Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Cardiovascular Disease (Cardiology)

William M. Dang Jr., MD

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

Summary

Dr. William M. Dang Jr., MD is a cardiologist at 1441 Kapiolani Blvd, Suite 825, Honolulu, HI 96814. Phone: (808) 521-8211. Accepts Medicare assignment. In 2024, William M. Dang Jr. had 282 Original Medicare patients and 1,379 services. NPI 1386701449. 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 William M. Dang 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 William M. Dang Jr. accept Medicare assignment?
Yes. Medicare's clinician data says William M. Dang 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 William M. Dang Jr. see?
In 2024, CMS data shows 282 Original Medicare patients and 1,379 services for William M. Dang Jr.. This counts Original Medicare only and measures volume, not quality.
What is William M. Dang Jr.'s NPI number?
1386701449. 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 William M. Dang 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 patients282
Services billed to Medicare1,379
Different services or procedures37
Participating Medicare providerYes
Average age of these patients78

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)404 services
  2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)174 services
  3. Injection, regadenoson, 0.1 mg (J2785)136 services
  4. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)126 services
  5. Technetium tc-99m sestamibi, diagnostic, per study dose (A9500)66 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%
  • Ischemic heart disease51%
  • Chronic kidney disease51%
  • Diabetes49%
  • Atrial fibrillation49%

Hospitals where William M. Dang Jr. works

Medicare's Facility Affiliation Data lists William M. Dang Jr. 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.

  • 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
  • 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 William M. Dang Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists William M. Dang Jr. as a member of this group (CMS data updated October 2, 2026).

  • Cardiology Associates Inc2 clinicians in the group

Specialties

Find other Cardiovascular Disease (Cardiology) doctors in Hawaii →

Other cardiologists in Honolulu

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

All cardiologists in Honolulu →

Other clinicians in Cardiology 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 year1980 (46 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1386701449
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