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Diagnostic Radiology

Mitchell T. Gudmundsson, MD

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

Summary

Dr. Mitchell T. Gudmundsson, MD is a radiologist at 640 Ulukahiki St, Kailua, HI 96734. Phone: (808) 263-5500. Accepts Medicare assignment. In 2024, Mitchell T. Gudmundsson had 1,994 Original Medicare patients and 3,139 services. NPI 1558503359. 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 Mitchell T. Gudmundsson, 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 Mitchell T. Gudmundsson accept Medicare assignment?
Yes. Medicare's clinician data says Mitchell T. Gudmundsson 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 Mitchell T. Gudmundsson see?
In 2024, CMS data shows 1,994 Original Medicare patients and 3,139 services for Mitchell T. Gudmundsson. This counts Original Medicare only and measures volume, not quality.
What is Mitchell T. Gudmundsson's NPI number?
1558503359. 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 Mitchell T. Gudmundsson, 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 patients1,994
Services billed to Medicare3,139
Different services or procedures207
Participating Medicare providerYes
Average age of these patients78

Most frequent services

  1. X-ray of chest, 1 view (71045)471 services
  2. X-ray of chest, 2 views (71046)148 services
  3. Ct scan of abdomen and pelvis with contrast (74177)140 services
  4. Ct scan head or brain without contrast (70450)139 services
  5. Screening mammography (77067)127 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%
  • Chronic kidney disease45%
  • Diabetes43%
  • Arthritis37%
  • Ischemic heart disease31%

Hospitals where Mitchell T. Gudmundsson works

Medicare's Facility Affiliation Data lists Mitchell T. Gudmundsson 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.

  • Adventist Health CastleKailua, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120006
  • Kuakini Medical CenterHonolulu, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120007
  • Pali Momi Medical CenterAiea, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120026
  • Straub Clinic and HospitalHonolulu, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120022
  • The Queens Medical CenterHonolulu, HI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 120001

Practice locations

Addresses where Mitchell T. Gudmundsson is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Mitchell T. Gudmundsson as a member of this group (CMS data updated October 2, 2026).

  • Pacific Radiology Group Inc31 clinicians in the group

Specialties

Find other Diagnostic Radiology doctors in Hawaii →

Other radiologists in Kailua

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

All radiologists in Kailua →

Other clinicians in Pacific Radiology Group Inc

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

Clinician information

CredentialMD
Graduation year2009 (17 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1558503359
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