Naoky C. Tsai, MD
Gastroenterology Physician · Kailua, HI
Naoky C. Tsai, MD is a gastroenterology physician with a practice address in Kailua, Hawaii, and NPI 1245214618, issued on Nov 30, 2005. Check the license (Hawaii 3796, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Naoky C. Tsai
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 3796 HI
Self-reported in NPPES; status is on the state search - Practice location
- 642 Ulukahiki St, Kailua, HI 96734
- Phone
- (808) 263-5174
- Enumerated
- Nov 30, 2005
- Record last updated
- Oct 30, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (808) 266-3614
- Medicaid ID
- 04806901 HI
- Medicare enrollment
- Enrolled (PECOS I20070208000095); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 81 in Hawaii → Look up another NPI →
Also registered at 642 Ulukahiki St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Arakaki, R.D.Registered Dietitian1316126642
- Eesha Bhattacharyya, MDObstetrics & Gynecology Physician1366476376
- Allison Chan, R.D.Registered Dietitian1457522294
- Susan Chapman, MDObstetrics & Gynecology Physician1316934698
- Audrey Hagiwara, MDRheumatology Physician1609496983
- Jacqueline Hardy, CPNP, APRN RX, ATCPediatric Nurse Practitioner1841403292
Verify Naoky C. Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 3796Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average gastroenterology physician in 2024
595 Medicare Part D claims for 136 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Entecavir139 claims
- Vemlidy86 claims
- Ursodiol73 claims
- Omeprazole50 claims
- Prednisone27 claims
- Tenofovir Disoproxil Fumarate25 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: $102,732.88
168 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, 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.
Bills Medicare through one group practice
- Castle Medical CenterKailua, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Naoky C. Tsai among 81 gastroenterology physician records in Hawaii
Naoky C. Tsai, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1974 · median 1999 among the 56 with a school on file
- Record last updated2007 · 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 Kailua → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Edward Bourke, MDKailua, HI 967341851625479
- Kerian Dodds, M.D.Kailua, HI 967341902250723
- Robert Jao, M.D.Kailua, HI 967341285707547
- Joanne Godley, MDKahului, HI 967321508982828
- Roy Matsuyama, M.D.Kahului, HI 967321144356783
- 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 Naoky C. Tsai, MD's NPI number?
Naoky C. Tsai, MD's National Provider Identifier (NPI) is 1245214618, issued on Nov 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Naoky C. Tsai, MD located?
The NPPES record lists a practice address at 642 Ulukahiki St, Kailua, HI, 96734. Phone: (808) 263-5174. Providers update this record themselves, so call before visiting.
How can I verify Naoky C. Tsai, MD's license?
NPPES lists Hawaii license number 3796, 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 Naoky C. Tsai, MD prescribe under Medicare Part D?
In 2024, Naoky C. Tsai, MD had 595 Medicare Part D claims for 136 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.