Ron D. Ah Loy, M.D.
Gastroenterology Physician · Kamuela, HI
Ron D. Ah Loy, M.D. is a gastroenterology physician with a practice address in Kamuela, Hawaii, and NPI 1598795403, issued on Jul 4, 2006. Check the license (Hawaii MD4748, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ron D. Ah Loy
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD4748 HI
Self-reported in NPPES; status is on the state search - Practice location
- 64-5188 Kinohou St, Kamuela, HI 96743
- Phone
- (808) 887-0600
- Enumerated
- Jul 4, 2006
- Record last updated
- Jun 18, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (808) 887-6699
- Medicaid ID
- 01314401 HI
- Medicare enrollment
- Enrolled (PECOS I20040727000261); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1978
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 81 in Hawaii → Look up another NPI →
Also registered at 64-5188 Kinohou St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Kimball, M.D.Gastroenterology Physician1265467096
Verify Ron D. Ah Loy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD4748Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average gastroenterology physician in 2024
212 Medicare Part D claims for 140 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Gavilyte-G53 claims
- Gavilyte-C29 claims
- Peg-3350 And Electrolytes26 claims
- Vemlidy19 claims
- Omeprazole18 claims
- Tenofovir Disoproxil Fumarate11 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: $241.10
9 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. 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.
Ron D. Ah Loy among 81 gastroenterology physician records in Hawaii
Ron D. Ah Loy, 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 40% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1978 · median 1999 among the 56 with a school on file
- Record last updated2008 · 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 Kamuela → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Michael Kimball, M.D.Kamuela, HI 967431265467096
- Parthasarathy Govindarajan, MDKailua Kona, HI 967401154482503
- Loreli Oka, M.D.Kailua Kona, HI 967401922112648
- Edward Bourke, MDKailua, HI 967341851625479
- Kerian Dodds, M.D.Kailua, HI 967341902250723
- Robert Jao, M.D.Kailua, HI 967341285707547
- Naoky Tsai, MDKailua, HI 967341245214618
- Joanne Godley, MDKahului, HI 967321508982828
Common questions
What is Ron D. Ah Loy, M.D.'s NPI number?
Ron D. Ah Loy, M.D.'s National Provider Identifier (NPI) is 1598795403, issued on Jul 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ron D. Ah Loy, M.D. located?
The NPPES record lists a practice address at 64-5188 Kinohou St, Kamuela, HI, 96743. Phone: (808) 887-0600. Providers update this record themselves, so call before visiting.
How can I verify Ron D. Ah Loy, M.D.'s license?
NPPES lists Hawaii license number MD4748, 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 Ron D. Ah Loy, M.D. prescribe under Medicare Part D?
In 2024, Ron D. Ah Loy, M.D. had 212 Medicare Part D claims for 140 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.