Quick answers
- Does Asem have an emergency room?
- Yes. Medicare (CMS) data lists emergency services at Asem. In a medical emergency, call 911.
- Where is Asem?
- Edificio Central Julio a Perez Medical Center, San Juan, PR 00935, in San Juan, Puerto Rico.
- What is the phone number of Asem?
- (787) 777-3535, as listed by Medicare (CMS).
- What is the Medicare star rating of Asem?
- CMS does not show an overall star rating for this hospital. This is common, for example when a hospital reports too few quality measures or is not part of the rating program.
Specialties and care areas[3][4][5]
- Hyperbaric medicine
- Emergency medicine
- Trauma surgery
- Neurosurgery
- Neuroendovascular surgery
- Spine surgery
- Radiology
- Interventional radiology
- Pathology and laboratory medicine
- Orthopedics
- Ophthalmology
- Urology
- Otolaryngology (ENT)
- Dental
- Oral and maxillofacial surgery
- Dermatology
- Colorectal surgery
- Plastic and reconstructive surgery
- Infectious diseases
- Internal medicine
- Neurorehabilitation
- Wound care
Conditions treated[5]
- Multiple trauma (polytrauma)
- Acute spinal injuries
- Spinal and back conditions
- Cerebral aneurysm
- Cerebral and spinal vascular malformations
- Arteriovenous fistula
- Ischemic stroke
- Hemorrhagic stroke
- Carotid stenosis
- Brain tumors
- Meningioma
- Acoustic neuroma
- Pituitary adenoma
- Craniopharyngioma
- Glioblastoma
- Brain metastases
- Trigeminal neuralgia
- Epilepsy (some forms)
- Movement disorders
- Cutaneous hemangioma
Treatments[3][5]
- Gamma Knife surgery
- Hyperbaric oxygen therapy
- Alteplase (tPA) for ischemic stroke
- Blood transfusion
- Neuroendovascular treatment
- Trauma critical care
Procedures[5]
- Neuroendovascular surgery
- Cerebral aneurysm embolization
- Embolization of cerebral and spinal vascular malformations
- Embolization of brain and spine tumors (pre-operative)
- Embolization of arteriovenous fistulas
- Carotid angioplasty and stenting
- Diagnostic and therapeutic cerebral and spinal angiography
- Complex brain surgery
- Spinal cord surgery
- MRI
- CT scan
- Ultrasound (sonography)
- Conventional X-ray
- Electroencephalography (EEG)
Programs and centers[3][4][5][6]
- Blood bank
- Trauma Hospital
- Cerebrovascular Center
- Neuroendovascular Surgery Center (CENEV)
- Neuroendovascular surgery fellowship
- Spinal Cord Center
- Stroke Center (prevention and follow-up clinics)
- Gamma Knife Center
- Hyperbaric Medicine service
- Outpatient clinics
- Field medicine service
- Teaching hospital for UPR Medical Sciences Campus programs
Emergency care (hospital website)[3]
| Emergency room | Yes |
|---|
Recognition[5]
- Level I trauma center (Puerto Rico's only designated Level I, per ASEM)
- Clinical laboratory accredited by College of American Pathologists (CAP)
- Laboratory CLIA certification (CMS)
Doctors and clinicians (38)
38 doctors and other clinicians list Asem as a hospital where they work, in Medicare's official clinician data (updated 2026-10-02). It is not a complete staff list.
Main specialties
- General Surgery9
- Orthopedic Surgery6
- Emergency Medicine3
- Diagnostic Radiology3
- Internal Medicine3
- General Practice3
- Ophthalmology2
- Neurosurgery2
- Anesthesiology1
- Pulmonary Disease1
- Otolaryngology1
- Nephrology1
Doctors with a page on this site (38)
- Adolfo D. Lopez Mieres, MDInternal Medicine
- Alodia Lameiro Aguayo, MDEmergency Medicine
- Angel E. RomeroGeneral Surgery
- Angel F. Laureano Cuadrado, MDPulmonary Disease
- Anibal E. Sandoz Rivera, MDGeneral Practice
- Antonio H. Soler Salas, MDOrthopedic Surgery
- Antonio M. Pavia, MDGeneral Surgery
- Armando L. Oliver, MDOphthalmology
- Cristina M. Joy-Perez, MDGeneral Surgery
- David M. Badia Rivera, MDEmergency Medicine
- Edgar Colon Negron, MDDiagnostic Radiology
- Elfren A. Colon, MDAnesthesiology
- Eric Astacio, MDOrthopedic Surgery
- Francisco M. Lopez-Gonzalez, MDOrthopedic Surgery
- Gisela Murray Ortiz, MDNeurosurgery
- Ileana E. Ocasio Melendez, MDNephrology
- John A. Jones, MDGeneral Practice
- Jorge M. Otero Delgado, MDEmergency Medicine
- Jose A. Colon-Marquez, MDInternal Medicine
- Jose A. Lara Del Rio, MDDiagnostic Radiology
- Jose M. Santiago Figueroa, MDOrthopedic Surgery
- Julio Lopez-Maldonado, MDGeneral Surgery
- Luis A. Serrano Torres, MDOphthalmology
- Luis F. Lojo, MDOrthopedic Surgery
And 14 more: the button below opens the full list.
Names link to the doctor’s page on this site when there is one, otherwise to the official NPI Registry record (U.S. Department of Health and Human Services). Find a doctor · Source: CMS Facility Affiliation Data
About the Medicare star rating
CMS (the federal Medicare agency) gives many hospitals an overall rating from 1 to 5 stars, based on measures of mortality, safety, readmissions, patient experience and timely care. It is one piece of information: ask your doctor what matters for your care. See the full Medicare profile →
Medicare quality data
What Asem reported to Medicare (CMS), the federal agency that publishes these results for hospitals nationwide. These are averages for many patients, not a prediction for any one person: ask your doctor what matters for your care. In a medical emergency, call 911.
What patients said (patient survey)
What this means: Patients who stayed overnight answered a national survey (HCAHPS) about their stay. More stars mean patients reported a better experience than at other hospitals. The percentages show how often patients gave the best answer, next to the national average.
Not reported to Medicare
Source: Patient survey (HCAHPS) - Hospital — CMS, released July 22, 2026; patients discharged October 2024 to September 2025.
Infections caught in the hospital
What this means: CMS compares the number of infections patients caught in this hospital with the number expected for a hospital like it. The number shown is that ratio: below 1 means fewer infections than expected, above 1 means more. “Better” or “worse” is shown only when the difference is clear in the data.
| Central line bloodstream infections (CLABSI) | 6.356Worse than the national benchmark |
|---|---|
| Catheter-associated urinary tract infections (CAUTI) | 2.351Worse than the national benchmark |
| Surgical site infections after colon surgery | Not reported to Medicare |
| Surgical site infections after abdominal hysterectomy | Not reported to Medicare |
| MRSA bloodstream infections | 2.587No different from the national benchmark |
| Clostridioides difficile (C. diff) intestinal infections | 0.39Better than the national benchmark |
Source: Healthcare Associated Infections - Hospital — CMS, released July 22, 2026; data from October 2024 to September 2025.
Complications and deaths
What this means: Death rates are the share of patients who died within 30 days of going into the hospital for that condition, adjusted for how sick they were. PSI-90 combines several serious complications (a lower number is better). “No different from the national rate” is the most common result and means the hospital is in line with hospitals nationwide.
| Deaths within 30 days: heart attack patients | Not reported to Medicare |
|---|---|
| Deaths within 30 days: heart failure patients | Not reported to Medicare |
| Deaths within 30 days: pneumonia patients | Not reported to Medicare |
| Deaths within 30 days: COPD patients | Not reported to Medicare |
| Deaths within 30 days: stroke patients | Not reported to Medicare |
| Deaths within 30 days: coronary bypass surgery (CABG) | Not reported to Medicare |
| Serious complications (patient safety indicator PSI-90) | Not reported to Medicare |
| Complications after hip or knee replacement | Not reported to Medicare |
Source: Complications and Deaths - Hospital — CMS, released September 10, 2026.
Return visits to the hospital (readmissions)
What this means: The share of patients who had to be admitted to a hospital again within 30 days after going home, adjusted for how sick they were. A lower percentage is better.
| Returned to any hospital within 30 days (all patients) | Not reported to Medicare |
|---|---|
| Readmitted within 30 days: heart attack | Not reported to Medicare |
| Readmitted within 30 days: heart failure | Not reported to Medicare |
| Readmitted within 30 days: pneumonia | Not reported to Medicare |
| Readmitted within 30 days: COPD | Not reported to Medicare |
| Readmitted within 30 days: coronary bypass surgery | Not reported to Medicare |
| Readmitted within 30 days: hip or knee replacement | Not reported to Medicare |
Source: Unplanned Hospital Visits - Hospital — CMS, released September 10, 2026.
Emergency room times and sepsis care
What this means: ER time is the middle (median) time from arriving at the emergency room to leaving it; busier ERs usually have longer times, so the ER volume is shown too. Leaving before being seen: a lower percentage is better. Sepsis is a life-threatening reaction to an infection; a higher percentage means more patients got every recommended early step.
| Average (median) time patients spent in the emergency room before leaving (OP-18b) | Not reported to Medicare |
|---|---|
| Patients who left the emergency room before being seen (OP-22) | Not reported to Medicare |
| Sepsis patients who got all the recommended early care (SEP-1) | Not reported to Medicare |
Source: Timely and Effective Care - Hospital — CMS, released July 22, 2026.
ER wait times and Medicare ratings nearby
How this hospital compares with others in the area, ranked only by official Medicare (CMS) numbers.
Prices
We have not been able to read a price file for Asem yet. Every US hospital must publish its standard charges online (federal price transparency rule): look for “price transparency” or “standard charges” on the hospital’s website, or call the hospital and ask for an estimate. In a medical emergency, call 911.
Hospital information
| Hospital type | Acute Care Hospital |
|---|---|
| Address | Edificio Central Julio a Perez Medical Center, San Juan, PR 00935 |
| County | San Juan |
| State | Puerto Rico |
| Phone | (787) 777‑3535 |
| Emergency services | Yes |
| Ownership | Government - State |
| Medicare overall rating | Not rated by CMS |
| CMS Certification Number | 400127 |
| Name in Medicare records | ASEM |
| Profile level | Medicare data + hospital website |
| Name on the hospital’s website | Administración de Servicios Médicos de Puerto Rico (ASEM) - Centro Médico de Puerto Rico |
| Official website | asem.pr.gov |
| Corrections | Report an error or suggest an update → |
Sources
- Hospital General Information — Centers for Medicare & Medicaid Services (CMS), data updated 2026-07-22, retrieved 2026-10-29
- Medicare Care Compare — official Medicare profile of this hospital
From the hospital’s website
Numbers match the citations above. Checked 2026-10-30.
- ASEM — asem.pr.gov
- Localización — asem.pr.gov
- Servicios Médicos — asem.pr.gov
- Sobre Nosotros — asem.pr.gov