk of overdose when combined. Lower is better. 1,029 patients. | 13% | 15% |
| Colonoscopy: right follow-up interval for average-risk patientsHigher is better. 25 patients. | 96% | 93% |
| Blood clot prevention givenHigher is better. 2,594 patients. | 94% | 90%* |
| Blood clot prevention given in intensive careHigher is better. 472 patients. | 100% | 97%* |
| Stroke: discharged on clot-prevention medicineHigher is better. 101 patients. | 92% | 98%* |
CMS publishes these process-of-care measures without a better/worse verdict, so the U.S. figure is shown for context; small differences, or results based on few patients, may not mean much. *Median of all hospitals CMS reports, where CMS publishes no national figure. About the data.
Maternity care
Centers for Medicare & Medicaid Services · reported by the hospital · Jan 2024 – Dec 2024
Maternity measures are reported by hospitals that deliver babies. The U.S. figure is the median of the hospitals CMS reports, not a CMS verdict. About the data.
Medicare spending and payment programs
Centers for Medicare & Medicaid Services
Value-based purchasing scores by area
| Area | Score (out of 100) |
|---|---|
| Clinical outcomesDeath rates and complications | 12 |
| Patient experiencePatient survey results | 63 |
| SafetyHospital-acquired infections | 83.3 |
| Efficiency and costMedicare spending per patient | 50 |
The Hospital-Acquired Condition Reduction Program cuts Medicare payments by 1% for the quarter of hospitals with the worst scores. The Hospital Value-Based Purchasing Program withholds a small share of every hospital's Medicare payments and pays it back according to the total performance score. A spending ratio of 1.00 equals the national median; spending reflects prices, the services patients received and care after discharge, not quality. Some hospitals, such as critical access, children's and cancer hospitals, are not part of these programs. About the data.
Doctors at Castle Medical Center
219 Medicare-enrolled doctors and other clinicians list this hospital as an affiliation, across 29 specialties.
What Medicare paid at Castle Medical Center
Centers for Medicare & Medicaid Services · original Medicare patients · 2024
Average hospital charges and actual payments for the procedures Medicare patients most often had here, compared with the average for Hawaii.
Hospital stays
| Stay | Stays | Avg charge | Avg payment | vs state |
|---|---|---|---|---|
| Septicemia or severe sepsis without ventilator >96 hours with major complicationsDRG 871 | 145 | $50,846 | $19,327 | −18% |
| PsychosesDRG 885 | 80 | $31,216 | $13,913 | −13% |
| Respiratory infections and inflammations with major complicationsDRG 177 | 61 | $48,899 | $16,444 | −17% |
| Acute myocardial infarction, discharged alive with major complicationsDRG 280 | 51 | $56,648 | $17,297 | −6% |
| Heart failure and shock with major complicationsDRG 291 | 42 | $31,390 | $13,715 | −16% |
| Septicemia or severe sepsis without ventilator >96 hours without major complicationsDRG 872 | 32 | $31,714 | $11,751 | −17% |
| Infectious and parasitic diseases with operating room procedures with major complicationsDRG 853 | 29 | $128,619 | $42,613 | −31% |
| Hip and femur procedures except major joint with complicationsDRG 481 | 26 | $56,955 | $21,003 | −12% |
Outpatient services
| Service | Services | Avg charge | Avg allowed |
|---|---|---|---|
| Comprehensive Observation ServicesAPC 8011 | 147 | $19,341 | $3,099 |
| Level 2 Urology and Related ServicesAPC 5372 | 101 | $2,082 | $769 |
| Level 5 Musculoskeletal ProceduresAPC 5115 | 71 | $48,801 | $15,108 |
| Level 1 Endovascular ProceduresAPC 5191 | 61 | $19,903 | $3,621 |
| Level 2 Excision/Biopsy/Incision and DrainageAPC 5072 | 52 | $6,864 | $1,808 |
Charges are the hospital's list prices; payments are what Medicare, the patient and any other insurer actually paid (for outpatient services, Medicare's allowed amount). Private insurance prices differ. "vs state" compares this hospital's average payment with the state average for the same stay. All procedure costs.
Size and finances
Medicare cost report · fiscal year ending Dec 2024
As reported by the hospital to CMS; not audited. Operating margin is income from patient care divided by net patient revenue and leaves out investment income and donations. Compare Hawaii hospital finances.
Who owns Castle Medical Center
Medicare enrollment and ownership records (PECOS)
Medicare lists the hospital's legal name as Castle Medical Center, a non-profit organization, incorporated 1960.
368 doctors and other clinicians list Castle Medical Center as a hospital affiliation in Medicare's clinician directory.
Organizations with 5% or more ownership (directly or through other companies), partnership interests or operational control, as the hospital reported them to Medicare. Records can lag behind recent sales. Individuals are not listed. Who owns America's hospitals.
The area around Castle Medical Center
HRSA shortage designations and BLS pay data
Primary care: Parts of Honolulu are federally designated health professional shortage areas (1 designation). Highest shortage score 14.
Mental health: Parts of Honolulu are federally designated health professional shortage areas (1 designation). Highest shortage score 14.
Dental: Parts of Honolulu are federally designated health professional shortage areas (2 designations). Highest shortage score 18.
Nurse pay: registered nurses in Hawaii earn a median $136,320 a year. Healthcare salaries in Hawaii.
Shortage areas are designated by the Health Resources and Services Administration where there are too few primary care, mental health or dental providers for the population; scores run from 0 to 25 for primary and mental health care and 0 to 26 for dental care, higher meaning greater need. Hawaii shortage areas
Find doctors in Kailua
Medicare-enrolled specialists with a practice in Kailua, with addresses, phone numbers and the hospitals they work with.
Care after a stay at Castle Medical Center
Medicare-certified providers near this hospital, with their CMS ratings. A hospital discharge planner can make the referral.
Dialysis centers nearby See more
- 1.0mi Liberty Dialysis Hawaii - Kailua Dialysis FacilityKailua, HI
- 4.5mi Liberty Dialysis Hawaii - Siemsen Dialysis FacilityHonolulu, HI
- 4.5mi Liberty Dialysis Hawaii - Siemsen DialysisHonolulu, HI
Home health agencies nearby See more
- 4.5mi Careresource HawaiiHonolulu, HI · 76% would recommend
- 4.5mi Kimura Home HealthHonolulu, HI Not rated
- 6.5mi Adventist Health Home Care ServicesKaneohe, HI · 84% would recommend
Hospice care providers nearby See more
- 4.5mi Navian HawaiiHonolulu, HI · 85% would recommend
- 4.5mi St Francis HospiceHonolulu, HI · 87% would recommend
- 7.2mi Bristol Hospice - HawaiiHonolulu, HI · 82% would recommend
Source: CMS Care Compare. Distances are approximate.
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