Siang Y. Tan, MD
Endocrinology, Diabetes & Metabolism Physician · Honolulu, HI
Siang Y. Tan, MD is an endocrinology, diabetes & metabolism physician with a practice address in Honolulu, Hawaii, and NPI 1629163449, issued on Oct 4, 2006. Check the license (Hawaii 3367, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Siang Y. Tan
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 3367 HI
Self-reported in NPPES; status is on the state search - Practice location
- 2226 Liliha St, Honolulu, HI 96817
- Phone
- (808) 526-9784
- Enumerated
- Oct 4, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (808) 526-9784
- Medicaid ID
- 04280001 HI
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 24 in Hawaii → Look up another NPI →
Also registered at 2226 Liliha St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Siang Y. Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 3367Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
29 Medicare Part D claims, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D.
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.
Siang Y. Tan among 24 endocrinology, diabetes & metabolism physician records in Hawaii
Siang Y. Tan, MD is one of 24 endocrinology, diabetes & metabolism physician records with a practice address in Hawaii. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 63% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 67% of these records are
- 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 207RE0101X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Hawaii
There are 24 endocrinology, diabetes & metabolism physician records in Hawaii.
All 24 in Hawaii → Every provider in Honolulu → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Anna Melissa Lo, M.D.Honolulu, HI 968171417308685
- Alan Parsa, M.D.Honolulu, HI 968171215268362
- Rae Teramoto, M.D.Honolulu, HI 968171487742128
- Jennifer Loh, MDHonolulu, HI 968141497919914
- Cindy Pau, MDHonolulu, HI 968141386803906
- Emily YapHonolulu, HI 968141972584365
- Isabel Casimiro, M.D., PH.D.Honolulu, HI 968131942615596
- Mariko Johnson, M.D.Honolulu, HI 968131629279617
Common questions
What is Siang Y. Tan, MD's NPI number?
Siang Y. Tan, MD's National Provider Identifier (NPI) is 1629163449, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Siang Y. Tan, MD located?
The NPPES record lists a practice address at 2226 Liliha St, Honolulu, HI, 96817. Phone: (808) 526-9784. Providers update this record themselves, so call before visiting.
How can I verify Siang Y. Tan, MD's license?
NPPES lists Hawaii license number 3367, 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 Siang Y. Tan, MD prescribe under Medicare Part D?
In 2024, Siang Y. Tan, MD had 29 Medicare Part D claims; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.