Dr. Donald Preston, MD
Internal Medicine
52% Complete
Profile completeness
ZIP Healthcare Access Score
Limited Access
ZIP 96929 • D+
41+
Years in Practice
Healthcare Access Where Dr. Donald Preston Practices
ZIP code 96929 • Dededo, GU
Significant gaps exist in healthcare availability for residents of ZIP 96929.
View full Healthcare Access Score report for ZIP 96929Conditions Dr. Donald Preston Can Help With
Based on specialty, these are the relevant healthcare access scores for the practice area
Practice Locations
1 location
About Dr. Donald Preston
Donald Preston, MD is a healthcare provider practicing in Dededo, GU.
Specialty Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
41
Years Experience
1
Location
2
States Licensed
Credentials & Board Certifications
Additional Specialties
Primary Specialty
Internal MedicineCredentials verified via NPI Registry (NPPES)
Education & Training
Medical School
Oregon Health Sciences University School Of Medicine
Class of 1985
Licenses & Practice States
Licensed in 2 states
| State | License | Classification | Primary |
|---|---|---|---|
| GU | M915 | Internal Medicine | |
| Arizona | 15459 | Internal Medicine | — |
Public Data Summary for Dr. Donald Preston
Dr. Donald Preston practices internal medicine, MD, after earning their medical degree at Oregon Health Sciences University School Of Medicine in 1985. Dr. currently practices at Blue Ocean Medical Group Llc in Dededo, GU. Their National Provider Identifier (NPI) is 1538280748, and the profile below combines data from CMS NPPES, Medicare billing records, the HHS OIG exclusion list, and — where available — CMS Open Payments, Medicare Utilization, and Part D prescriber summaries.
Dr. Donald Preston's practice is located in ZIP 96929 (Dededo, GU), which has an overall CartoChrome Healthcare Access Score of 43/100 (Limited Access). Access constraints in this ZIP code can affect wait times, specialist availability, and emergency response — context worth knowing when choosing a provider.
CMS Medicare data shows Dr. Donald Preston as a lower-volume internal medicine provider, treating approximately 213 Medicare beneficiaries and delivering 631 services in the most recent reporting year. That panel size indicates a smaller, more selective practice pattern.
Transparency & Safety
Public records from CMS and OIG databases
Opioid Prescribing
This provider has no opioid prescriptions on file in Medicare Part D data.
Insurance & Accessibility
Reviews
Community reviews for Dr. Donald Preston
--
0 reviews
Internal Medicine Providers Nearby
Same primary specialty near ZIP 96929
FAQ
Frequently asked questions about Dr. Donald Preston
What does Dr. Donald Preston specialize in?
Dr. Donald Preston specializes in Internal Medicine. Secondary taxonomy filings also list Internal Medicine.
Where does Dr. Donald Preston practice?
Dr. Donald Preston practices at Blue Ocean Medical Group Llc in Dededo, GU.
Does Dr. Donald Preston accept Medicare?
Based on CMS records, Dr. Donald Preston has not filed a Medicare opt-out affidavit, which means they typically accept Medicare-covered patients. CMS billing data shows 213 Medicare beneficiaries treated in the most recent reporting year.
What is Dr. Donald Preston's NPI number?
Dr. Donald Preston's National Provider Identifier (NPI) is 1538280748. This is the unique 10-digit number the Centers for Medicare & Medicaid Services assigns to every practicing US healthcare provider. You can verify this number directly at the NPPES NPI Registry.