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Internal Medicine

Francis G. Buto, MD

Works at hospitals in Honolulu, HI · Aiea, HI · Hawaii

Summary

Dr. Francis G. Buto, MD is an internal medicine doctor at 98 -1079 Moanalua Rd, Suite 500, Aiea, HI 96701. Phone: (808) 488-0990. Accepts Medicare assignment. In 2024, Francis G. Buto had 442 Original Medicare patients and 1,836 services. NPI 1124061189. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Francis G. Buto, 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 Francis G. Buto accept Medicare assignment?
Yes. Medicare's clinician data says Francis G. Buto 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 Francis G. Buto see?
In 2024, CMS data shows 442 Original Medicare patients and 1,836 services for Francis G. Buto. This counts Original Medicare only and measures volume, not quality.
What is Francis G. Buto's NPI number?
1124061189. 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 Francis G. Buto, 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 patients442
Services billed to Medicare1,836
Different services or procedures23
Participating Medicare providerYes
Average age of these patients78

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)898 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)307 services
  3. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)193 services
  4. Telephone medical discussion with physician, 5-10 minutes (99441)86 services
  5. Administration of influenza virus vaccine (G0008)73 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%
  • Diabetes30%
  • Arthritis23%
  • Osteoporosis23%
  • Chronic kidney disease21%

Hospitals where Francis G. Buto works

Medicare's Facility Affiliation Data lists Francis G. Buto at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Francis G. Buto is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Francis G. Buto as a member of this group (CMS data updated October 2, 2026).

  • Pearl City Medical Associates Inc8 clinicians in the group

Specialties

Find other Internal Medicine doctors in Hawaii →

Other internal medicine doctors in Aiea

Clinicians with the same Medicare primary specialty in Aiea, HI — not a recommendation.

All internal medicine doctors in Aiea →

Other clinicians in Pearl City Medical Associates Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolCreighton University School Of Medicine
Graduation year1982 (44 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1124061189
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. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians