Quick answers
- Does Marvin K. Tam accept Medicare assignment?
- Yes. Medicare's clinician data says Marvin K. Tam 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 Marvin K. Tam see?
- In 2024, CMS data shows 3,399 Original Medicare patients and 20,304 services for Marvin K. Tam. This counts Original Medicare only and measures volume, not quality.
- What is Marvin K. Tam's NPI number?
- 1174512032. 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 Marvin K. Tam, 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 | 3,399 |
|---|---|
| Services billed to Medicare | 20,304 |
| Different services or procedures | 185 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, gadobutrol, 0.1 ml (A9585)9,082 services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)6,965 services
- Dxa bone density measurement of hip, pelvis, spine (77080)388 services
- X-ray of chest, 1 view (71045)342 services
- Mri scan of brain without contrast (70551)249 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%
- Arthritis63%
- Ischemic heart disease36%
- Chronic kidney disease33%
- Diabetes31%
Hospitals where Marvin K. Tam works
Medicare's Facility Affiliation Data lists Marvin K. Tam 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.
- Banner Baywood Medical CenterMesa, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030088
- Banner Boswell Medical CenterSun City, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030061
- Banner del E. Webb Medical CenterSun City West, AZ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 030093
- Banner Desert Medical CenterMesa, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030065
- Banner Thunderbird Medical CenterGlendale, AZ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 030089
Practice locations
Addresses where Marvin K. Tam is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 24; the Medicare profile lists all.
- 10474 W Thunderbird Blvd, Suite 100Sun City, AZ 85351 (480) 610‑7400
- 1076 W Chandler Blvd, Suite 120Chandler, AZ 85224 (480) 610‑7400
- 1125 S Alma School Rd, Suite 110Chandler, AZ 85286 (480) 610‑7400
- 13555 W McDowell Rd, Suite 106Goodyear, AZ 85395 (623) 847‑2000
- 13640 N Plaza Del Rio Blvd, Suite 105Peoria, AZ 85381 (480) 610‑7400
Group practices
Medicare enrollment lists Marvin K. Tam as a member of these groups (CMS data updated October 2, 2026).
- Sonoran Radiology Ltd475 clinicians in the group
- Banner Imaging Services LLC122 clinicians in the group
- Associated Valley Radiologists, Ltd55 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Sun City
Clinicians with the same Medicare primary specialty in Sun City, AZ — not a recommendation.
Other clinicians in Sonoran Radiology Ltd
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174512032 |
| 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