Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Fernan F. De Guzman, MD

Individual provider Specialist · NPI 1669434254

Dr. Fernan F. De Guzman, MD practises Anesthesiology in Tamuning, Guam. Qualified in 1990, 36 years ago. Practices with Guam Memorial Hospital, a 132-clinician group and accepts Medicare assignment. Licensed in Guam.

Years since qualifying
36
Licensed in
GU
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address may be wrong

The ZIP code does not match the city and state on this record. Call before visiting.

548 S Marine Corps Dr
Tamuning, GU 96913
Phone: (671) 646-5824
Fax: (671) 647-3546

No coordinates on file. Search this address in Google Maps

Specialties & licences

Specialist (primary) Taxonomy 174400000X (GU)

Record details

NPI number1669434254
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 6, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Also practisesINTERVENTIONAL PAIN MANAGEMENT
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Group practice Guam Memorial Hospital — 132 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients81
Services billed 85 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Guam Memorial Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 132 clinicians in the practice; 12 are shown here.

Other providers in Tamuning