Source: CMS Care Compare, July 2026 releaseER figures are medians, not live waitsAbout the data
Visiting Oconomowoc Memorial Hsptl
Oconomowoc, WI 53066
County: Waukesha Directions Apple Maps Call (262) 569-9400
- 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
Official links: Website for Oconomowoc Memorial Hsptl (opens the hospital's site)
Nearby hospitals
- 1.0mi Rogers Memorial Hospital Oconomowoc, WI Call Rogers Memorial Hospital Directions to Rogers Memorial Hospital (Google Maps) Details for Rogers Memorial Hospital
- 2.5mi Aurora Medical Center Summit, WI · Emergency room · median ER visit 2 hr 22 min Call Aurora Medical Center Directions to Aurora Medical Center (Google Maps) Details for Aurora Medical Center
- 11mi Waukesha County Mental Health Center Waukesha, WI Call Waukesha County Mental Health Center Directions to Waukesha County Mental Health Center (Google Maps) Details for Waukesha County Mental Health Center
Quick answers about Oconomowoc Memorial Hsptl
How long is the ER wait at Oconomowoc Memorial Hsptl?
CMS doesn't publish live wait times. Over the 12 months CMS reported, patients treated and sent home spent a median of 2 hr 16 min in the Oconomowoc Memorial Hsptl emergency room (the average across Wisconsin hospitals is 2 hr 18 min). 0% of ER patients left before being seen. For tonight's wait, check the hospital's website (opens the hospital's own site) or call (262) 569-9400. In an emergency, call 911.
What is the phone number for Oconomowoc Memorial Hsptl?
The main phone number for Oconomowoc Memorial Hsptl is (262) 569-9400, from Medicare's hospital records.
Call (262) 569-9400What is the address of Oconomowoc Memorial Hsptl?
Oconomowoc Memorial Hsptl is at 791 Summit Ave, Oconomowoc, WI 53066.
Directions (opens Google Maps)Does Oconomowoc Memorial Hsptl have an emergency room?
Yes. Oconomowoc Memorial Hsptl has an emergency department, according to Medicare data.
What is Oconomowoc Memorial Hsptl's Medicare star rating?
Oconomowoc Memorial Hsptl has an overall rating of 5 out of 5 stars from the Centers for Medicare & Medicaid Services (CMS). Star ratings come from CMS quality and safety measures, not patient reviews.
Quality and performance
Centers for Medicare & Medicaid Services · data as of July 2026
Patients treated and sent home from the emergency department at Oconomowoc Memorial Hsptl spend a median of 2 hours 16 minutes there. That is about the same as the average across Wisconsin hospitals (2 hours 18 minutes).
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 Oconomowoc Memorial Hsptl. For a medical emergency, call 911.
Compare ER waits across Wisconsin · How Wisconsin hospitals rank on star ratings · Other birthing-friendly hospitals in Wisconsin · How we source this data · Something wrong on this page? Tell us
What patients say
CMS patient survey (HCAHPS) · 509 completed surveys · patients discharged Oct 2024 – Sep 2025
Patients gave Oconomowoc Memorial Hsptl a 4-star patient experience rating out of 5. 76% would definitely recommend it (U.S. average 71%). 76% 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.
Nearby ERs with shorter visits
Infections, complications and deaths
Centers for Medicare & Medicaid Services · compared with hospitals nationwide
Oconomowoc Memorial Hsptl was no different from the national benchmark on the one hospital-acquired infection CMS could compare. 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 | 11.7% | 11.1% |
| Pneumonia patients | 13.2% | 15.2% |
| Stroke patients | 13.9% | 11.9% |
| COPD patients | 7.6% | 8.6% |
| Hospital-wide, all conditions | 4.5% | 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 |
|---|---|---|---|
| Complications after hip or knee replacement% of patients | 3.8 | 4.1 | Not compared |
| Pressure ulcers (bed sores)per 1,000 patients | 0.43 | 0.63 | Same as national |
| Falls in the hospital that caused a broken boneper 1,000 patients | 0.26 | 0.27 | Same as national |
| Collapsed lung caused by a medical procedureper 1,000 patients | 0.2 | 0.21 | Same as national |
| Bleeding or blood clot under the skin after surgeryper 1,000 patients | 2.25 | 2.34 | Same as national |
| Kidney injury needing dialysis after surgeryper 1,000 patients | 1.43 | 1.67 | Same as national |
| Respiratory failure after surgeryper 1,000 patients | 8.47 | 9.42 | Same as national |
| Blood clots in the lungs or legs after surgeryper 1,000 patients | 3.55 | 3.52 | Same as national |
| Bloodstream infection (sepsis) after surgeryper 1,000 patients | 4.59 | 5.27 | Same as national |
| Surgical wound splitting openper 1,000 patients | 1.76 | 1.77 | Same as national |
| Accidental cuts or tears during abdominal surgeryper 1,000 patients | 1.03 | 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, Oconomowoc Memorial Hsptl 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 | 14.2% | 14.4% | Not compared |
| Heart failure | 21.5% | 21.3% | Not compared |
| Pneumonia | 17.4% | 17.3% | Not compared |
| COPD (chronic lung disease) | 19.7% | 20% | Not compared |
| Hip or knee replacement | 5.3% | 5.8% | 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 |
|---|---|---|---|
| Heart failure | 1.070 | 178 | More than expected |
| Pneumonia | 1.033 | 164 | More than expected |
| COPD | 0.948 | – | Fewer than expected |
| Heart attack | 0.921 | – | Fewer than expected |
| Hip or knee replacement | 0.794 | – | 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
Oconomowoc Memorial Hsptl's emergency department is classed by CMS as low 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. 88 patients. | 80% | 65% |
| Septic shock: full treatment within 3 hoursHigher is better. 22 patients. | 82% | 73% |
| 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. 370 patients. | 136 min | 162 min |
| Typical ER time for mental health patients sent homeMedian minutes from arrival to leaving. Lower is better. 29 patients. | 160 min | 257 min |
| Patients who left the ER before being seenLower is better. 14,336 patients. | 0% | 2% |
| Health care workers vaccinated against fluHigher is better. 1,749 patients. | 98% | 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. 745 patients. | 13% | 15% |
| Colonoscopy: right follow-up interval for average-risk patientsHigher is better. 19 patients. | 95% | 93% |
| Blood clot prevention givenHigher is better. 1,251 patients. | 100% | 90%* |
| Blood clot prevention given in intensive careHigher is better. 165 patients. | 100% | 97%* |
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 | 16 |
| Patient experiencePatient survey results | 45 |
| SafetyHospital-acquired infections | 75 |
| Efficiency and costMedicare spending per patient | 0 |
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.
Care after a stay at Oconomowoc Memorial Hsptl
Medicare-certified providers near this hospital, with their CMS ratings. A hospital discharge planner can make the referral.
Skilled nursing facilities nearby
- 2.1mi Shorehaven Health & Rehab Center Oconomowoc, WI · 88 beds Medicare overall 5 of 5 stars · Short-stay quality 4 of 5
- 2.8mi Lake Country Health Services Oconomowoc, WI · 100 beds Medicare overall 2 of 5 stars · Short-stay quality 4 of 5
- 5.6mi Masonic Center for Health & Rehab Dousman, WI · 50 beds Medicare overall 5 of 5 stars · Short-stay quality 5 of 5
Skilled nursing ratings and inspections at Nursing Homes In Each State
Dialysis centers nearby See more
- 1.0mi DaVita Oconomowoc DialysisOconomowoc, WI
- 6.0mi DaVita Lake Country Dialysis (PD)Delafield, WI
- 11mi Fresenius Medical Care Midwest WaukeshaWaukesha, WI
Home health agencies nearby See more
- 11mi Hannah Home Health CareWaukesha, WI · 72% would recommend
- 11mi Prohealth Home CareWaukesha, WI · 85% would recommend
- 11mi Commonheart Home HealthWaukesha, WI · 72% would recommend
Hospice care providers nearby See more
- 11mi Prohealth Home HospiceWaukesha, WI · 92% would recommend
- 11mi St Croix Hospice WaukeshaWaukesha, WI · 85% would recommend
- 11mi Commonheart HospiceWaukesha, WI · 73% would recommend
Source: CMS Care Compare. Distances are approximate.
Doctors at Oconomowoc Memorial Hsptl
266 Medicare-enrolled doctors and other clinicians list this hospital as an affiliation, across 26 specialties.
Find doctors in Oconomowoc
Medicare-enrolled specialists with a practice in Oconomowoc, with addresses, phone numbers and the hospitals they work with.
What Medicare paid at Oconomowoc Memorial Hsptl
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 Wisconsin.
Hospital stays
| Stay | Stays | Avg billed | Avg payment (Medicare + patient) | vs state |
|---|---|---|---|---|
| Septicemia or severe sepsis without ventilator >96 hours with major complicationsDRG 871 | 63 | $48,761 | $12,269 | −27% |
| Heart failure and shock with major complicationsDRG 291 | 56 | $39,913 | $9,061 | −17% |
| Major hip and knee joint replacement or reattachment of lower extremity without major complicationsDRG 470 | 29 | $73,271 | $12,643 | −15% |
| Simple pneumonia and pleurisy with complicationsDRG 194 | 24 | $24,786 | $5,468 | −25% |
| Esophagitis, gastroenteritis and miscellaneous digestive disorders without major complicationsDRG 392 | 20 | $27,955 | $5,294 | −24% |
| Kidney and urinary tract infections without major complicationsDRG 690 | 19 | $23,239 | $5,095 | −28% |
| Respiratory infections and inflammations with major complicationsDRG 177 | 17 | $36,360 | $10,028 | −30% |
| Revision of hip or knee replacement without complicationsDRG 468 | 16 | $118,877 | $19,905 | −7% |
Outpatient services
| Service | Services | Avg billed | Avg allowed |
|---|---|---|---|
| Level 5 Musculoskeletal ProceduresAPC 5115 | 403 | $62,134 | $11,922 |
| Comprehensive Observation ServicesAPC 8011 | 233 | $16,300 | $2,442 |
| Level 2 Urology and Related ServicesAPC 5372 | 118 | $5,332 | $615 |
| Level 6 Musculoskeletal ProceduresAPC 5116 | 51 | $93,487 | $16,941 |
| Level 3 Urology and Related ServicesAPC 5373 | 50 | $10,266 | $1,856 |
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 Sep 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 Wisconsin hospital finances.
Who owns Oconomowoc Memorial Hsptl
Medicare enrollment and ownership records (PECOS)
Medicare lists the hospital's legal name as Prohealth Oconomowoc Memorial Hospital, Inc., a non-profit organization, incorporated 1955.
466 doctors and other clinicians list Oconomowoc Memorial Hsptl 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.
Non-profit finances
IRS Form 990 · tax year ending Sep 2023 · Prohealth Oconomowoc Memorial Hospital Inc (EIN 39-0794174)
As filed with the IRS by Prohealth Oconomowoc Memorial Hospital Inc. Matched by name and address, so check the filing to confirm it's the right organization. See the full Form 990 filings · Non-profit hospital finances.
The area around Oconomowoc Memorial Hsptl
HRSA shortage designations and BLS pay data
Dental: Parts of Waukesha are federally designated health professional shortage areas (2 designations). Highest shortage score 19.
Nurse pay: registered nurses in Wisconsin earn a median $95,530 a year. Healthcare salaries in Wisconsin.
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. Wisconsin shortage areas
Closest other hospitals
Healthcare pay in Wisconsin
Registered nurses across Wisconsin (all employers) earned a median of $95,530 a year (BLS, May 2025).Registered Nurse (RN) salary in WisconsinNurse Practitioner salary in WisconsinRespiratory Therapist salary in WisconsinHealthcare salaries in Wisconsin
Add this rating badge to your website
The badge updates automatically when CMS publishes new ratings. The compact and footer-strip sizes fit site footers and sidebars. All badge sizes and help.
Cite this data
Writing about Oconomowoc Memorial Hsptl? You're welcome to quote these figures. They are free to use under CC BY 4.0: please credit HospitalsInEachState.com and link to this page.