David Tetsuji Ishiyama, M.D.
Emergency Medicine Physician · Grand Rapids, MI
David Tetsuji Ishiyama, M.D. is an emergency medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1407177884, issued on Jun 19, 2010. Check the license (Michigan 4301096372, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- David Tetsuji Ishiyama
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 4301096372 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Monroe Ave NW, Grand Rapids, MI 49503
- Phone
- (616) 391-8879
- Enumerated
- Jun 19, 2010
- Record last updated
- May 31, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130730000120); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Human Medicine, 2010
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,083 in Michigan → Look up another NPI →
Also registered at 1000 Monroe Ave NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Loanna Abreu Perez, MA, LLPCounseling Psychologist1245756097
- Noor Al Khori, M.D.Student in an Organized Health Care Education/Training Program1508154766
- Kaitlyn Anderson, LLPCProfessional Counselor1457109977
- Finn Asterion, LLMSWClinical Social Worker1497364830
- Kerry Beduna, PHDPsychologist1346721438
- Rahul Bhandari, MDInternal Medicine Physician1467674010
Verify David Tetsuji Ishiyama in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301096372Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average emergency medicine physician in 2024
128 Medicare Part D claims for 76 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen18 claims
- Ondansetron Odt12 claims
- Prednisone12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Iep Observation Medicine - Jackson PLLCJackson, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Tetsuji Ishiyama among 3,083 emergency medicine physician records in Michigan
David Tetsuji Ishiyama, M.D. is one of 3,083 emergency medicine physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 42% of them.
- NPI issued2010 · 42% of these records are older, 55% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2013 among the 1,931 with a school on file
- Record last updated2013 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
192 emergency medicine physician records list a practice address in Grand Rapids
They are 192 of the 18,005 NPPES records with a practice address in Grand Rapids, and 3,083 emergency medicine physician records in Michigan.
All 3,083 in Michigan → Every provider in Grand Rapids → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Adam Anderson, MDGrand Rapids, MI 495031003805268
- Kristi Artz, MDGrand Rapids, MI 495031558301820
- Kathleen Blazek, MDGrand Rapids, MI 495031083672729
- Christopher Cahill, DOGrand Rapids, MI 495031265480263
- Jennifer Ekkens, DOGrand Rapids, MI 495031275591414
- Mark Figurski, MDGrand Rapids, MI 495031972598340
- Donald Findlay, DOGrand Rapids, MI 495031114912581
- Eric Kaminskas, MDGrand Rapids, MI 495031598704405
Common questions
What is David Tetsuji Ishiyama, M.D.'s NPI number?
David Tetsuji Ishiyama, M.D.'s National Provider Identifier (NPI) is 1407177884, issued on Jun 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is David Tetsuji Ishiyama, M.D. located?
The NPPES record lists a practice address at 1000 Monroe Ave NW, Grand Rapids, MI, 49503. Phone: (616) 391-8879. Providers update this record themselves, so call before visiting.
How can I verify David Tetsuji Ishiyama, M.D.'s license?
NPPES lists Michigan license number 4301096372, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David Tetsuji Ishiyama, M.D. prescribe under Medicare Part D?
In 2024, David Tetsuji Ishiyama, M.D. had 128 Medicare Part D claims for 76 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.