Timothy Au, M.D.
Internal Medicine Physician · Honolulu, HI
Timothy Au, M.D. is an internal medicine physician with a practice address in Honolulu, Hawaii, and NPI 1518287598, issued on Jun 1, 2010. Check the license on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Timothy Au
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 321 N Kuakini St, Honolulu, HI 96817
- Phone
- (808) 521-3885
- Enumerated
- Jun 1, 2010
- Entity
- Type 1 · individual
Also registered at 321 N Kuakini St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jared Acoba, M.D.Hematology & Oncology Physician1508889338
- Thomas Au, MDInternal Medicine Physician1184770463
- Steven Azuma, M.D.Cardiovascular Disease Physician1518966233
- Arlene Baldillo, D.O.Obstetrics & Gynecology Physician1124234331
- Baron Ching, M.D.Internal Medicine Physician1003959065
- Ronald Chock, M.D.Otolaryngology Physician1891812236
Verify Timothy Au in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2.0 times the Medicare Part D claims of the average internal medicine physician in 2024
5,580 Medicare Part D claims for 468 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Atorvastatin Calcium584 claims
- Amlodipine Besylate422 claims
- Losartan Potassium287 claims
- Levothyroxine Sodium212 claims
- Simvastatin189 claims
- Metformin Hcl148 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.
676 internal medicine physician records list a Honolulu practice address
They are 676 of the 12,408 NPPES records with a Honolulu practice address, and 1,022 internal medicine physician records in Hawaii.
All 676 in Honolulu → All 1,022 in Hawaii → Every provider in Honolulu →
Other internal medicine physician records in Hawaii
- Michael Abdo, M.D.Ewa Beach, HI1730671116
- Carlos Abeyta, MDHilo, HI1942253109
- Harry Acuna, MDWaipahu, HI1598872707
- Dale Adams, MDKailua, HI1982709101
- Kevin Adams, MDHonolulu, HI1275640567
- Quinlinn Adolpho, MDTripler Amc, HI1871098483
- Kyan Renie AgbayaniHonolulu, HI1083101323
- Wesam Agha, DOKealakekua, HI1700273554
- Ron Ah Loy, M.D.Kamuela, HI1598795403
- Timothy Ahu, MDAiea, HI1275611204
Common questions
What is Timothy Au, M.D.'s NPI number?
Timothy Au, M.D.'s National Provider Identifier (NPI) is 1518287598, issued on Jun 1, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Au, M.D. located?
The NPPES record lists a practice address at 321 N Kuakini St, Honolulu, HI, 96817. Phone: (808) 521-3885. Providers update this record themselves, so call before visiting.
How can I verify Timothy Au, M.D.'s license?
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 Timothy Au, M.D. prescribe under Medicare Part D?
In 2024, Timothy Au, M.D. had 5,580 Medicare Part D claims for 468 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.