Quick answers
- Does Guam Memorial Hospital Authority have an emergency room?
- Yes. Medicare (CMS) data lists emergency services at Guam Memorial Hospital Authority. In a medical emergency, call 911.
- Where is Guam Memorial Hospital Authority?
- 85O Gov Carlos G Camacho Road, Tamuning, GU 96913, in Guam, Guam.
- What is the phone number of Guam Memorial Hospital Authority?
- (671) 647-2552, as listed by Medicare (CMS).
- What is the Medicare star rating of Guam Memorial Hospital Authority?
- 2 out of 5 stars in the CMS overall hospital quality rating (CMS data updated 2026-10-26).
Specialties and care areas[5]
- Emergency Room
- Intensive Care Unit (ICU/CCU)
- Labor & Delivery
- Medical-Surgical
- Neonatal Intensive Care
- Obstetrics/Maternity
- Pediatrics
- Radiology/Interventional Radiology
- Rehabilitative Care
- Respiratory Care
- Surgery
- Telemetry/Progressive Care
Treatments[5]
Emergency care (hospital website)[5]
| Emergency room | Yes |
|---|---|
| Open 24/7 | Yes |
Doctors and clinicians (124)
124 doctors and other clinicians list Guam Memorial Hospital Authority 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
- Internal Medicine39
- Emergency Medicine21
- Diagnostic Radiology9
- General Surgery6
- Cardiovascular Disease (Cardiology)5
- Anesthesiology4
- Certified Registered Nurse Anesthetist (CRNA)4
- Family Practice4
- Interventional Radiology4
- Nephrology4
- Pulmonary Disease3
- Orthopedic Surgery3
Doctors with a page on this site (124)
- Aaron C. Johansen, MDEmergency Medicine
- Akua Agyeman, MDInternal Medicine
- Alessandro A. Giambartolomei, MDInternal Medicine
- Alexandra H. Leon GuerreroGeneral Surgery
- Alix J. Chenet, MDInternal Medicine
- Amgad Moussa, MDInterventional Radiology
- Amylie A. Rojas, MDFamily Practice
- Andrew C. Kim, MDOrthopedic Surgery
- Andrew J. McDonnell, MDDiagnostic Radiology
- Anna Leigh Christine Ursales, MDInfectious Disease
- Arvind K. Gupta, MDInternal Medicine
- Ashish Khandelwal, MDDiagnostic Radiology
- Augusta Uwah, MDInternal Medicine
- Bishoy Elbebawy, MDCardiovascular Disease (Cardiology)
- Brinda Rengaraju, MDInternal Medicine
- Byungsoo Kim, MDCardiovascular Disease (Cardiology)
- Caleb R. King, MDPathology
- Carmelino L. Galang, MDOrthopedic Surgery
- Chawat Tongma, MDInternal Medicine
- Dahlia Sapalo, NPNurse Practitioner
- Daniel C. Medina, MDGeneral Surgery
- Daniel S. Oh, MDGeneral Surgery
- Darren Sommer, DOHospitalist
- Dore R. Shafransky, DOInternal Medicine
And 100 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
Other emergency rooms nearby
Hospitals that list emergency services, by straight-line distance (not driving distance).
- Guam Regional Medical City7.5 mi · Dededo, GU · Acute Care Hospital
- Commonwealth Health Center134 mi · Garapan, MP · Acute Care Hospital
Other hospitals near Tamuning
Nursing homes, hospice, home health and dialysis nearby
Medicare-certified providers within 25 miles, by straight-line distance. Hospice and home health care is given at home: their address is the office.
Nursing homes
- Guam Memorial Hospital Authority1.4 mi · Barrigada, GU · 3 of 5 stars
All nursing homes in the state →
Hospice providers
- FHP Home Health - Hospice0.0 mi · Tamuning, GU
- Health Services of the Pacific - Hospice0.0 mi · Barrigada, GU
All hospice providers in the state →
Home health agencies
- FHP Home Health0.0 mi · Tamuning, GU · 3 of 5 stars
- Guam Visiting Nurses0.0 mi · Tamuning, GU · 2 of 5 stars
- Health Services of the Pacific - Home Care0.0 mi · Barrigada, GU · 3 of 5 stars
All home health agencies in the state →
Dialysis facilities
- U.S. Renal Care Tumon Dialysis0.0 mi · Barrigada, GU · 2 of 5 stars
- U.S. Renal Care Sinajana Dialysis4.7 mi · Sinajana, GU · 2 of 5 stars
- U.S. Renal Care Tamuning Dialysis4.7 mi · Hagatna, GU · 2 of 5 stars
Outpatient surgery centers nearby
Medicare-certified ambulatory surgery centers within 25 miles, by straight-line distance.
- Guam Surgicenter, LLC0.0 mi · Tamuning, GU
- Hafa Adai Specialist Group0.0 mi · Tamuning, GU
Community care nearby
Health centers, clinics, urgent care and pharmacies closest to this hospital, by straight-line distance, from official HRSA, Medicare and NPI Registry data. In a medical emergency, call 911.
Community health centers
- Northern Region Community Health Center3.3 mi · Dededo, GU · Community health center
- Temporary Site--Yigo Gym7.2 mi · Yigo, GU · Community health center
- Southern Region Community Health Center14 mi · Inarajan, GU · Community health center
Clinics and urgent care
- American Medical Center, LLC0.0 mi · Upper Tumon, GU · Urgent care center
- Guam Medical Care, LLC0.0 mi · Tamuning, GU · Urgent care center
Pharmacies
- BC RX Services0.0 mi · Tamuning, GU · Community/retail pharmacy
- Cruz Pharmacy0.0 mi · Tamuning, GU · Pharmacy
- Element 1B0.0 mi · Tamuning, GU · Pharmacy
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 Guam Memorial Hospital Authority 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.
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 | 13.7% |
|---|---|
| Deaths within 30 days: heart failure patients | 11.1% |
| Deaths within 30 days: pneumonia patients | 17% |
| Deaths within 30 days: COPD patients | 8% |
| Not reported to Medicare | Deaths within 30 days: coronary bypass surgery (CABG); Serious complications (patient safety indicator PSI-90); Complications after hip or knee replacement |
| Too few cases to report | Deaths within 30 days: stroke patients |
Source: Complications and Deaths - Hospital — CMS, released October 20, 2026; data from July 2022 to June 2025.
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) | 18.1% |
|---|---|
| Readmitted within 30 days: heart attack | 14.4% |
| Readmitted within 30 days: heart failure | 21.9% |
| Readmitted within 30 days: pneumonia | 17% |
| Readmitted within 30 days: COPD | 19.8% |
| Not reported to Medicare | Readmitted within 30 days: coronary bypass surgery; Readmitted within 30 days: hip or knee replacement |
Source: Unplanned Hospital Visits - Hospital — CMS, released October 20, 2026; data from July 2024 to June 2025.
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) | 142 minutesNational average: 162 minutes |
|---|---|
| Sepsis patients who got all the recommended early care (SEP-1) | 28%National average: 66% |
| Not reported to Medicare | Patients who left the emergency room before being seen (OP-22) |
Source: Timely and Effective Care - Hospital — CMS, released October 19, 2026; data from January 2025 to December 2025.
Not reported to Medicare: the patient survey, infections caught in the hospital. For these topics Medicare shows no result for this hospital (not reported, or too few cases).
Prices
We have not been able to read a price file for Guam Memorial Hospital Authority 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 | 85O Gov Carlos G Camacho Road, Tamuning, GU 96913 |
| County | Guam |
| State | Guam |
| Phone | (671) 647‑2552 |
| Emergency services | Yes |
| Ownership | Government - Local |
| Medicare overall rating | 2 of 5 stars |
| CMS Certification Number | 650001 |
| Name in Medicare records | GUAM MEMORIAL HOSPITAL AUTHORITY |
| Profile level | Medicare data + hospital website |
| Main phone on the hospital’s website | (671) 647‑2330[4] |
| Official website | gmha.org |
| Corrections | Report an error or suggest an update → |
Sources
- Hospital General Information — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-26, retrieved 2026-11-13
- Medicare Care Compare — official Medicare profile of this hospital
- U.S. Census Bureau ZIP code areas (Gazetteer) — approximate position (center of the ZIP code area) used for distances
From the hospital’s website
Numbers match the citations above. Checked 2026-10-30.
- Guam Memorial Hospital Authority — gmha.org
- Areas of Care — gmha.org