Quick answers
- Does John Michael S. Chua Chiaco accept Medicare assignment?
- Yes. Medicare's clinician data says John Michael S. Chua Chiaco 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 John Michael S. Chua Chiaco see?
- In 2024, CMS data shows 1,654 Original Medicare patients and 6,342 services for John Michael S. Chua Chiaco. This counts Original Medicare only and measures volume, not quality.
- What is John Michael S. Chua Chiaco's NPI number?
- 1629234406. 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 John Michael S. Chua Chiaco, 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 patients | 1,654 |
|---|---|
| Services billed to Medicare | 6,342 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)863 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)552 services
- Provision of test materials and equipment for home inr monitoring of patient with either mechanical heart valve(s), chronic atrial fibrillation, or venous thromboembolism who meets medicare coverage criteria; includes: provision of materials for use in the (G0249)316 services
- Physician review, interpretation, and patient management of home inr testing for patient with either mechanical heart valve(s), chronic atrial fibrillation, or venous thromboembolism who meets medicare coverage criteria; testing not occurring more frequent (G0250)316 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)304 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 disease49%
- Arthritis48%
- Atrial fibrillation41%
- Chronic kidney disease37%
Hospitals where John Michael S. Chua Chiaco works
Medicare's Facility Affiliation Data lists John Michael S. Chua Chiaco 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.
- Aspirus Lake View HospitalTwo Harbors, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241308
- Community Memorial HospitalCloquet, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241364
- Cook HospitalCook, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241312
- North Memorial Health HospitalRobbinsdale, MN · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 240001
- St Lukes HospitalDuluth, MN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 240047
Practice locations
Addresses where John Michael S. Chua Chiaco is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1001 E Superior StDuluth, MN 55802
- 1001 E Superior St, Suite 201Duluth, MN 55802
- 1011 E 1st StDuluth, MN 55805 (218) 249‑7000
- 1015 E 1st StDuluth, MN 55805
- 1120 E 34th StHibbing, MN 55746 (218) 362‑7100
Group practices
Medicare enrollment lists John Michael S. Chua Chiaco as a member of this group (CMS data updated October 2, 2026).
- St. Luke's Hospital of Duluth405 clinicians in the group
Specialties
- Interventional Cardiologyprimary
- Internal Medicinealso
Other interventional cardiologists in Duluth
Clinicians with the same Medicare primary specialty in Duluth, MN — not a recommendation.
Other clinicians in St. Luke's Hospital of Duluth
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2006 (20 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629234406 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians