Quick answers
- Does Hiroshi Yamasaki accept Medicare assignment?
- Yes. Medicare's clinician data says Hiroshi Yamasaki 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 Hiroshi Yamasaki see?
- In 2024, CMS data shows 684 Original Medicare patients and 2,166 services for Hiroshi Yamasaki. This counts Original Medicare only and measures volume, not quality.
- What is Hiroshi Yamasaki's NPI number?
- 1538161187. 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 Hiroshi Yamasaki, 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 | 684 |
|---|---|
| Services billed to Medicare | 2,166 |
| Different services or procedures | 75 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)659 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)355 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)322 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)77 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)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%
- Ischemic heart disease69%
- Heart failure55%
- Arthritis51%
- Diabetes49%
Hospitals where Hiroshi Yamasaki works
Medicare's Facility Affiliation Data lists Hiroshi Yamasaki 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.
- Beaumont Hospital - Grosse PointeGrosse Pointe, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230089
- Henry Ford Health HospitalDetroit, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230053
- Henry Ford Health St John HospitalDetroit, MI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 230165
- Henry Ford Health Warren HospitalWarren, MI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 230195
- Henry Ford Macomb HospitalClinton Township, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230047
Practice locations
Addresses where Hiroshi Yamasaki is enrolled with Medicare (CMS data updated October 2, 2026).
- 11800 E 12 Mile RdWarren, MI 48093 (586) 573‑5000
- 25195 Kelly Rd, Suite ARoseville, MI 48066 (586) 775‑4594
- 27351 Dequindre RdMadison Heights, MI 48071 (248) 967‑7000
Group practices
Medicare enrollment lists Hiroshi Yamasaki as a member of these groups (CMS data updated October 2, 2026).
- Henry Ford Health St. John Hospital348 clinicians in the group
- Henry Ford Health Macomb Oakland Hospital172 clinicians in the group
Specialties
Other interventional cardiologists in Warren
Clinicians with the same Medicare primary specialty in Warren, MI — not a recommendation.
Other clinicians in Henry Ford Health St. John Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538161187 |
| 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