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Internal Medicine

Leopoldo C. Arcilla Jr., MD

Sees patients in Tamuning, GU · Guam

Summary

Dr. Leopoldo C. Arcilla Jr., MD is an internal medicine doctor at 1757 Army Dr, Suite 108, Tamuning, GU 96913. Phone: (671) 647-4533. Accepts Medicare assignment. In 2024, Leopoldo C. Arcilla Jr. had 536 Original Medicare patients and 1,466 services. NPI 1144364753. Source: CMS National Downloadable File, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 1757 Army Dr, Suite 108, Tamuning, GU 96913 · Directions
  • Phone: (671) 647‑4533
  • Medicare: Accepts Medicare assignment
  • Medical school: graduated 1997 (29 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Leopoldo C. Arcilla Jr., joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Leopoldo C. Arcilla Jr. accept Medicare assignment?
Yes. Medicare's clinician data says Leopoldo C. Arcilla Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Leopoldo C. Arcilla Jr. see?
In 2024, CMS data shows 536 Original Medicare patients and 1,466 services for Leopoldo C. Arcilla Jr.. This counts Original Medicare only and measures volume, not quality.
What is Leopoldo C. Arcilla Jr.'s NPI number?
1144364753. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Leopoldo C. Arcilla Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients536
Services billed to Medicare1,466
Different services or procedures11
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,354 services
  2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)48 services
  3. Influenza vaccine, trivalent, 0.5 ml dosage (90658)21 services
  4. Administration of influenza virus vaccine (G0008)21 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Diabetes75%
  • Chronic kidney disease22%
  • Arthritis21%
  • Heart failure15%

Practice locations

Addresses where Leopoldo C. Arcilla Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other Internal Medicine doctors in Guam →

Other internal medicine doctors in Tamuning

Clinicians with the same Medicare primary specialty in Tamuning, GU — not a recommendation.

All internal medicine doctors in Tamuning →

Clinician information

CredentialMD
Graduation year1997 (29 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1144364753
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  2. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians