Roy M. Matsuyama, M.D.
Gastroenterology Physician · Kahului, HI
Roy M. Matsuyama, M.D. is a gastroenterology physician with a practice address in Kahului, Hawaii, and NPI 1144356783, issued on Feb 26, 2007. Check the license (Hawaii 17851, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Roy M. Matsuyama
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 17851 HI
Self-reported in NPPES; status is on the state search - Practice location
- 173 Hoohana St, Kahului, HI 96732
- Phone
- (808) 871-7222
- Enumerated
- Feb 26, 2007
- Record last updated
- Feb 3, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (808) 871-2222
- Medicare enrollment
- Enrolled (PECOS I20150305000903); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 81 in Hawaii → Look up another NPI →
Verify Roy M. Matsuyama in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 17851Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average gastroenterology physician in 2024
374 Medicare Part D claims for 198 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Gavilyte-G106 claims
- Omeprazole62 claims
- Pantoprazole Sodium41 claims
- Peg-3350 And Electrolytes23 claims
- Mesalamine20 claims
- Creon11 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.
Industry payments in 2024: $316.85
5 payments; by number, the most common kind was food and beverage; the largest payer was Cook Medical LLC. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Roy M. Matsuyama among 81 gastroenterology physician records in Hawaii
Roy M. Matsuyama, M.D. is one of 81 gastroenterology physician records with a practice address in Hawaii. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 60% of them.
- NPI issued2007 · 60% of these records are older, 30% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1980 · median 1999 among the 56 with a school on file
- Record last updated2015 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Hawaii
There are 81 gastroenterology physician records in Hawaii.
All 81 in Hawaii → Every provider in Kahului → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Joanne Godley, MDKahului, HI 967321508982828
- Edward Bourke, MDKailua, HI 967341851625479
- Kerian Dodds, M.D.Kailua, HI 967341902250723
- Robert Jao, M.D.Kailua, HI 967341285707547
- Naoky Tsai, MDKailua, HI 967341245214618
- Parthasarathy Govindarajan, MDKailua Kona, HI 967401154482503
- Loreli Oka, M.D.Kailua Kona, HI 967401922112648
- Ron Ah Loy, M.D.Kamuela, HI 967431598795403
Common questions
What is Roy M. Matsuyama, M.D.'s NPI number?
Roy M. Matsuyama, M.D.'s National Provider Identifier (NPI) is 1144356783, issued on Feb 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Roy M. Matsuyama, M.D. located?
The NPPES record lists a practice address at 173 Hoohana St, Kahului, HI, 96732. Phone: (808) 871-7222. Providers update this record themselves, so call before visiting.
How can I verify Roy M. Matsuyama, M.D.'s license?
NPPES lists Hawaii license number 17851, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Roy M. Matsuyama, M.D. prescribe under Medicare Part D?
In 2024, Roy M. Matsuyama, M.D. had 374 Medicare Part D claims for 198 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.