PROVIDER PROFILE · NPI 1407177884

David IshiyamaM.D.

Emergency MedicineGrand Rapids, MII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

666

Unique beneficiaries

—

Total services

687

Distinct HCPCS

Medicare payment

$71K

Peer benchmark

Total Medicare services vs. 2,370 Emergency Medicine providers in MI — top quintile (cohort median 308).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$162

Distinct drugs

Brand share

71.4%

Top prescribed drugs

Hydrocodone/Acetaminophen18 claims

Ondansetron12 claims

Prednisone12 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where David Ishiyama's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 38 inbound referrers · 135 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
W.A. FOOTE MEMORIAL HOSPITAL, INC.	575	2,003
Samir Parikh Diagnostic Radiology · Jackson, MI	96	166
James Heisel Diagnostic Radiology · Jackson, MI	93	165
Mohammad Asad Diagnostic Radiology · Jackson, MI	93	161
ANDERSON, LIBBY	88	133
Waseem Ullah Diagnostic Radiology · Jackson, MI	71	119
Tareq Baghal Interventional Cardiology · Allen Park, MI	59	113
WILLIAMSON, DAVID	54	84
Mumtaz Memon Cardiology · Jackson, MI	53	92
Vishal Ruparelia Diagnostic Radiology · Royal Oak, MI	33	50
Jashu Patel Cardiology · Jackson, MI	30	47
Moiz Ali Internal Medicine · Fort Worth, TX	25	34

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
W.A. FOOTE MEMORIAL HOSPITAL, INC.	392	1,449
Jackson Community Ambulance Inc. Ambulance Service Provider · Ann Arbor, MI	236	535
PATEL, RENUKA	126	200
PATEL, PIYUSH	120	197
Cathy Glick Cardiology · Jackson, MI	112	225
SHENAI, BHASKAR	104	170
Eric Hoover Diagnostic Radiology · Jackson, MI	95	161
SMITH, MARK	86	114
Samir Parikh Diagnostic Radiology · Jackson, MI	86	134
Arvind Prabhu Cardiology · Jackson, MI	83	166
Sadasiva Reddy Diagnostic Radiology · Jackson, MI	72	121
Waseem Ullah Diagnostic Radiology · Jackson, MI	69	131

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history