Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Rengaraju Ramasamy, MD

Individual provider Internal Medicine Physician · NPI 1720284425

Dr. Rengaraju Ramasamy, MD practises Internal Medicine in Oka Tamuning, Guam. Qualified in 1983, 43 years ago. Practices with Guam Memorial Hospital, a 132-clinician group and accepts Medicare assignment. Licensed in Guam.

Years since qualifying
43
Licensed in
GU
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address may be wrong

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

850 Governor Carlos Camacho Rd
Oka Tamuning, GU 96913-3128 Not confirmed with CMS for 19 years — call before visiting
Phone: (671) 647-2418
Fax: (671) 649-5508

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence M001418 (GU)

Record details

NPI number1720284425
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 21, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice Guam Memorial Hospital — 132 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients86
Services billed 517 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Oka Tamuning