Thomas T. Deleon, M.D.
Hematology & Oncology Physician · Wailuku, HI
Thomas T. Deleon, M.D. is a hematology & oncology physician with a practice address in Wailuku, Hawaii, and NPI 1245526623, issued on Jun 23, 2011. Check the license (Hawaii MD-17723, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Thomas T. Deleon
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- MD-17723 HI
50361 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 80 Mahalani St, Wailuku, HI 96793
- Phone
- (808) 243-6000
- Enumerated
- Jun 23, 2011
- Record last updated
- May 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181003002057); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 49 in Hawaii → Look up another NPI →
Also registered at 80 Mahalani St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephen Bangle, MDInternal Medicine Physician1043304595
- Andrew Barlow, MDObstetrics & Gynecology Physician1427460013
- Mehtap Berkmen, MDEndocrinology, Diabetes & Metabolism Physician1467481150
- Barbara Bezdicek, MDObstetrics & Gynecology Physician1003951906
- Cassandra Bick JohnsonRegistered Dietitian1033516687
- Rebecca Bicker, MDObstetrics & Gynecology Physician1679626253
Verify Thomas T. Deleon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD-17723Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
869 Medicare Part D claims for 141 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims. 42 claims were for opioids.
Most prescribed
- Letrozole111 claims
- Prednisone66 claims
- Ibrance51 claims
- Abiraterone Acetate48 claims
- Ondansetron Hcl46 claims
- Hydroxyurea39 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.
Bills Medicare through one group practice
- Hawaii Permanente Medical Group IncWailuku, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas T. Deleon among 49 hematology & oncology physician records in Hawaii
Thomas T. Deleon, M.D. is one of 49 hematology & oncology physician records with a practice address in Hawaii. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 80% of them.
- NPI issued2011 · 80% of these records are older, 18% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2011 · median 2000 among the 34 with a school on file
- Record last updated2021 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Hawaii
There are 49 hematology & oncology physician records in Hawaii.
All 49 in Hawaii → Every provider in Wailuku → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- William Adler, M.D.Wailuku, HI 967931710918610
- Devena Alston-Johnson, MDWailuku, HI 967931891732616
- Ramin Altaha, MDWailuku, HI 967931083649982
- Larry Ebbert, MDWailuku, HI 967931518058163
- Gregory Pollack, M.D.Wailuku, HI 967931346428158
- Judy Schmidt, M.D.Wailuku, HI 967931679578827
- Dhiraj Yadav, M.D.Wailuku, HI 967931104267608
- Kenneth Herbst, M.D.Waianae, HI 967921497783351
Common questions
What is Thomas T. Deleon, M.D.'s NPI number?
Thomas T. Deleon, M.D.'s National Provider Identifier (NPI) is 1245526623, issued on Jun 23, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Thomas T. Deleon, M.D. located?
The NPPES record lists a practice address at 80 Mahalani St, Wailuku, HI, 96793. Phone: (808) 243-6000. Providers update this record themselves, so call before visiting.
How can I verify Thomas T. Deleon, M.D.'s license?
NPPES lists Hawaii license number MD-17723, 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 Thomas T. Deleon, M.D. prescribe under Medicare Part D?
In 2024, Thomas T. Deleon, M.D. had 869 Medicare Part D claims for 141 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.