David Ishiyama, M.D.
NPI 1407177884 · Emergency Medicine Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Ishiyama, M.D. is a Emergency Medicine Physician provider in Grand Rapids, MI (NPI 1407177884).
Provider details
- NPI number
- 1407177884
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301096372 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
687 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 348 | $170 |
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician Only93042 | 102 | $6 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 80 | $118 |
| Critical Care, First 30-74 Minutes99291 | 55 | $205 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 38 | $109 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 37 | $165 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 18 | 18 |
| Ondansetronbrand: Ondansetron Odt | 12 | 12 |
| Prednisone | 12 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-19
- Last updated
- 2013-05-31
Frequently asked questions
- What is David Ishiyama's NPI number?
- David Ishiyama's National Provider Identifier (NPI) is 1407177884, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Ishiyama's specialty?
- David Ishiyama is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Ishiyama located?
- David Ishiyama's practice location on file with NPPES is 1000 Monroe Ave Nw, Grand Rapids, MI 49503-1455.
- What is David Ishiyama's phone number?
- The practice phone number listed in the NPPES registry for David Ishiyama is (616) 391-8879.
- Does David Ishiyama accept Medicare?
- David Ishiyama is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Ishiyama's NPI active?
- Yes — David Ishiyama's NPI (1407177884) is active in the NPPES registry as of the last update on 2013-05-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.