Sydney Y. Tatsuno, MD
Internal Medicine Physician · Hilo, HI
Sydney Y. Tatsuno, MD is an internal medicine physician with a practice address in Hilo, Hawaii, and NPI 1467547307, issued on Oct 4, 2006. Check the license (Hawaii MD4671, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sydney Y. Tatsuno
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD4671 HI
Self-reported in NPPES; status is on the state search - Practice location
- 868 Ululani St, Hilo, HI 96720
- Phone
- (808) 969-1671
- Enumerated
- Oct 4, 2006
- Record last updated
- Oct 25, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (808) 969-7557
- Medicaid ID
- 01585001 HI
- Medicare enrollment
- Enrolled (PECOS I20080616000222); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 902 in Hawaii → Look up another NPI →
Also registered at 868 Ululani St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wendy Barnes, MDInternal Medicine Physician1164534806
- Heather Hirata, BC-APRNFamily Nurse Practitioner1316180714
- Jerem Kaawaloa, M.D.Family Medicine Physician1114113495
- Young Kim, M.D.Internal Medicine Physician1336206960
- Charles Mauro, MDDermatology Physician1205840469
- Miles Nakatsu, R.PH., CDE, CDMPharmacist1649262619
Verify Sydney Y. Tatsuno in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD4671Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average internal medicine physician in 2024
8,856 Medicare Part D claims for 737 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 172 claims were for opioids.
Most prescribed
- Pravastatin Sodium590 claims
- Amlodipine Besylate538 claims
- Atorvastatin Calcium442 claims
- Ezetimibe317 claims
- Losartan Potassium265 claims
- Pantoprazole Sodium228 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: $272.48
17 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Sydney Y. Tatsuno among 902 internal medicine physician records in Hawaii
Sydney Y. Tatsuno, MD is one of 902 internal medicine physician records with a practice address in Hawaii. 71% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 55% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated1980 · median 2001 among the 491 with a school on file
- Record last updated2007 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 internal medicine physician records list a practice address in Hilo
They are 34 of the 1,758 NPPES records with a practice address in Hilo, and 902 internal medicine physician records in Hawaii.
All 902 in Hawaii → Every provider in Hilo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Carlos Abeyta, MDHilo, HI 967201942253109
- Wendy Barnes, MDHilo, HI 967201164534806
- Daniel Belcher, M.D.Hilo, HI 967201144270927
- Francis Cavanaugh, MDHilo, HI 967201033165998
- Alan Desilva, MD INC.Hilo, HI 967201790885994
- Mary Iyer, M.D.Hilo, HI 967201366470502
- David Jung, M.D.Hilo, HI 967201649281643
- Craig Kadooka, M.D.Hilo, HI 967201467419630
Common questions
What is Sydney Y. Tatsuno, MD's NPI number?
Sydney Y. Tatsuno, MD's National Provider Identifier (NPI) is 1467547307, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sydney Y. Tatsuno, MD located?
The NPPES record lists a practice address at 868 Ululani St, Hilo, HI, 96720. Phone: (808) 969-1671. Providers update this record themselves, so call before visiting.
How can I verify Sydney Y. Tatsuno, MD's license?
NPPES lists Hawaii license number MD4671, 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 Sydney Y. Tatsuno, MD prescribe under Medicare Part D?
In 2024, Sydney Y. Tatsuno, MD had 8,856 Medicare Part D claims for 737 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.